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Markll
Mar 27, 2009 21:11:26 GMT -5
Post by 238 on Mar 27, 2009 21:11:26 GMT -5
Have 2 receivers. 1 receives good. The other 1 acts like the squelch is on all the time. Changed the tubes out of a working receiver but did not help. 238
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Markll
Mar 28, 2009 12:46:41 GMT -5
Post by gator7 on Mar 28, 2009 12:46:41 GMT -5
Two things that are areas to look at would be the squelch control or the RF gain control may have gone bad. These are someplace to start looking into. I assume you see to signal on the meter. But no audio? You may have a audio amp issue also. I am just guessing here. Some of the Tech's on this site can be of better help. Good luck.  |
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Markll
Mar 30, 2009 19:21:32 GMT -5
Post by 238 on Mar 30, 2009 19:21:32 GMT -5
It has audio, it just acts as if the squelch is on.
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Markll
Mar 30, 2009 23:26:06 GMT -5
Post by 2600 on Mar 30, 2009 23:26:06 GMT -5
Check R54, a 100k 1-Watt resistor behind the 12AX7 socket. One side should be about 230 Volts DC. The other side should be close to 50 Volts. Since R54 is a carbon-composition resistor, its value can drift with age and heat. We replace it with a 2-Watt part when it checks bad.
And this may have nothing to do with the problem. Just a shot.
Bad squelch pot is a possibility. Doesn't happen a lot.
73
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Markll
Apr 6, 2009 18:59:39 GMT -5
Post by 238 on Apr 6, 2009 18:59:39 GMT -5
One side has 360volts dc, the other side is 68 volts dc. It checks 68K. When i get back in i will change it an see if it makes a difference. 238
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Markll
Apr 8, 2009 20:03:01 GMT -5
Post by 238 on Apr 8, 2009 20:03:01 GMT -5
Changed the r54, but the volts stayed the same. All i had was a 110k resistor.
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Markll
Apr 11, 2009 14:40:23 GMT -5
Post by 2600 on Apr 11, 2009 14:40:23 GMT -5
Have you checked the squelch control?
73
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