Sal Posted June 12, 2017 Report Share Posted June 12, 2017 Late to the party but here is a video: Quote Link to comment Share on other sites More sharing options...
VacekH Posted February 11, 2018 Report Share Posted February 11, 2018 On 29. 3. 2016 at 5:59 PM, sisal said: I did the same about a year ago and I am very happy with it. Using proper SMA whips with G3 gives me a lot more range. Now I get the first hits where previously the connection would already have dropped completely. The receiver switches antennae seamlessly, and I get equal level on both of them. For the first set I used connectors from RS: http://au.rs-online.com/web/p/sma-connectors/5120036/ To mod the rest of my sets I ordered some cheaper connectors from ebay (like these). I cannot make out any difference. Do not forget to connect ground for the second antenna. Other than the hole for the second antenna, there was absolutely no change to the case. Should I ever feel like reverting to original, its just popping the SMA out and the regular one in. Using these connectors, you would have to remove a tiny bit of material to fit the original antenna bay: Hi Sisal, really nice work. Thinking about the same mod now. I have few questions. How did you connect the second antenna? Did you unconnect the wire going from the antenna output on the PCB to the Jack connector? Did you connect that unused wire on the Jack to the ground or where? Thanks much! :-) Quote Link to comment Share on other sites More sharing options...
alidav Posted November 25, 2018 Report Share Posted November 25, 2018 can you combine more g3s with 1 or 2 directional shark antennas? How do you power the booster? Quote Link to comment Share on other sites More sharing options...
Allen Rowand Posted December 1, 2018 Report Share Posted December 1, 2018 Finally joined the club! First walk test was very encouraging, had full strength RF through a couple walls. Next stop, log periodic antenna and splitter… Quote Link to comment Share on other sites More sharing options...
fatfatjames Posted March 4, 2019 Report Share Posted March 4, 2019 Does the length of the cable from the sma to the board,make a different to the length of the antenna? Quote Link to comment Share on other sites More sharing options...
joi b Posted March 7, 2019 Report Share Posted March 7, 2019 what type of wire do you use for the pcb to sma link? Quote Link to comment Share on other sites More sharing options...
Derek H Posted March 8, 2019 Report Share Posted March 8, 2019 I think just about anything would be fine. Pretty sure I clipped a lead from a 1/4 watt resistor and used that with a little shrink. On 3/3/2019 at 10:34 PM, fatfatjames said: Does the length of the cable from the sma to the board,make a different to the length of the antenna? I don’t think so. The case acts as a ground plane so I’m pretty sure that means the only length that’s critical is the antenna length protruding from the SMA whip. Someone else want to weigh in on that? Quote Link to comment Share on other sites More sharing options...
Allen Rowand Posted March 8, 2019 Report Share Posted March 8, 2019 On 3/3/2019 at 8:34 PM, fatfatjames said: Does the length of the cable from the sma to the board,make a different to the length of the antenna? I'm no LarryF, but I think you're fine as long as you keep the lead from the SMA to the board reasonably short. 4 hours ago, joi b said: what type of wire do you use for the pcb to sma link? I used a scrap of thin 50 ohm coaxial cable. I cut the center conductor free from the outer jacket and shield; you can see it in my post in this thread, #104. As Derek H pointed out, it doesn't have to be anything fancy. Just make sure the antennal lead can't short to ground. Quote Link to comment Share on other sites More sharing options...
joi b Posted March 12, 2019 Report Share Posted March 12, 2019 Did my first one today - 10 minutes with everything prepped Quote Link to comment Share on other sites More sharing options...
Allen Rowand Posted March 12, 2019 Report Share Posted March 12, 2019 16 minutes ago, joi b said: Did my first one today - 10 minutes with everything prepped One of the great things about this mod is you can use right angle SMA adapters to keep the antenna vertical when you mount the receiver in a camera's cold shoe. Quote Link to comment Share on other sites More sharing options...
Texasbelch Posted March 16, 2019 Report Share Posted March 16, 2019 I've modded my transmitter and receiver. While checking the antenna on the transmitter with my multimeter, I noticed that the antenna contact on the board is grounded with the case (meaning when set to continuity, touching one probe to the antenna connection point on the circuit board and the other probe to the case, it registers a connection). For the life of me, I can't see any stray blobs of solder. Is the transmitter antenna supposed to be grounded? Quote Link to comment Share on other sites More sharing options...
Derek H Posted March 18, 2019 Report Share Posted March 18, 2019 What’s the resistance in ohms? Quote Link to comment Share on other sites More sharing options...
Mattias Larsen Posted March 26, 2019 Report Share Posted March 26, 2019 For anyone that has done the mod with 2 antennas, do you experience that it is more reliable than the single antenna mod? Quote Link to comment Share on other sites More sharing options...
Texasbelch Posted April 4, 2019 Report Share Posted April 4, 2019 Hi Derek H, Sorry, I must not have turned on "notify me of replies." The measured resistance is 2.4 ohms (if I'm reading this correctly). Quote Link to comment Share on other sites More sharing options...
alidav Posted April 5, 2019 Report Share Posted April 5, 2019 On 3/12/2019 at 9:58 PM, Allen Rowand said: One of the great things about this mod is you can use right angle SMA adapters to keep the antenna vertical when you mount the receiver in a camera's cold shoe. QUANT On 3/12/2019 at 9:58 PM, Allen Rowand said: One of the great things about this mod is you can use right angle SMA adapters to keep the antenna vertical when you mount the receiver in a camera's cold shoe. WHAT IS THIS connector, has it been crimped? Quote Link to comment Share on other sites More sharing options...
Allen Rowand Posted April 6, 2019 Report Share Posted April 6, 2019 $5 for a pair at Amazon. Quote Link to comment Share on other sites More sharing options...
zerascal Posted April 6, 2019 Report Share Posted April 6, 2019 or you could buy the awesome Sma whip swivel jointed antenna from Audioroot: https://www.ebay.com/itm/UHF-SMA-WHIP-SWIVEL-JOINTED-ANTENNA-450-900-MHz/221539398514?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20180816085401%26meid%3Dad16a4f588304a1f8c1668a7f47ee662%26pid%3D100970%26rk%3D1%26rkt%3D2%26mehot%3Dpp%26sd%3D221539398514%26itm%3D221539398514&_trksid=p2481888.c100970.m5481&_trkparms=pageci%3Adace4bfe-587d-11e9-a9d8-74dbd1807197|parentrq%3Af331bf7b1690ac3df2c8b821fff66ea2|iid%3A1 Quote Link to comment Share on other sites More sharing options...
Long Pate Posted June 1, 2019 Report Share Posted June 1, 2019 Plzzz teach for me do that my email : pate.long@gmail.com FB: long.pate@yahoo.com Quote Link to comment Share on other sites More sharing options...
alidav Posted June 1, 2019 Report Share Posted June 1, 2019 On 12/1/2018 at 10:07 PM, Allen Rowand said: Finally joined the club! First walk test was very encouraging, had full strength RF through a couple walls. Next stop, log periodic antenna and splitter… my walk test failt 2 times, it was worse than the stock antenna, can depend from connector quality and cable to connect to the board? Quote Link to comment Share on other sites More sharing options...
Allen Rowand Posted June 2, 2019 Report Share Posted June 2, 2019 Can you post pictures of your receiver? Make sure that the antenna is fully seating in the SMA connector, too. Quote Link to comment Share on other sites More sharing options...
alidav Posted June 2, 2019 Report Share Posted June 2, 2019 I've replaced the stock antenna again. Quote Link to comment Share on other sites More sharing options...
Kirill Belousov Posted June 2, 2019 Report Share Posted June 2, 2019 2 hours ago, alidav said: I've replaced the stock antenna again. You mean from SMA antenna back to stock or from stock to SMA? Your sentence is quiet confusing. Quote Link to comment Share on other sites More sharing options...
alidav Posted June 3, 2019 Report Share Posted June 3, 2019 9 hours ago, Kirill Belousov said: From SMA antenna back to stock. Quote Link to comment Share on other sites More sharing options...
AbsoluteAaron Posted June 21, 2019 Report Share Posted June 21, 2019 I took the plunge with the 2 antenna setup on one of my Sennheiser receivers but it doesn't seem to work. To the person who posted a success with this mod - Did you remove the bracket connecting the sleeve of the audio jack from the second antenna input? Hard to tell from the pictures. I've tried this a few different ways and can't seem to get anything that appears to work differently from the single antenna mod. I thought about it and it seems that in it's original form, the whip doesn't have a ground connection since it is mounted with that rubber boot. The sleeve of audio jack must complete the circuit. Meaning, the actual antenna would be the positive pole and the audio cable would be the negative. This makes me wonder if the two antenna connection points are opposite in polarity. In which case, a 2 antenna setup shouldn't work as two antennas connected side by side would have a canceling effect. However, people have claimed to successfully execute this mod so I'm curious to hear more specifics on it. Thanks, -Aaron Quote Link to comment Share on other sites More sharing options...
sisal Posted June 25, 2019 Report Share Posted June 25, 2019 On 6/21/2019 at 2:58 AM, AbsoluteAaron said: To the person who posted a success with this mod - Did you remove the bracket connecting the sleeve of the audio jack from the second antenna input? Hard to tell from the pictures. I've tried this a few different ways and can't seem to get anything that appears to work differently from the single antenna mod. Yes you must remove the latch connecting to the minijack. The default setup uses the connected audio cable's sleve/shielding as the diversity antenna. If you leave the latch connected, and for example connect an LPDA, you destroy the antenna's anatomy by leaving the audio jack connected, you basically tap in between two antennae (one of which is slightly suboptimal by design). On 6/21/2019 at 2:58 AM, AbsoluteAaron said: I thought about it and it seems that in it's original form, the whip doesn't have a ground connection since it is mounted with that rubber boot. The original whip does not need a ground connector, since it is not set off the device. The device itself is acting as the ground plane to the whip. The "antenna" starts where the signal-carrying wire leaves the shielding. With the original whip antenna, this is where it exits the device case. If you intend to use a remote antenna (dipole, LPDA, helix or whatever), you must carry the ground plane to the antenna, therefore connecting it to the device case. On 6/21/2019 at 2:58 AM, AbsoluteAaron said: The sleeve of audio jack must complete the circuit. Meaning, the actual antenna would be the positive pole and the audio cable would be the negative. No, the audio cable's sleeve is the second antenna, the device case is the ground plane. On 6/21/2019 at 2:58 AM, AbsoluteAaron said: This makes me wonder if the two antenna connection points are opposite in polarity. In which case, a 2 antenna setup shouldn't work as two antennas connected side by side would have a canceling effect. The Sennheiser G2/G3 do not use "true diversity", they do not intermix the antenna signal. That's a feature for the more expensive units. The G2/G3 just switch between the two antenna inputs when the Signal drops below a preset threshold. You cannot get any kind of antenna polarity issue on this device. Btw, you should see that the latch is missing here: Kindly, sisal Quote Link to comment Share on other sites More sharing options...
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