> From: skipp isaham
> Sent: Friday, March 29, 2002 5:18 AM
> To: amps@contesting.com
> Subject: [Amps] Dentron GLA 1000 and Amp Supply Amplifier follow up
> comments.
>
>
> Just depends on your point of view, budget and how
> handy you are. As a project amplifier, they are cheap
> enough for a first repair/rebuilt/starter amplifier. I've
> seen the Svetlana tubes and have a picture from an
> Italian Amateur (Bernie) with a pair of 4cx250's in the
> same space/cab.
If someone produced a new PC board for it, a conversion to single
4CX400 would be interesting for the GLA-1000. The only real issue
would be getting the proper high voltage. The 4CX400 is easier to
cool than 2 x 4CX250 and should be able to provide 500 to 600 watts.
> With 40 watts drive, an improved Dentron or similar
> Amplifier could provide 10dB or more, stage gain.
> Nothing wrong with an extra 10dB... You can't buy
> the parts to use as a starter amplifier project for what
> you can pick up a dead Dentron for...
With a 4:1 (or 9:1) step up auto-transformer ("balun") and the
appropriate grid "swamping" resistor, a modified Dentron or similar
amplifier could provide 20 dB of gain for use with the Yaesu FT-817,
Elcraft or other QRP rig.
73,
... Joe, K4IK
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