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Everything posted by wolfvid

  1. This is a contribution from a member whose lawyer based this contract on the basic one written by PERA (The Production Equipment Rental Association www.productionequipment.com.) This is a suggestion only. none shall be liable for any consequences resulting from the use of this contact language. This may not be construed as legal advice from anybody or nobody. Substitute your name or your companies name for XXX. And you don't need to be a corporation to enforce this. Also do not let anybody change anything in this, there is always a purpose in the changes and it is not in your favor ever!! If you don't understand some of this hire a lawyer to explain it to you , the few hundred $ spent on lawyers will save you thousands latter 1. Inspection. Customer (or "Your" or "You") acknowledge(s) that s/he has examined and tested the items of equipment listed herein (the "Equipment") and that the same are in good working condition and accepts the same as is, and without any rental reductions or claim therefore. You acknowledge that this Equipment is leased to You without warranty or guarantee of any kind express or implied and that XXX (or "XXX") assumes no responsibility, implied in fact or law, for the performance or non-performance of said Equipment. You shall return to XXX, at Your expense, for exchange for other Equipment, any listed item which, subsequent to delivery, becomes inoperable. 2. Delivery. You agree that You take delivery of the Equipment and assume all risk of loss from the time that the Equipment is set aside from XXX'S rental inventory at its facility for Your use. You are responsible for any and all damage that You cause to Equipment, property and person(s) during testing and for this entire Agreement term. 3. Use. This Equipment, or any part hereof, may not be removed from the United States, and shall not be subleased or assigned, without XXX's prior written consent. Any unpermitted attempt to assign or sublease without XXX's written permission shall be null and void. The Equipment shall be used only by Your duly qualified employees and/or agents. You shall keep the Equipment in Your sole care, custody and control and shall not permit it to be used in violation of any federal, state or municipal statutes, rules or regulations. 4. Return, Repair, Maintenance. If any item of Equipment is returned in a damaged, destroyed or non-working condition, or if any such item is not returned for any reason (including, but not limited to, destruction, confiscation, theft or act of God), You shall pay to XXX, the cost to replace the same item, or closest, comparably equipped, equivalent, or better new model if immediately available, at current retail price without deduction for depreciation. If any item is returned in a repairable, damaged condition, You shall pay to XXX the cost of such repairs as determined solely by XXX. In determining whether Equipment shall be replaced or repaired, XXX's judgment shall be conclusive upon You. Notwithstanding anything to the contrary in this Agreement and regardless of when You pay XXX, in the event of loss or damage to the Equipment, You shall be liable to pay rent at full rental rate for the Equipment item(s) irrespective of any package or other discounts agreed to at the inception of this Rental Contract, until all of the Equipment has actually been repaired and/or replaced, returned to XXX's rental inventory and XXX's invoice to You for loss and damages has been paid in full. If requested, You shall immediately advance the money to pay for the repair or replacement of missing or damaged Equipment. You acknowledge that there may be delays in repair or replacement attributable to causes beyond XXX's control. The acceptance of the return of the Equipment is not a waiver by XXX of any claims that it may have against You, nor a waiver of any claims for latent or patent damage to the Equipment. 5. Rates and Late Charges. The terms of payment are based upon Your credit information at time of rental. The first rental day shall be the day after delivery to You. The last rental day shall be the day of return if such return is after 10:00 AM. When on daily schedule, daily rate will be charged for Sundays and Holidays if Equipment is used. Rent is payable upon receipt of invoice. All invoices not paid within 10 days from invoice date will accrue late charges at the rate of 1 1/2% per month (18% annually). If XXX places the account with an attorney for collection, You agree to pay all reasonable attorneys' fees and costs which may accrue. Rental rates paid will not be applied to the purchase price of any Equipment listed herein under any circumstances. 6. Title and Ownership. You specifically acknowledge XXX's superior title and ownership of the Equipment and shall keep it free of all liens, levies and encumbrances. You acknowledge that You shall be responsible for all taxes, transportation charges, duties, customs brokers fees, bonds, and all costs imposed upon the leasing or use of said Equipment. You agree not to remove or cover over any serial numbers, tags, nameplates or logos on Equipment showing XXX's ownership. 7. Right of Entry. XXX shall have the right to inspect the Equipment at any time, anywhere during the rental term. In the event of any of the following, including but not limited to, termination of the lease period, non-payment of any rental charges, breach of any provision hereof, the filing of a proceeding in bankruptcy regarding You, or the levying of any legal process upon any item of Equipment, or upon any use of Equipment in derogation or violation of XXX's superior title and ownership, XXX and its agents shall have the unconditional rights to declare the entire amount due under this Agreement and to remove all of the Equipment without demand or notice to You, without any liability for trespass or other damage caused by any such entry, and without prejudice to XXX's right to receive rent due or accrued to and including the later of the date of removal of the Equipment, or the date this Agreement expires, plus any and all additional costs, fees, damages and loss of rents which XXX incurs in the course of repossession of the Equipment. 8. Indemnity and Liability. During and continuing after the term of this Agreement, You agree to indemnify, defend and hold XXX, its agents and employees, harmless from any and all claims, actions, suits, proceedings, costs, expenses, damages and liabilities, including attorneys' fees, arising out of or connected with, or resulting from the Equipment or the personnel provided hereunder during the term of this Agreement, including without limitation, manufacture, selection, delivery, possession, condition, use, operation, conduct, or return of said Equipment and for any violation of any statute, law, ordinance, rule or regulation of any duly constituted public authority. XXX shall not be liable for any loss or damage of any kind, whether caused by negligence, or otherwise resulting from any delay, detention, late-delivery, non-delivery, defect or deficiency in the Equipment or other materials supplied, handled, stored, repaired, transported, received or processed, or the services of technicians, drivers, or any other personnel or service provided by XXX. 9. Insurance. You shall, at Your expense, at all times from the time of delivery of Equipment to You, maintain Miscellaneous Equipment, Third Party Property Damage and Commercial General Liability insurance covering all Equipment rented for full replacement cost without deduction for depreciation and for loss of use (rents) of the Equipment in amounts and with insurance companies XXX approves. Property Insurance shall be on an "All Risk" or "Special" form, on a worldwide basis with XXX named as Loss Payee for loss or damage to Equipment. XXX shall be named as Additional Insured as respects all of your liability insurance which shall be deemed primary and non-contributory in the event of any claim or suit. All policies shall provide for 10 days written notice to XXX before any policy shall be modified or canceled. You shall deliver to XXX, upon request, evidence of insurance coverage satisfactory to XXX. Lapse or cancellation of the required insurance shall be an immediate and automatic default by You under this Agreement. 10. Foreign Use. You must notify XXX in advance of all Equipment that is due to leave the United States and You must register it with U.S. Customs prior to departure. At Your request, XXX will furnish You with a statement including serial number, country of origin and replacement value of Equipment. Adequate bonds, all customs fees and taxes are to be provided by and prepaid by You prior to shipment. Any delay due to shipping, Customs, broker, Your failure to register Equipment and any other cause shall be charged at normal daily rental rates until all Equipment is returned to XXX. 11. Aircraft use. XXX electronics and other equipment are not approved or certified for any aircraft use. The Customer agrees to save and hold harmless, indemnify and defend the Company against any and all claims and/or causes of action which arise out of improper use. 12. Shipping Costs. All air or surface shipments of Equipment by XXX for you will be shipped collect for freight charges and insurance. All Equipment You return to XXX must be shipped pre-paid and insured. You are responsible for all rental charges, costs, fees and taxes incurred once the Equipment is delivered to a Carrier. 13. Miscellaneous. This Agreement shall be deemed to have been entered into in California and governed by California State law. Should any legal proceedings arise out of this Agreement, the prevailing party, in addition to any other recovery, shall be entitled to recover all reasonable expenses including attorneys' fees. Jurisdiction and venue for all purposes are proper only in state or federal courts in Los Angeles County, California. Customer agrees that Customer has read and fully understood all product manuals and literature supplied with Rental equipment. Customer is deemed to know the law regarded permitted uses of equipment. 14. Changes..The Rental Contract and these Terms and Conditions express the entire agreement between the parties and any change thereto must be in a signed writing. If You are a corporation, the person signing this Agreement on behalf of such corporation hereby warrants that (s)he has full authority of such corporation to sign this Agreement and obligate the corporation. Said person and the corporation shall be jointly and severally liable for all rentals and all other sums that may be due and owing to XXX at any time under the terms of this Agreement. You certify that You have read and fully understand all of the above provisions prior to executing this Agreement. 15. Screen Credit. Customer agrees to include "Video Assist equipment provided by XXX" in the end titles of the film in anything but a commercial less than 5 minutes in length. I hereby rent XXX equipment subject to the conditions set forth above. I have read and agree to these conditions. I have received a price list and agree to pay the rates as quoted. -------end -----------------------------------------
  2. http://www.geekosystem.com/audioscope-microphone-singles-out-any-conversation-big-brother-is-listening/
  3. containers going from LA to East coast with film equipment now are unpacked at the airport, X-Rayed and repacked in a less than professional manner breaking sturdy boxes etc. Make sure all your stuff is "baggage handler proof" = in fiberglass shipping cases. And I thought that "known shippers" for the studios could prevent this harassment. -- dont forget to cable tie your Pelican cases, they do pop open in pressurization changes. arrrgh wolf
  4. LCD 7” Handheld TV Rechargeable battery inside They make 12V and 6V models The TV tuner is as good as the best. Easily visible in full sun with good color. We protect the LCD with a delicately applied anti-scratch and anti reflection protection film. External Lithium NP-7S battery lasts tested 6 hours. The wide viewing angle enables three people to watch. The last channel selected before power down, is remembered on next power up. There is a removable 5/8” spud on a plate for stand mounting. We provide a convenient tough hi-performance antenna with a 90-degree flex joint on BNC. Shoulder strap provided. 16:9 aspect ratio for HD wide screen & 4:3 aspect ratio for standard screen, screen size 7" diagonal, built-in mini speakers, Inputs: 1 video RCA & 2 audio RCA, “F” connector for antenna. Outputs: headphones, mini only! No video out. ATSC Digital over the air tuner + NTSC analog Tuner 125 Ch + CATV. 7-16.4V. At 12V it draws .6A with no battery. The 10” draws .7A. Will not turn on above 16V. The 7” LCD has a built-in (removable) 4400 mA LiPo 7V battery that lasts a tested 1:45 hours. Put the external NP-1 battery on the back bracket and it will operate the monitor and charge the INTERNAL battery slowly (6 Hrs). Then the monitor draws 1.4A max. The battery takes 28W Hr. Once the internal battery is fully charged, the LCD draws .6A. Turn the 7” LCD OFF (Switch on left side) and you will charge the internal battery from the external one more quickly (3 Hrs). The manufacturer claims you will not destroy the internal battery if you leave the monitor on. You will not destroy external batteries, IDX or Bauer by over-discharge as they are protected by a battery internal low voltage disconnect switch. We think that the automatic cut off voltage on the Np-1 type batteries is set too low and you will reduce those batteries lifetime if you let the dischare go to the auto turn off point always. What do you gain by removing the internal battery? Probably 10% total longer run time of external batteries and the convenience of lighter weight and for the uninitiated a more predicable performance. http://www.amazon.com/Haier-HLT71-7-Inch-Handheld-LCD/dp/B001E78UQY/ref=sr_1_1?ie=UTF8&qid=1286955791&sr=8-1 we bought 50 of these - sold 30 - they are all still good which is saying a lot. they are not as sensitive as the best Sony tuners, have not compared sensitivity to other portable TV / tuners. also make 10" ones... dont, everybody will look over your shoulder. wolf
  5. HD monitors 7”: ( downconverting and SD monitors is much cheaper) http://www.flandersscientific.com/index/Broadcast_Monitors Possibly interesting - have not seen them. Available from Film Tools http://www.filmtools.com/ in Burbank. 24 volts, audio disembedding. They have also Ican and others http://www.filmtools.com/camonboarmon.html These are all small monitors I know of: Boland (HD LCD) ,GPI (greenscreen SD CRT), LC (HD LCD from Bulgaria), Lumavec/Blackbird (SD LCD), Marshall (HD LCD, OLED), Nebtek (HD LCD), Tiffen (HD LCD, OLED), Transvideo (HD LCD), XCS (greenscreen SD CRT) Transvideo – made in France - has an expensive product with the most features; the Tiffen Ultrabright is in a similar class. However both are in the $6 to $7K range. Marshall and Nebtek, at $2100 and $2900 respectively, have units that provide similar viewability at a fraction of the cost. The Nebtek has a larger display being 16:9 and will have user adjustable framelines, which is putting it at the top of a lot of people's lists. Marshall is a Chinese supplied USA front box house. The Blackbird was the best SD LCD we heard of in terms of view-ability, but at $4K, expensive.
  6. DOWNCONVERTER Decimator Design 2 Australian made downconverter. It’s a low cost miniature 3G/HDSDI to NTSC/PAL with Aspect Ratio Conversion: Anamorphic, Letterbox, centercut. Power supply included. Rental prices are still at 95.00 per day on a 3-day week (2010 July), same as the AJA rates. New 2010 list $ 495.00. http://www.decimator.com/products-decimator2.php It downconverts to NTSC or PAL Composite signals and to HDMI, and de-embeds audio (no other flavors of SD, be it digital or analog) [september 2010 version will have audio meters]. Input can be either PAL or NTSC HD-SDI and output can be NTSC or PAL switchable composite and HDMI. Has problems with 23.98 frame on HDMI… Perry Drogo says: “The Decimator2 will pass all formats of SDI to HDMI with the next Firmware update, which will be available at the end of October 2010. For now it works as the Decimator 1 does fine for composite out at 23.98.” Importer and Rep: TECADS Inc. Contact: Perry Drogo, Phone: USA 949 597-1053, 23 Dellpadre street, Foothills Ranch Ca. 92610 Email: sales@tecads.com Website: http://www.tecads.com/FW_EXPORTS/DECIMATOR.htm In stock at: Alan Gordon, Sales guy is Ken 323 466-3561 in Hollywood Owner: Wayne Loucks waynel@alangordon.com And Birns and Sawyer http://www.birnsandsawyer.com/search.aspx?srch=decimator And Abel Cine Also In stock at: Charles Papert http://www.charlespapert.com/ info@charlespapert.com c) 323-350-8822, rep for TECADS he is a Steadicam operator lives in Los Feliz and can give all round good advice. Powerplug and special cables: there is a very unusual power plug on the Decimator. Look at it closely it is polarized with a little lip. You must align the lip on the plug with the hole on the receptacle for it to insert and hold!!! We make cables adapting to all cameras or fancy “Y” cables to Decimator and any transmitter. Most are $ 150.00 some more. Call we have most in stock. Wolf 310-822-4973. Note: The RedOne Camera sometimes (often) has a jitter in its HDSDI output. This is not cured by downconverting, only by a good “reclocker”. Folks prefer the AJA HD10DA because it works while the 3G version of the AJA DA has caused some operators problems. Others like the Black Magic. Signal Generator: http://www.decimator.com/products-3g-tpg.php $1200.00 not sure if there is a lower priced one available. Check out the Decimator Design (Redbyte Design) 3G-TPG Test Pattern Generator. All format HD/SD with moving pattern and embedded audio in SDI. SDI outputs only no HDMI or analog video. Battery powered for instant signal source anywhere on set especially handy for checking cables and monitors with a known signal. Blackmagic: http://www.blackmagic-design.com/products/miniconverters/ Have similar products, carefully check details, some say their products handle redone better. AJA makes them too. wolf (we rent these but not sell them)
  7. "major radio-interference" what did it sound like? "major radio-interference" like the stuff you hear on cheap cable TV lectures? or congress TV? CSPAN? prob PDAs carried by attendees..? coiled cables inside boompoles, ever so convenient are trouble... early Sennheisers had serious RF sensitivity, there was a manufacturers mod. if you had any kind of backup with you you can tell which part was the offending piece. make a recording available to this board and you will get good answers, not all this guessing. ALWAYS carry spare cables by a different manufacturer. skinny cables are suspect right out of the box. go back to the center and try new stuff..... shorter cables are better than long ones. I am guessing at an early Sennheissssser....... GUESSING you will have lost a client... Guessing don't get you tru a technical job for too long' and... All of Rwanda has good cell coverage on the main roads ( yes!) - near the cell sites you got a lot of RF, more than in the countries that have FCC like rules. wolf
  8. I have a freq chart with open freqs in LA that I can send to anybody who wants it. just write to me, its too big for this board. also: How to find good free channels anywhere? Switch your analog TV tuner thru all channels, cross out the ones with analog TV stations on them on the list. Don’t even try to use those. There is no way to recognize a digital channel with an analog tuner. The painful way to find digital channels on the air: Take the UHF transmitter close to end of range and have someone switch thru all channels while you watch tuner on matching channel. You will find some that are just bad. You may have a digital TV stations on those channels. Avoid those. Digital TV on your channel will not kill your transmission it just cuts your range in half. It’s not approved to use those channels. The smart way: Tune your digital TV through all used digital TV channels one by one, go to the TVs Properties and the menu will tell you the on-air channel they are transmitting on. Cross those off the list. Ch 37 is reserved worldwide for scientific astronomy. Not used. There are some channels in the big cities that have low power NTSC stations on them. These are not always on the air. 09/05/10 G Legal Newsflash: There is provision in the federal regulations now to use Video Assist transmitters with some restrictions with permission in the USA. Look at: Federal Communications Commission §74.870 47 CFR Ch. I (10-1-04 Edition) They ask the manufacturer to: include with a wireless assist video device information regarding the requirement for users to obtain an FCC license, the requirement that stations must locate at least 129 kilometers away from a co-channel TV station, the limited class of users that may operate these devices, the authorized uses, the need for users to obtain a license, and the requirement that a local coordinator (or adjacent channel TV stations, if there is no local coordinator) must be notified prior to operation. [68 FR 12772, Mar. 17, 2003, as amended at 68 FR 69331, Dec, 12, 2003] You may read the details regarding above at: http://edocket.access.gpo.gov/cfr_2004/octqtr/pdf/47cfr74.870.pdf http://edocket.access.gpo.gov/cfr_2008/octqtr/47cfr74.870.htm
  9. some thoughts http://wolfvid.com/datasheets/FAQ_CANON_7D_VideoAssist_Notes.pdf wolf
  10. http://news.bbc.co.uk/player/nol/newsid_7310000/newsid_7318200/7318249.stm?bw=bb&mp=wm&asb=1&news=1&ms3=54&ms_javascript=true&bbcws=2 and how to reproduce old recordings... wolf
  11. Mod3K and mod5K are the same RF animal. the 5K only has a decimator converting HDSDI to SD between its input and the input of the transmitter which is a standard old mod3K. Most 5K have less power than 3K because the guys making it don't know how to tune it and how to keep internal radiation down. To keep mods (and the powerful commercial TV stations) from desensitising your RF mikes front end it might help to have antennae cut to your frequency not the usual sharkfins that receive everything from 400-800Mhz. wolf
  12. NOTE: Today August 2010 I measured some of my Baluns in the shop: I was appalled, most were wired wrong (by the manufacturer) and the transformers did not seem to be working: DC was continuous on many BNC in to BNC out at the other side of the cable!! Good lord there is a lot of research needed!!! I have also received several credible reports from the field that proved that BNC grounds from input to output were continuous and this of course caused havoc and ground loops galore when plugged into different mains and different ground. This was especially obvious on complex HD shoots with several SD monitor islands powered by unknown AC sources on stages that turned out to be poorly wired and grounds in conduit were not maintained. The balun isolation is supposed to take care of this, but since the balun boxes were badly designed and wired they did not do their job. Someday I will test some good ones and post it here. OUCH This paper and its newer versions can be found at: http://wolfvid.com/datasheets/faq_cat5_cabeling_specs.pdf wolf ( it never ends)
  13. check this and most of all its links http://wolfvid.com/datasheets/Battery_watcher.pdf http://wolfvid.com/datasheets/Batteries_and_chargers.pdf wolf
  14. did a series of truck races with 7 RedOnes and 60 ( sixty) of the little ones. AAAArrrrrrrrgh - 7 transmitters to producers, two new video eng. (from LA)/camera operators + more "operators" from ( Kalamazoo) - one sleeze cheap Brazilian PM from LA who rented everything for a 6 day shoot on a one day rental with a credit card that was not even hers. Chi rental house, needless to say we checked out after the first weekend and let a 3 letter house in LA take over. --- the drama though, you can't even imagine............ budget, hold, rebudget, hold for sure, better deal, hold, compeditive bid, hold for sure, matching bid, hold again, .... CANCELL for the house that gave the one day rate... who needs this shit....
  15. want to roll your own: http://wolfvid.com/datasheets/Specials.pdf and meter your own http://wolfvid.com/datasheets/Battery_watcher.pdf and learn something http://wolfvid.com/datasheets/Batteries_and_chargers.pdf or buy the ready made PSC unit... what I MISS IN psc GEAR IS PRECISE SPECS AND PUBLISHED CIRCUIT DIAGRAMS - FOR SIMPLE GEAR LIKE THIS THAT CAN BE FIELD SERVICED. whats most important in large sound 12 V systems is to keep track of grounding wolf
  16. i can still tell insanely often when i talk to an ATT phone - it sound insanely bad insanely often, but there is a good reason to rent one of those computers: Performanceaudio.com http://www.performanceaudio.com/apps/ - Decibel Meter Pro: Sound level measurement (decibels) with analog & digital displays. - Bit Calc Pro: Quick and easy way to calculate drive space needed for recording. - Audio Atlas: Vast audio reference at your fingertips, with search feature. there is a tedious alignment tool for the audio level meter. I have seen other audio level meters with similar features. of course there are now 2 timecode slate displays. they run at a different speed (satellite time) than the 29.9 TC we generate but if there is nothing else it gets the editor in the ballpark. how can I live without Apple? HOW HOW HOW??? wolf :-) wolfvid.com
  17. Video Stroboscopy of the Vocal Cords more info http://www.voiceinfo.org/ amazing wolf
  18. updated to 14 pages... arrrgh This paper and its newer versions can be found at: http://wolfvid.com/datasheets/faq_cat5_cabeling_specs.pdf
  19. not small but bullet proof http://wolfvid.com/datasheets/Tuner_1041.pdf wolf
  20. revised 5D 7D info http://wolfvid.com/datasheets/FAQ_CANON_7D_VideoAssist_Notes.pdf wolf
  21. just think 23 years FOR THE VIETNAMESE TO GET THEIR COUNTRY BACK ( with russian high tech help) will we even be alive when the iraquis and afgahns get their place back?? and of course Pepsi Cola is well dug in in Vietnam today - and it's a capitalist economy selling oil to China - their other arch enemy. History does move slowly despite of idiotic silver tongued generals playing round robin. HA ! w.
  22. updated cat 5 FAQ can be found at: http://wolfvid.com/datasheets/faq_cat5_cabeling_specs.pdf
  23. check out the flatpanel sharkfin we sell (yea its an ad of sorts) http://wolfvid.com/datasheets/Antenna_UHF_flat_panel.pdf here is something I wrote for AM video reception - not really that different from SOUND FM ( pardon the lousy formatting) Log Periodics (SharKfins) compared We recommend for general use the WSV green flat panel Antenna. This is a high gain flat log periodic antenna. All antennae are good at short range. Where they differ is in the extreme end of range. In a bad multipath environment at short range, any directional antenna is better than a non-directional one. The omni rubber ducks are non-directional or omni directional. So if you can, use a directional antenna. The gray CIT ultra has a little more gain than the other three we tested: WSV aluminum, Lectrosonics flat panel, PSC flat panel and WSV green flat panel. In normal transmitting distances with a decent signal, there is no difference between these antennas. At low signal strength there are very subtle but discernable differences between the antennae and between cable types used. 50W black Belden cable is preferred. Generally, the CIT (gray) antenna is a little more sensitive to low level signals at high and low frequencies. This shows up on the DX-404 tuner as one or two additional LEDs lighting up. The WSV (green) antenna seems a little more sensitive to reflections from objects within 3 ft. of antenna. The Lectrosonics (black) and WSV (green) seem to be very similar otherwise. What this means in practical terms is: if you’re receiving a small transmitter at the end of a 100 yard football field, the CIT antenna would be good for 100 yards, whereas the others will be good for 98 yards. Again, this is splitting hairs at the extreme far end of the receiving range. The new DX-404 tuner seems to switch antennae without any color phase shifts in the picture. Relative position (where you put the antenna) is much more important than the exact direction you point it or the brand of antenna. So move your antennae 6" to left or right or up and down for best pictures. This demonstrates the radical effect multipath has on the signal. The reason the picture is bad 6" away from the original position is only multipath. So when you see a picture get bad, and then good, when one end of the transmission chain is moving, you are observing the different patterns of multipath. Therefore you should continuously experiment with better positions. The CIT antenna is very bad below channel 14. Our WSV Log Periodic is not as sensitive to accurate pointing. It has a wider pattern. With low signal strength use the side lobes (30° off center) rather than on axis. CIT is very sensitive to horizontal - vertical position. For best results, it has to be perfectly parallel (the same spatial plane) with the modulator’s antenna, especially at the higher channels. (This is the price you pay for the high gain.) WSV Log Periodic has slightly less gain than others but is much easier to point. Antennae in order of gain: CIT Ultra Antenna, Lectrosonics, PSC, and WSV. Remember to experiment with antennae positions all the time. The best solution is four antennae spaced by 3 ft. for the diversity receiver of course. Look at the artwork below and think a little. If the transmitter is vertical, the receiver also has to be vertical. Note the difference in vertical or horizontal radiation pattern. This is called phase of a transmitter signal. [img height=211 width=362]http://jwsound.net/SMF/file:///C:/DOCUME%7E1/HP_ADM%7E1/LOCALS%7E1/Temp/msoclip1/01/clip_image002.gif YAGI or Flat panel FOR RECEPTION · A Yagi is an antenna that looks like your rooftop TV antenna. Mount antenna on "C" (Century) stand up high (7 ft.) for safety sake. Reception is better the higher the antenna. Use our new stand extender (5ft). Single channel Yagis have several advantages that may be critical in difficult situations: · Selectivity: Some are tuned only for one channel only some for a few. The antenna will reject adjacent broadcast channels that are usually much stronger than low powered modulators. · Directivity: Front-to-back ratio is as high as 20 dB. The angle of acceptance of a signal is very narrow. This is especially noticeable at long range. Experiment with very small directional increments when pointing the Yagi. Hold antenna on central rod in rear if necessary. At short range directivity goes away but you can optimize reflecting signals (multipath) by rotating antenna to null out reflections. · The general TV type Yagis have gain forward and rejection of signals from the rear. · Make sure you mount it vertically polarized (opposite from what you see on most rooftops), matching modulators antenna orientation. · A good large Yagi if you really need range: http://www.antennasdirect.com/91XG_HDTV_antenna.html Needs with some good accessories. Antennas Direct, 1699 West 5th Street - Suite F, Eureka, MO 63025 877-825-5572 Antenna Distance vs. Cable Distance? Question: Is it better to place the Rx antenna far from the Tx and use a short 50Wlow-loss cable between the antenna and Rx tuner, or to have the Rx antenna close to the Tx and use a long 50Wlow-loss cable between the antenna and Rx tuner? Short Answer: It is always best to keep the Rx antenna close to the Tx, even if you have to use a 100 foot 50W low-loss cable to the Rx tuner. Why? You may lose 10db of signal in the long cable, but you benefit in Tx signal strength over interference and noise. The gain in performance is because the Tx is stronger than the background signals. Background signals may be off channel, but can still induce flicker and rolling pictures. So, 100 feet of cable is not the killer you always thought it was. ** Best Answer: Place the Rx antenna as close to the Tx as possible and mount the Rx tuner directly on your antenna stand while using a short 50Wlow-loss cable between the antenna and the Rx tuner. You can then run a 75W video cable up to 1000 feet from the video output of the tuner to your video assist recording system or monitor. [img height=357 width=350]http://jwsound.net/SMF/file:///C:/DOCUME%7E1/HP_ADM%7E1/LOCALS%7E1/Temp/msoclip1/01/clip_image008.jpg ** In general, it is best to use antenna cables that are no longer than 25 feet. If you still need to use a longer cable, then you should use a powered in-line signal amplifier. Using an antenna pre-amp like this will allow you to use either 50Wor dual 75Wcable up to 300 feet between the antenna and Rx tuner. An adequate device to use is the Radio Shack (yes, Radio Shack) model 15-1170, which runs about $50 w/tax and shipping. Online order only: http://www.radioshack.com/product/index.jsp?productId=2103913 Multipath AGAIN: [img height=146 width=193]http://jwsound.net/SMF/file:///C:/DOCUME%7E1/HP_ADM%7E1/LOCALS%7E1/Temp/msoclip1/01/clip_image010.jpg [img height=143 width=180]http://jwsound.net/SMF/file:///C:/DOCUME%7E1/HP_ADM%7E1/LOCALS%7E1/Temp/msoclip1/01/clip_image012.jpg Reception with no multipath Multipath looks like 2 images (moving!) CHOOSING THE best WHIP ANTENNA FOR TRANSMITTING An antenna is an antenna, is an antenna . . . correct? Actually, an antenna is just a radiator of RF signals, but there can be good ones, bad ones and ugly ones. The properties that make an antenna a sweet one are the same for receive or transmit. Omni antenna designs go from unity gain 0dB to 10dB and higher. The more gain, the further the reach. The higher the frequency, the shorter the antenna. The higher the gain, the longer the antenna. The higher the gain, the higher the radiation or receive pattern. Examples: UHF 3dB gain Antenna @ 470 MHz (TV Channel 14) is about 6” long; for 6dB gain, it is about 12” long. for 9dB gain, it’s about 36” long. The vertical radiation pattern of antennas vary according to design. For now, let’s assume similar design, just more or less gain. The simple description is that with little gain (3dB), the pattern resembles “Mickey Mouse ears.” The higher the gain, the more the pattern resembles a round pie. The higher the gain, the further the reach. If you are close and you have more gain than necessary, you are not wasting anything. Side View of Vertical Antenna [img height=166 width=437]http://jwsound.net/SMF/file:///C:/DOCUME%7E1/HP_ADM%7E1/LOCALS%7E1/Temp/msoclip1/01/clip_image014.jpg Choose the antennas you use with thought. Avoid using the 6” Rubber Duck antenna. They are the ugly black ones: not tuned, inefficient and ineffective. Conclusion: Longer antennas give more gain = better signal, less flicker, more range. We happen to be selling some custom made ½ wave whips. You can find the instructions for homemaking here Under: http://movies.groups.yahoo.com/group/VideoAssist/files/ A file called: whip.PDF you have to sign into the group, its easy and safe. Or: http://f1.grp.yahoofs.com/v1/UGx_SwmdVhBMCfAgDhXAVN9FwashtBiizi80RgjI1oNrO0vqJ7LvLwDuvsHVw35PtYPwb0G2VNcAXw-Knbie_tqO7hs-3t7qeTY/whip.PDF Dipole vs. Yagi vs. Log Periodic, What’s the difference? A dipole is the simplest antenna. The Radio Shack amplified box with rabbit ears is really a dipole. It receives from all directions equally. This is not good. You will be receiving reflected signals (result of multipath) as much as direct signals. These will cancel each other out and make the video look like a cheap ass rolling and flickering TV transmission. Advantage of Yagis and Log Periodics: they are directional. Yagis are tuned for one frequency (one channel) (±10MHz). Log Periodics work for a wide band of frequencies. (400-1000MHz or TV channel 14-69). For the same physical size as a log periodic, the Yagi has slightly more gain (up to 10dB). That means it may have 20% longer range (1200 ft. rather than 1000). The reception patterns are pretty similar, but the Yagi has a tighter pattern, therefore more gain. If you know you will be using one frequency only, you are better off using a Yagi. It acts like a filter and rejects all other signals (TV stations) that you don’t want. Unwanted signals make a mess out of your receiver’s front end (input stage) and show up as weird patterns or less sensitivity (less range). Of course in TV reception you never use Yagis, as you want to be able to receive lots of channels. Use a log periodic (flat panel) to receive: Advantages: covers all channels (14-69), pretty good directionality, therefore it’s better with multipath. Decent gain. Most important also are new, short, clean, low loss cables between antenna and receiver (or transmitter). Use half wave antenna for transmitters – always better than the ugly 6” black whip.
  24. I admire the computing power of the Iphone but always know when someone is trying to communicate on one... 30% of words are lost in the ATT ether wolf
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