mateuf Posted November 4, 2011 Report Share Posted November 4, 2011 as i am looking for a bag based multicoupler for 4 ucr's , i am playing with the idea of disassembling a UMCWB and fitting the guts of this device in a sturdy custom housing with a footprint as small as possible. before i get out saw and driller, i wanted to ask around if someone of you planned or even successfully finished such a modification. greetings Quote Link to comment Share on other sites More sharing options...
Phil Palmer Posted November 4, 2011 Report Share Posted November 4, 2011 I have gutted a 6-pack and put the multi-couplers/power supplies in a bag along with the receivers. Not light, but it works for me. I don't really carry the rig that much, it's more of a mobile cart. Quote Link to comment Share on other sites More sharing options...
pvanstry Posted November 4, 2011 Report Share Posted November 4, 2011 or simply get a Mini-Circuit splitter ( the same recommended on the Lectrosonics site ) and a pair of Lectrosonics UFM250 rf amp. Same thing. Probably cheaper and much smaller. Also you would have the possibility of adjusting amplifer gain on the UFM but not on the UMCWB. Pretty cool for long cable run compensation. Pascal Quote Link to comment Share on other sites More sharing options...
LarryF Posted November 4, 2011 Report Share Posted November 4, 2011 You can buy the MinCircuit splitter and UFM 230 amp from a Lectro dealer and save yourself some money (yay!) over the UMCWB. You get exactly the same performance as a gutted UMCWB (yay!) and don't pay us as much (rats!). You will need an extra power cable and two extra very short BNC to BNC cables (meh!). Pascal's suggestion is the best way to go. I'll be glad to help with settings and details if you use the MiniCircuits. Cheers, Larry F Lectro or simply get a Mini-Circuit splitter ( the same recommended on the Lectrosonics site ) and a pair of Lectrosonics UFM250 rf amp. Same thing. Probably cheaper and much smaller. Also you would have the possibility of adjusting amplifer gain on the UFM but not on the UMCWB. Pretty cool for long cable run compensation. Pascal Quote Link to comment Share on other sites More sharing options...
studiomprd Posted November 4, 2011 Report Share Posted November 4, 2011 " I'll be glad to help with settings and details " that deserves another: yay ! Quote Link to comment Share on other sites More sharing options...
Boomboom Posted November 5, 2011 Report Share Posted November 5, 2011 Will a UFM230 fit block 470 units ? Quote Link to comment Share on other sites More sharing options...
LarryF Posted November 5, 2011 Report Share Posted November 5, 2011 Yes. http://www.lectrosonics.com/182-UFM230/View-details.html Order the low version (U.S.) 470-700 MHz. We make some versions that cover higher foreign frequencies. The U.S. version doesn't need to and it reduces interference from the sold off bands. Will a UFM230 fit block 470 units ? Quote Link to comment Share on other sites More sharing options...
Boomboom Posted November 5, 2011 Report Share Posted November 5, 2011 Nice Thanks Larry Pete Quote Link to comment Share on other sites More sharing options...
Boomboom Posted November 6, 2011 Report Share Posted November 6, 2011 For assembling, you'd need two splitters and two amps (one each per antenna) ? So if I want to plug 6 receivers (just an example) to two dipoles (same block Rxs) or sharfins, I'd need two UFM230 amps and two ZFSC843 splitters*** ? Also: using the low version of UFM, I'd be able to mount block 470 alongside blocks 20 to 22 on the same splitters, right ? (using sharkfins then ) Can't find a schematics of how everything gets plugged from receivers to antennas... *** Following the same logic: For two Rxs: ZSC24 For up to four Rxs: ZFSC41 Quote Link to comment Share on other sites More sharing options...
LarryF Posted November 6, 2011 Report Share Posted November 6, 2011 You seem to have everything down perfectly but here is a simple wiring setup, with each of two antenna paths designated A or B. Assuming the cable distances for a bag system are all very short, it is antenna "A" through a short cable to a UFM230. Then a short cable to the input of the A splitter (4 or 8 channel as you described) and then short cables to the antenna A input of each receiver. Antenna B is the same exact setup, of course, going ultimately to the B input on each receiver. Working backwards you see that each receiver has two independent paths, A and B, to the independent (spaced) antennas. This preserves the diversity action. Gotchas: If you have long antenna cable runs, such as 50 feet or more of RG8 or 9913 or if you have 25 feet of smaller cable, the UFM230 should (must) be near the antenna. Using the internal jumpers, select only (repeat only) enough gain in the UFM230 to make up losses between the UFM230 and the receiver antenna input. The losses to consider are long cables between the UFM230 and the splitter plus the inherent splitter losses. Figure 7 dB of loss for the 4 way and 10 dB of loss for the 8 way. For a two way, don't bother with the 3.5 dB of loss with the complication of an amp. Ignore connector losses. At these frequencies they are less than 0.15 dB. Best Regards, Larry F For assembling, you'd need two splitters and two amps (one each per antenna) ? So if I want to plug 6 receivers (just an example) to two dipoles (same block Rxs) or sharfins, I'd need two UFM230 amps and two ZFSC843 splitters*** ? Also: using the low version of UFM, I'd be able to mount block 470 alongside blocks 20 to 22 on the same splitters, right ? (using sharkfins then ) Can't find a schematics of how everything gets plugged from receivers to antennas... *** Following the same logic: For two Rxs: ZSC24 For up to four Rxs: ZFSC41 Quote Link to comment Share on other sites More sharing options...
Boomboom Posted November 7, 2011 Report Share Posted November 7, 2011 Thanks a very lot Larry ! Quote Link to comment Share on other sites More sharing options...
Ron Meyer Posted November 8, 2011 Report Share Posted November 8, 2011 We have a new product coming soon. At least as soon as I can get back on it and get it finished and into production. It will be called the PSC RF Multi SMA........also known as the "Scott Farr Special" Wide band UHF, built in remote antenna power (switchable), externally powered via a 4 pin Hirose. Price and delivery date to be determined. Hopefully I will have this into production by December of this year. Here is a photo of it: http://i784.photobucket.com/albums/yy123/psc4sound/psc%20equipment/rfsmafront.jpg best regards Ron Meyer PSC Quote Link to comment Share on other sites More sharing options...
ProSound Posted November 8, 2011 Report Share Posted November 8, 2011 Looks like a great addition to a sound bag Quote Link to comment Share on other sites More sharing options...
JDirckze Posted November 8, 2011 Report Share Posted November 8, 2011 Lovely. Nice work PSC! Quote Link to comment Share on other sites More sharing options...
Nate C Posted November 8, 2011 Report Share Posted November 8, 2011 Ron you have added one more toy to my christmas wish list. Exactly what many of us have been looking for. ...Now Santa I have been a good boy... truely... Quote Link to comment Share on other sites More sharing options...
John Steigerwald Posted November 8, 2011 Report Share Posted November 8, 2011 We have a new product coming soon. At least as soon as I can get back on it and get it finished and into production. It will be called the PSC RF Multi SMA........also known as the "Scott Farr Special" Wide band UHF, built in remote antenna power (switchable), externally powered via a 4 pin Hirose. Price and delivery date to be determined. Hopefully I will have this into production by December of this year. Here is a photo of it: http://i784.photobuc.../rfsmafront.jpg best regards Ron Meyer PSC Slick! Is it an active split? Quote Link to comment Share on other sites More sharing options...
Ron Meyer Posted November 8, 2011 Report Share Posted November 8, 2011 Slick! Is it an active split? Yes, each side has a low noise amplifer followed by a spliter. Basically you end up with unity gain Ron. Quote Link to comment Share on other sites More sharing options...
Alan H. Chang Posted November 8, 2011 Report Share Posted November 8, 2011 Finally! All those adapters and specially made cables were cumbersome. Quote Link to comment Share on other sites More sharing options...
Rob Beal Posted November 8, 2011 Report Share Posted November 8, 2011 That looks excellent, I've been toying with the idea of building a very similar box but I would gladly buy that instead! Would it be possible to order a 50MHz version rather than wideband? -Rob Quote Link to comment Share on other sites More sharing options...
Jack Norflus Posted November 8, 2011 Report Share Posted November 8, 2011 Ron, I am guessing that you will be selling SMA to BNC cables so you can use it with 411's? Quote Link to comment Share on other sites More sharing options...
mateuf Posted November 8, 2011 Author Report Share Posted November 8, 2011 so no need to trash a UMCWB ... :-) thank you all for mentioning some less destructive approaches ! this new tool from psc looks indeed very interesting... what range does its wideband filter cover, ron ? Quote Link to comment Share on other sites More sharing options...
Ron Meyer Posted November 9, 2011 Report Share Posted November 9, 2011 That looks excellent, I've been toying with the idea of building a very similar box but I would gladly buy that instead! Would it be possible to order a 50MHz version rather than wideband? -Rob Hi Rob, It will not be possible to have 50Mhz bands, sorry. Ron, I am guessing that you will be selling SMA to BNC cables so you can use it with 411's? We have a source for very nice pre-made cables of all types and lengths. I am not sure what we will be suppling as of yet. so no need to trash a UMCWB ... :-) thank you all for mentioning some less destructive approaches ! this new tool from psc looks indeed very interesting... what range does its wideband filter cover, ron ? The current pre-production unit is operating wide band......450Mhz to 950Mhz. Production units will be 470Mhz to 720Mhz Quote Link to comment Share on other sites More sharing options...
Dre Rivera Posted November 9, 2011 Report Share Posted November 9, 2011 i like this Ron... can't wait to see it on the market.. Quote Link to comment Share on other sites More sharing options...
pvanstry Posted November 9, 2011 Report Share Posted November 9, 2011 Wondering if PSC could make a 4 way version of the splitter? Quote Link to comment Share on other sites More sharing options...
Ron Meyer Posted November 10, 2011 Report Share Posted November 10, 2011 Wondering if PSC could make a 4 way version of the splitter? We are thinking about a 4 way version, but not until after the 8 way is finished. I am working on several projects right now as I am having to redesign a few of our older products due to parts going obsolete from the suppliers. Its taking up a great deal of my time at the moment. Ron Quote Link to comment Share on other sites More sharing options...
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