[Amps] Centurion plate current issue

[Patrick Barthelow]

Hi Gary,

 

Just BE CAREFUL, jumping in and out of the RF Deck, Discharging B+, etc,  while hot, or not hot, checking for heat and such on the plate caps....In fact, would not be a bad idea to have a fellow ham looking over your shoulder while planning and executing EACH successive hands-on step of the investigation of the RF Deck...

We want lots of future contributions from you to AMPS!

Best Regards,   
73, de Pat Barthelow AA6EG
 
> From: wa6fgi at sbcglobal.net
> To: amps at contesting.com
> Date: Wed, 9 Jun 2010 16:35:07 -0700
> Subject: [Amps] Centurion plate current issue
> 
> Hi to the group:
> 
> Finally got around to taking off the cover (excess of twenty screws) removed both tubes from sockets and switched the amp on. No plate current draw. Good. Was suggested by TenTec to insert tubes one at a time and check plate current.
> 
> Did that, plate current draw with either tube in place is 175 ma or so.
> 
> Is there any way to check (with ohmmeter) for internal shorts? Which pin to what particular pin?
> 
> I `spose anything is possible but both tubes going bad at same time?
> 
> When checking the tubes, had the HV on for maybe no more than 30 seconds or so, aluminum heat dissipaters on the tube(s) was extremely hot to the touch.
> 
> Fwiw, tubes are RF products house brand. If I need new ones, any difference form RF house and Taylor's?
> 
> looking of some ideas on this one (some more),
> 
> 73, Gary...wa6fgi
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