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Message |
    
Grandtimes
New member
Username: Grandtimes
Post Number: 1
Registered: 9-2005
| | Posted on Sunday, September 04, 2005 - 1:27 pm: | 
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The receiver amp works fine but the power/transmit circuit just squeels when I key up. I can transmit fine with the power off. My radio is a Uniden and I've run power direct from battery with 14ga. wire. I have schematics and parts list. Any ideas? Thanks. |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 1385
Registered: 7-2004
| | Posted on Sunday, September 04, 2005 - 1:45 pm: |
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start with swr's, then check radio output. TS should be fine with swr's under 2:1(though cutting into longevity possibly) & dead key should be under 4 watts. both together being high could cause trouble as well. also could be jumper cable problem; too short, no good, etc. |
Slowhand
Member
Username: Slowhand
Post Number: 68
Registered: 7-2005
| | Posted on Monday, September 05, 2005 - 11:25 am: |
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After you check everything he suggested, if you still have the problem. Ground the amp to the vehicle with a short wire. 12 or 14 gauge is fine. You can use a screw on the cover if you like. Make the wire no longer that 12inches. Make sure your radio is grounded through the mount. Make sure you didn't mount it to plastic. If it isn't grounded, put a short wire on it too.
Also don't use those armored microphone cables.
Put clamp on chokes or one of coppers filters on amp and radio leads. Make sure you amplifier leads and radio leads aren't cut to a reasonant length like 102" |
Bigbob
Senior Member
Username: Bigbob
Post Number: 2178
Registered: 12-2001
| | Posted on Monday, September 05, 2005 - 1:08 pm: |
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And if your antenna sees the mike cable solder a .01 cap across the audio and shield at mike socket and inside the mike.Bigbob |
Slowhand
Member
Username: Slowhand
Post Number: 69
Registered: 7-2005
| | Posted on Monday, September 05, 2005 - 3:25 pm: |
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Good idea bigbob, just check your audio quality afterwards, sometimes that will attenuate the highs. |
Grandtimes
New member
Username: Grandtimes
Post Number: 2
Registered: 9-2005
| | Posted on Tuesday, September 06, 2005 - 1:40 am: |
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All right, thanks. It'll probably take me a little while to test all of that but I'll get back with the results. |
Grandtimes
New member
Username: Grandtimes
Post Number: 3
Registered: 9-2005
| | Posted on Thursday, September 15, 2005 - 5:32 pm: |
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It just needed a better ground. |
