[TenTec] Ten-Tec serivce

[Bwana Bob]

Don:

Thanks. Yes, I know what that is for. Without it when you work a 
repeater, sometimes on returning form transmit back to receive, the 
receive frequency jumps to the transmit frequency. As I recall the 
problem is caused by transient drops in the voltage at that point as a 
result of T/R switching. I put in this mod and it fixed the problem for 
me. I put in a 4.7 uf cap. I  when I heard about the mod, the value 
mentioned was 1 to 4.7 uf.

			73,

			Bob WB2VUF

  Don Bullard wrote:

> Bob,
> 
> The capacitor is a 1uF, 50V electrolytic.  It jumpers across resistor 
> R32 (10k) with the positive end going toward Q8.  R32 goes from ground 
> to the base of Q8.  Maybe it extends the reset signal to U4??  Not sure.
> 
> I would be interested in details on the other cap you added to reduce 
> the CTCSS level.  Thanks!
> 
> 73,
> Don W4IML
> 
> 
> 
>> Don:
>>
>> I'm curious. Where in the circuit did they add the capacitor and what
>> was the value of the cap? I might be similar to the capacitor that I
>> added to my 1220 to cure the excessive CTCSS tone level.
>>
>> 73,
>>
>> Bob WB2VUF
>>
> 
>