[Drake] T4XC Power Switch Question

[ed]

My off the cuff guess, Paul, is a low-activity crystal  (carrier or 
filter crystal) or poor alignment of the filter/carrier osc.  The 
switching to Tune gives it the 'jump' it needs to start oscillating. 

Have not had that problem with my Drake T4XB.  However, had precisely 
that problem with an old Kenwood TS-520.  A bit of adjustment to the 
carrier and sideband crystals resolved the problem.   The TS520 would 
not even oscillate in the low-power Tune position, but would in the high 
power CW position.   The principle is the same, even in the Drake.  Cost 
nothing but an hour or so of time to repair it.

I would not go replacing difficult things until I had exhausted other 
possibilities.

Ed, W5HTW




Paul Blumhardt wrote:

>My T4XC power switch has a problem.
>
>The Transmitter won't come on when the Mode switch is switched from "Off" to
>"SSB".
>
>You have to turn the switch (past "SSB") to "Tune", then back to "SSB".
>
>Questions for the group:
>
>1. Could the switch itself be misaligned somehow? (I can't see how...)
>
>2. Is a replacement power switch module available? (It mounts on the back of
>the Mode switch)
>
>
>Thanks
>
>VY 73
>Paul K5RT
>
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>  
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