[Drake] Low output on T4XC

[Larry Taft]

Hmmmm!

Does the T-4XCX work on other bands?  That would then lead to a weak band 
xtal, or band switch contact, or parts related to that area.  I have seen 
all of those failures.  Learning experience aka working for less than 
minimum wage.

Larry

At 11:00 AM 9/13/2005 -0400, you wrote:

>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
>______________________________________________________________
>Drake mailing list
>Home: http://mailman.qth.net/mailman/listinfo/drake
>Help: http://mailman.qth.net/mmfaq.html
>Post: mailto:Drake at mailman.qth.net
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Anti-Virus.
>Version: 7.0.344 / Virus Database: 267.10.23/99 - Release Date: 9/12/2005
>
>
>
>
>
>-- incoming mail is certified Virus Free.
>Checked by AVG Anti-Virus.
>Version: 7.0.344 / Virus Database: 267 - Release Date: 9/13/2005



-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.10.23/99 - Release Date: 9/12/2005