[Drake] Fw: T-4XB Problem

[GGLL]

	De nada (You're welcome).
QRV
Guillermo - LU5WE.

El 12/12/13 00:18, Larry Yates escribió:
>
> ----- Original Message ----- From: "Thomas Webb" <sam9lives1 at verizon.net>
> To: "'Larry Yates'" <larry_d_yates at bellsouth.net>
> Sent: Wednesday, December 11, 2013 8:45 PM
> Subject: RE: [Drake] T-4XB Problem
>
>
> Guillermo:  I will check this.  Gracias.  Tom  W4YOK
>
> -----Original Message-----
> From: Larry Yates [mailto:larry_d_yates at bellsouth.net]
> Sent: Wednesday, December 11, 2013 8:38 PM
> To: Tom Webb
> Subject: Fw: [Drake] T-4XB Problem
>
> Here is #1
>
>
> ----- Original Message ----- From: "GGLL" <nagato at madryndigital.com.ar>
> To: "Drake" <drake at mailman.qth.net>
> Sent: Wednesday, December 11, 2013 8:18 PM
> Subject: Re: [Drake] T-4XB Problem
>
>
> I would start checking the carrier crystal oscillator;  when in Tune,
> C1 (10 pF) is shortcircuited, but inserted in series with the crystal in
> CW mode, to raise frequency 1 KHz.
>
> Perhaps C1 is bad, do you hear a steady beat tone (at another receiver)
> when either cold or after 20' operation?.
>
> Regards
> Guillermo - LU5WE.
>
> El 11/12/13 22:58, Larry Yates escribió:
>> I am posting this for a friend of mine, Tom Webb, W4YOK.  If anyone
>> has incurred this problem before and was able to solve it please let
>> me know or you can email him at: sam9lives1 at verizon.net.  He has been
>> struggling with this problem for a while now.
>>
>> Thanks, Larry Yates WA4PMA
>>
>>
>>
>>
>> T-4XB PROBLEM
>>
>> Turn transmitter on.  Turn Function switch to "Tune" and tune up
>> normally. Power output is 90 watts, normal.  Switch to X-CW and close
>> the key.  Power output is 20 watts.  After 20 minutes, power output
>> is normal 100 watts. Power comes up gradually, no matter whether key
>> is open or closed during interim. Plate current starts out low, rises
>> to normal.
>>
>> All tubes have been replaced with NOS tubes.  All tube voltages are
>> correct both before and after warmup.  All resistors in the final
>> circuit have been checked.  Problem occurs on all bands. Dummy load
>> or outside antenna.
>> ______________________________________________________________ Drake
>> mailing list Home: http://mailman.qth.net/mailman/listinfo/drake
>> Help: http://mailman.qth.net/mmfaq.htm Post:
>> mailto:Drake at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email list: http://www.qsl.net/donate.html
>>
>>
> ______________________________________________________________
> Drake mailing list
> Home: http://mailman.qth.net/mailman/listinfo/drake
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Drake at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
>
>
>
>
>