drakelist  

Re: [drakelist] T-4XC problem on CW

W8NJR
Fri, 04 Apr 2008 08:56:06 -0700

OK Garey the ground is there. The pots both check about 520K ohms across  the 
full windings and checking at the center terminal, the back pot checks  
0-520K ohms. The front pot nearest the panel checks 0-15K ohms across the full  
range. I must have a problem somewhere else.
 
                                                                Terry,  W8NJR
 
 
 
In a message dated 4/4/2008 11:11:24 A.M. Eastern Daylight Time,  
[EMAIL PROTECTED] writes:


Garey Barrell <[EMAIL PROTECTED]> made an utterance to the  drakelist  gang
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Terry  -

On CW the GAIN control varies a DC bias on the Balanced Modulator  diodes 
to "unbalance" them.  Perhaps that section of the GAIN control  has lost 
it's ground.  That section isn't used for any other  function.

73, Garey - K4OAH
St. Charles, IL

[EMAIL PROTECTED]  wrote:
> I have a T-4XC that works fine on SSB but when I switch to CW  and key 
> the transmitter, It has full or a lot of drive applied and  the gain 
> control has no effect or control over the drive. Has anyone  out there 
> run  into this before? I thought I would check before  I start looking 
> for the problem.
>  
>        Thanks,
>                      Terry 
> W8NJR
>   
>
>

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