[Drake] Low output on T4XC

[Garey Barrell]

Larry -

The INJection voltage is the difference between the Band Oscillator 
frequency and the PTO, as mixed by the Premixer.  Failure to work the 
"other way" still implicates any of the three.   George HAS "on 
frequency" output that he can hear in another receiver (mentioned in an 
earlier message), so all three oscillators and the Premixer are 
"working" in the T-4XC.  Just not enough Premix to the Mixer stage to 
drive the transmitter.  I think the problem is in the Premixer (V8).

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual
<http://www.k4oah.com>



Larry Taft wrote:

> George,
>
> Does the T-4XC PTO drive the R-4C?  If not I would suspect the output 
> of the PTO is bad.  I have repaired a couple of PTOs for no output in 
> the past.  Try tuning around the 5-5.5 MHz range with a receiver and 
> compare the R-4C to the T-4XC.   They should be approximately equal 
> strength as they are the same circuit.
>
> 73, Larry  K2LT
> drakerepair.com
> 800-687-9161
>
> At 10:56 PM 9/11/2005 -0400, you wrote:
>
>> And, finally,  if I switch to the R-4C for frequency control the 
>> T-4XC works perfectly!!!
>>
>> K4GM - George
>>