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Date: | Wed, 6 Jun 2012 07:29:27 -0400 |
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It will depend on whether those final amplifier tubes are running in Class
AB1, AB2, or B. This depends on the idling plate current vs. the key-down
plate current. Higher efficiency (lower idling current, operating the tubes
closer to cut-off) increases the distortion of your signal, which is
unimportant for CW but quite important for SSB. I would guess that you are
talking 50 percent efficiency (ratio of power output to power input). Not
all of the enpower is lost in the tubes, though. A little of it is also
lost in the pi network output circuit. I would probably adjust the plate
tuning and loading controls for maximum power output and leave it at that.
I assume you're not trying to run this station remotely.
Lloyd Rasmussen, Kensington, Maryland
Home: http://lras.home.sprynet.com
Work: http://www.loc.gov/nls
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Michael Ryan
> Sent: Wednesday, June 06, 2012 6:44 AM
> To: [log in to unmask]
> Subject: Plate dissipation VS output power
>
> Hi all:
>
> Is a rule of thumb to compare plate dissipation to actual output power?
> IE: My FT-102's 3 6146s can safely dissipate 105W between the 3, 200w out
> on SSB and 160 CW. So if I'm running my max CW, whats the plate
> dissipation of the tubes?
>
> TNX & 73:
> Michael De VO1AX
>
> Sent from my iPhone
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