Hello Carl,
Well the spec says the max volts on the anode should be 2400, so maybe
Heathkit decided to save the valves a little. The HT supply has been
re-built.
My mistake next...... On the FT-1000MP you can adjust the 'Tune'
output power in steps 10/50/100. Mine was set to 50w, so pushing the
tune button on the remote meant that I was only using 50w to tune the
amp and giving me a lower output than I should have been seeing and I
didn't notice this. The output now with a bit more input is about what
you're seeing.
The input swr has been dealt with and I get nearly 1:1 on all bands.
Wednesday, September 21, 2005, 12:37:46 AM, you wrote:
cs> I have been following this thread and have something to offer here.
cs> I can't think of why the loading problem , BUT, the hi voltage appears
cs> too low. Has it been measured with an external voltmeter?? It should be
cs> about 2400 vdc no load and around 2100 fully loaded.!! I have always run the
cs> 200 at about 75 watts in , and using a pulser for tuning I generally got
cs> about 750 watts PEP output on all bands except 15 - 10 m.on those bands it
cs> was down to about 700 w. again PEP with a pulser.
cs> also , how much input power and what is the input swr??
cs> I use two Autek wm-1 meters , one in , one out, and altho I can't vouch
cs> for their accuracy, I'd say they are well within the 5-10% range , all
cs> things considered.!!!
cs> I have all the info here on the SB-200/201 if anyone should need it.
cs> Have a good day my friends.
cs> carl / kz5ca
cs> P.S. I always have run that type amp on 120 ac input. , and remember that
cs> the transformer was designed when the" standard "
cs> line voltage was closer to 110-115 , not what is is today, at my qth it is
cs> generally closer to 120-125.!!!
cs> Need more info?? e-mail me.
cs> carl / kz5ca (not a genius , BUT)
--
Best regards,
John mailto:kvp@bigfoot.com
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