>Funny you mention the 3K-A, Rich. I may be picking one up this weekend.
>Having found very little
>on the 'net using Google, I wonder if anyone here has any suggestions
>(mods, upgrades, etc).
>Also, what is the supply's ratings (Plate V, etc).
>
*? 2500W CCS. Easily enough steam for a pair of 8877s. Useful mods
are: glitch-R in HV Positive circuit, high-speed switching, glitch
diodes across meter movements, lower VHF-Rp suppressors, replace narginal
blower with a Kooltronics high-pressure blower, and add a small DC fan
blowing air across filament pins. // an electric screwdriver is
recommended.
cheerz, Joe
>--- "R.Measures" <r@somis.org> wrote:
>>
>> ** Very few Ham amplifiers have a HV supply that will not sag under a Aÿ
>> / dead-carrier - thereby producing a mistune. The Henry 3K-A is one of
>> the few that has such a supply, however, it's 3-500Z cooling system is
>> not adequate for doing so (solder in pins 1 and 5 melts). // note - One
>> way to reduce average current during tuneup is to use a tuning pulser.
>> >
>> >
>
>
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