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Diego Sanchez

External antenna for Sennheiser G2

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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.

g3m1.jpg

 

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:
g3m3.jpg

 

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! :-)

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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?

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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.

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16 minutes ago, joi b said:

Did my first one today - 10 minutes with everything prepped

53250661_2007524876220387_357358896983048192_o.jpg

 

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.

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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?

IMG_5111.jpg

IMG_5113.jpg

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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). 

 

resistance.jpg

 

 

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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? 

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