Thanks for the insight. will see how things work out. NI4L and
one other were running them pretty high. (4kv) I think Lynn, NO9Z also?
Kind of too late to drop that down no taps were setup on the transformer.
It would have been a great idea for multipleuses. I have direct input
to MagCap and he will make me anything I ask for.
Perhaps I'll sell this one and have another made if things don't work out
correctly.
I'm just getting into the tank and drive circuits and will see how that all
goes.
Chuck
==================================================================
-----Original Message-----
From: Peter Voelpel [mailto:df3kv@t-online.de]
Sent: Wednesday, January 04, 2006 12:02 PM
To: Partain, Chuck; amps@contesting.com
Subject: Re: [Amps] my little amp project of many hours..maybe 50% done
Hi Chuck,
I think your anode voltage will be a bit high.
The GU84B is a medium voltage, high current tube
and normally sees 2,2KV.
With the high impedance at 4KV you will run into
trouble on 10m as the bandswitch is a bit far away
and the minimum capacity of that tuning capacitor
will be not low enough for reasonable Q on that band.
If the ht-transformer has a center-tap I would go for
half the anode voltage
73
Peter
Von: "Partain, Chuck" <Chuck_Partain@maxtor.com>
> I'd like to see, a nice clean 1500w without making it work too hard.
> with 3900 on the plate and Probably ~30w in 80-10 (will see)
>
> Have a long way to go but needed to show a week long christmas vacation
with 30 hours or so
> of catching up over the years of thinking and playing around an hour or
two a week with it.
> a good investment in ferrite beads, tie wraps and cable guides should make
it look more presentable.
>
> thanks to all who contribute to this reflector, I've been
watching/reading.
>
> so..
>
> the hv tran. weighs in ~58 pounds, the lv tran. about 5-8. the box is 5lbs
and the rest of the
> components guessing 10 pounds?
>
> 80 pounds so far. not much more to go shouldn't go over the 100# mark! :)
>
> going to put good side handles on it :)
>
>
>
>
> That "little" amp is a real brute! Take more photos as you get the beast
> all together. What power level are you shooting for? How much does it
> weigh so far?
>
> 73, Keith NM5G
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Partain, Chuck
> Sent: Tuesday, January 03, 2006 4:18 PM
> To: amps@contesting.com
> Subject: [Amps] my little amp project of many hours..maybe 50% done
>
>
> http://home.comcast.net/~ka1mwp
>
> gu-84b based HF amp.
>
> this is my first foray into amp building.
>
> I'll redo many of the boards, and the filter, pretty much in breadboard
> state right now.
> many more ebay shopping sprees :)
>
> ~ka1mwp
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