Problem w/6400 and PTT

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  • Question
  • Updated 4 months ago
  • (Edited)
On a previous post, I indicated that my 6400 was having issues transmitting with the included stock mic. Well after further review, it might be a PTT issue.

I purchased a PTT switch and hooked it up to the RCA PTT jack on the back of the 6400. Currently I can transmit via my PC headset by clicking the MOX button and it works fine. However, pressing the PTT switch I connected, it is doing the exact same as the stock mic which was connected to the same PTT jack. No audio or modulation during transmittion. Am I missing a setting? Or is there a potential hardware problem?

Any Ideas?

Thanks!
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Barry Young

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Posted 4 months ago

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Winston VK7WH

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Have you checked your TX settings are set to enable?

Settings - Radio Setup - TX - RCA TX 1,2,3

I have a 6700 but your rig should be similar
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Barry Young

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Thank you for the reply.

They are all enabled and set to value of zero.
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Dudley - WA5QPZ, Elmer

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If you MOX button keys the radio, then the rear PTT , should also work, time to turn in HelpDesk ticket , http://helpdesk.flexradio.com .
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Barry Young

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Thank you I will do that..
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Rick Hadley - W0FG

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I had a similar intermittent problem, and solved it with a very slight squeeze of the RCA barrel using a set of pliers. It apparently wasn’t making solid contact.
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Barry Young

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The PTT triggers, and the radio goes into transmit mode, just no modulation as it does via MOX. I opened a help desk issue. I don’t want to do anything that might void the warranty.

Thanks!
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Steve K9ZW, Elmer

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 Check that the Microphone selection (Mic/Bal....) matches how you have it wired. 

GL & 73

Steve K9ZW