Todd,
Unless you are wanting way in excess of 1500 watts output from your 4-1000A,
a 100 watt solid state exciter will do nicely, despite what some of the
so-called experts on this reflector have claimed. My 4-1000A runs between
1200 and 1500 watts output 160-10 (non-warc bands) meters with 4 KV on the
plate and 100 watts drive power. If one wanted, I could see raising the
voltage to 5000 volts and easily getting the 1500 + watts output on all
bands with 100 watts drive. I use a 1:2 broadband torroid input transformer
with a band switched parallel tuned circuit at the cathode for input
matching.
Photos of this amplifier can be seen at:
http://www.angenent.org/W7IUV/w6ru/w6ru.jpg
Good Luck,
Terry W6RU
----- Original Message -----
From: <ToddRoberts2001@aol.com>
To: <amps@contesting.com>
Sent: Thursday, April 26, 2001 4:23 PM
Subject: [AMPS] Buffer/Driver Stage for 4-1000 Amp
>
> I am planning to use one of those 90-100 watt solid-state rigs to drive a
> 4-1000 amp project. From what I can gather it appears that to be able to
take
> full advantage of an all grounded-grid/ cathode driven 4-1000 tube ,the
> driver should be able to supply about 150-200 watts of drive. It would
seem
> the best answer would be to build a buffer/driver stage using perhaps a
> single or dual 811A tubes that could be driven with maybe 25-50 watts and
> deliver 100-200 watts of drive to the 4-1000. I was wondering if anyone
has
> ever tried this or any suggestions? How about a pair of 811A's running
class
> A driving the 4-1000 cathode? Thanks for any ideas. 73 Todd Roberts WD4NGG
.
>
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