Re: [Amps] GU84-B ratings

[Will Matney <craxd1@ezwv.com>]

Barry,

That Dutch website I listed a few days back had one of the better 
designs using the GU-84B tube I've seen. The only weak part I thought 
was him using a light bulb as a dropping resistor for the screen shunt 
regulator. To me, it would allow too much of a current surge until the 
filament heated up. The shunt regulator used is for QSK, and can be 
modified by using a 3900 ohm, 25W resistor there at the bulb. I actually 
had a good e-mail conversation with the builder on it. To me, from what 
I recall, he had the voltages ran pretty much at spec. Below is the link 
to the site, you might find it useful.

Website:   http://home.planet.nl/~fhvgeerligs/Lineairs/Lineairs.htm

Best & 73's

Will Matney



Barry Kirkwood wrote:

> Have seen a variety of designs using GU-84B with various anode voltages etc.
> Would appreciate any views about GU84 operating conditons for amateur HF SSB 
> and CW service.
> Thanks and 73
> Baz
>
> end
> Barry Kirkwood PhD ZL1DD
> Signal Hill Homestay
> 66 Cory Road
> Palm Beach
> Waiheke Island 1240
> NEW ZEALAND
> ph/fax 64-9-372-5161
> www.waiheke.co.nz/signal.htm
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