[ICOM] IC 725 Intermittant Transmit Failure

[Bruce]

Lee,
When you go to Tx does the light on the front panel turn red?
If it doesn't you probably have a PLL unlock condition due to bad 
trimmer cap or
cracked solder around the LPL loop circuit. To confirm LPL loop try 
going to 7.000 MHz
freq and try and Tx then move up to say 7.150 MHz, do you get Tx then?
Very hard to troubleshoot this way..
Bruce
At 07:43 AM 10/19/2006, you wrote:
>I have an IC 725 that intermittently (at an increasing frequency) 
>locks up and will not transmit rf when the PTT on different 
>microphones is pressed.  Relays click and the receiver switches, but 
>no rf appears at the output.  This condition can be eliminated 
>temporarily by cycling the radio off and then on again.
>
>The radio has had little or no use in the past ten years until 
>recently.  The symptoms maintain despite changing antenna systems, 
>microphones, and even power supply cables.  Nothing regains 
>operation (switching bands, randomly punching every front panel 
>control, etc.) except cycling the power switch off and then on.
>
>Any one know what the cause might be?
>
>73 de Lee
>KM4YY/8
>
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