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Topic: Microphone issue (Read 1993 times)
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WD8BXS
alter Hase
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Posts: 286
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Microphone issue
« on: 06. March 2018, 17:28:07 »
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All is going well with the 140, except when I insert the microphone. This is the same mic I use with the mchf.
When inserted, the radio goes crazy. If I press PTT it transmits just fine, but when I let go, it goes crazy again.
Will this board not work with the same mic as the mchf??
Chuck WD8BXS
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 Logged
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Thanks,
De WD8BXS vy 73
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WD8BXS
alter Hase
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Posts: 286
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Re:Microphone issue
« Reply #2 on: 06. March 2018, 17:34:21 »
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Are you familiar with the mics we are using on the mchf? AS I said when I PTT the mic works, it is just in standby that the radio keys very fast.
So you believe it is the wrong mic?
Chuck
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Thanks,
De WD8BXS vy 73
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WD8BXS
alter Hase
Offline
Posts: 286
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Re:Microphone issue
« Reply #4 on: 06. March 2018, 18:22:50 »
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OK, Then there must be a problem, the radio should not go crazy from just plugging in the mic.
Could the D6 being faulty have anything to do with this?
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Thanks,
De WD8BXS vy 73
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WD8BXS
alter Hase
Offline
Posts: 286
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Re:Microphone issue
« Reply #6 on: 09. March 2018, 23:24:29 »
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I have replaced D6, and now the CW paddles work fine. I still have the issue with the PTT line, If I insert the mic while the radio is in CW, it starts sending dashes. If I insert the radio in SSB, it starts keying off and on very fast. I can duplicate this just by manually keying the radio with a jumper at the mic jack!
Any more ideas?
If there was a ground somewhere on the board, I think it would be keying all the time, not just with the mic plugged in.
I can take the same mic, plug it into the mchf and it works just fine.
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Thanks,
De WD8BXS vy 73
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