President lincoln mk1 tx audio coming through speaker

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tony2803
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President lincoln mk1 tx audio coming through speaker

Post by tony2803 »

Got a slight problem with my mk1 lincoln.
When transmitting on am.fm.ssb i get feedback coming through the speaker. The radio is putting out 10 watts am.fm and 21 watts ssb.
Does anyone have a solution to resolve this problem.
Thanks in advance.
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ch25
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Re: President lincoln mk1 tx audio coming through speaker

Post by ch25 »

WE ARE MOTÖRHEAD, AND WE PLAY ROCK N' ROLL
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astradyne
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Re: President lincoln mk1 tx audio coming through speaker

Post by astradyne »

The first run of the 2830's and Lincoln's all had this issue. Not sure if it was an intentional function or a manufacturing/design issue, but by the time the Philippines made radio's came out the problem of TX audio coming through the speaker had been resolved.
Never, ever, ever....bloody anything ever!

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163TM847
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Re: President lincoln mk1 tx audio coming through speaker

Post by 163TM847 »

I have done the 10k resistor and 1n4148 diode in series to pin 6 of the audio amp many times and it works fine.
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tony2803
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Re: President lincoln mk1 tx audio coming through speaker

Post by tony2803 »

Thanks for all the replies. Waiting for parts to arrive will post results.
tony2803
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Re: President lincoln mk1 tx audio coming through speaker

Post by tony2803 »

Just finished mod 3. Tested and it works perfectly.
Thanks all for imfo.
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