vins Posted October 25, 2016 Report Share Posted October 25, 2016 Hi all, I have in the past used a Lectrosonics Mute switch with a SM/SMD transmitter for boom operator private line communications. I have now switched to all Zaxcom wireless and was wondering if anyone has/is using the mute with a zaxcom trx lt? What wiring is required for the mute to trx lt in place of the Lectrosonics REFUMCABLE? Or alternatively has anyone created a soft switch for a Zaxcom TRX LT? Thanks Steven Quote Link to comment Share on other sites More sharing options...
John Blankenship Posted October 26, 2016 Report Share Posted October 26, 2016 Zaxcom made a mute switch for their earlier, silver colored, transmitters. That series (TRX900 & TRX900AA) had contacts on the side that accepted a variety of adapters -- Stereo, Time Code, IFB, Mute, etc. -- that attached to the side. Quote Link to comment Share on other sites More sharing options...
vins Posted October 26, 2016 Author Report Share Posted October 26, 2016 Thanks John, all of my wireless are TRX LT. I've edited the original message to include the LT Quote Link to comment Share on other sites More sharing options...
Jack Norflus Posted October 26, 2016 Report Share Posted October 26, 2016 Zaxcom has the new TRXFB transmitter. This is basically an LT transmitter with a built in ERX IFB receiver. The TRXFB transmitter features a top mounted key that is user selectable to be a mute switch as well as other functionality Quote Link to comment Share on other sites More sharing options...
ao Posted October 26, 2016 Report Share Posted October 26, 2016 the trxfb would be larger than an trx lt. you can get a used trx900aa for $500, which would be more cost effective. mute switches for the trx900aa are still available. Quote Link to comment Share on other sites More sharing options...
Jack Norflus Posted October 27, 2016 Report Share Posted October 27, 2016 7 hours ago, ao said: the trxfb would be larger than an trx lt Slightly - but not much. Quote Link to comment Share on other sites More sharing options...
vins Posted October 27, 2016 Author Report Share Posted October 27, 2016 Thanks. I will probably end up getting one of those down the line. What's the estimated RRP? In the meantime, i have a mute and a multiple TRX that could fit the bill with a cable. I was hoping somebody had already made the cable and could advise me on the wiring cheers Steven Quote Link to comment Share on other sites More sharing options...
ao Posted October 30, 2016 Report Share Posted October 30, 2016 I believe the list is $1995. will confirm when I get invoiced for mine. Quote Link to comment Share on other sites More sharing options...
vins Posted August 18, 2017 Author Report Share Posted August 18, 2017 Just reviving this old thread as I'm still looking to use an Zaxcom TRX LT with the Lectrosonics mute switch. Has anybody successfully used the mute switch with another transmitter? I had a cable made with the same wiring as the Lectrosonics MCATA5MLEMO cable which is the adapter cable that Lectro makes to use a ta5 mic with the SSM transmitter with no luck. Does anybody have any thoughts? Cheers Steven Quote Link to comment Share on other sites More sharing options...
John Blankenship Posted August 18, 2017 Report Share Posted August 18, 2017 I looked up the Lectro wiring schematics and the adapter is not wired the same way the TA5 to Lemo adapters I made are. Mine are designed to work with all Lectro wiring configurations. You should ask Lectro which Lectro wiring this is designed to work with. Quote Link to comment Share on other sites More sharing options...
Glen Deakin Posted August 18, 2017 Report Share Posted August 18, 2017 Also doesn't ground have to be wired to shell for to work with zaxcom ? Quote Link to comment Share on other sites More sharing options...
vins Posted August 18, 2017 Author Report Share Posted August 18, 2017 Hi, yeah I did ask Lectro a while back about a wiring configuration and what they told me didn't work either. I've just had another look at the mute circuit diagram and I think I was missing that the switch looks like it needs 4v from pin 2 I'm guessing that this could be the wiring assuming I can take the 3.3v from the audio signal wire. ta5 pin 1- lemo 1 & shell ta5 pin 2 - lemo 3 ta5 pin 3 - lemo 3 On a Lectro they get this from the servo bias separately so it may not work properly. Also 4v vs 3.3v - hopefully it will be enough to power both the mic and the switch. I think the ground to the shell is just for better RF performance isn't it? Quote Link to comment Share on other sites More sharing options...
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