[Elecraft] qsk options inquiry

[Brendan Minish]

On Wed, 2009-08-12 at 16:50 -0300, cx7tt at 4email.net wrote:
> I have the Acom 1000

...snip... 
> this is
> a remarkable little amp, very quiet and puts out about 600w or so. It is
> NOT a 1000w amp...the specs on the tube the 4CX800 say plate dissipation
> is 800w...plug in typical efficiency and that will put it down around
> 600wto 680w....My LP-100 shows 800w peak and my Bird shows around
> 600-650w (key dwn) output into Steppir 3 ele yagi.

I have run my Acom1000 at a measured 1kw out on 6m for JT6M, this is a
high duty mode (100% keydown, 1 minute on & 1 minute off) which is, I am
sure pretty hard on tube life but no issues so far where the tube is
concerned. I have had this amp since late 2001 so it's an early model.  
The ACOM 1k runs hot but well within it's rated temp ratings @1Kw high
duty cycle. Keep the dust filter at the back well cleaned and ensure
that the exhaust vent is free. 

I measured a little over 1100 watts into a Dummy load on most bands.
My measurement is based on a Dummy load and an LP-100 calibrated against
a Rohde & Schwarz power sensor borrowed from work 

the power meter on the acom 1k can be a little optimistic, reading
around 1300W for 1050W into the dummy load ;-) 

if you are only getting ~ 600W out of your Acom 1k you may want to
check that the transformer taps are set correctly for your line voltage
and that your shack supply is not 'sagging' too much on keydown 

73
Brendan EI6IZ 
-- 
73
Brendan EI6IZ