Exactly, Alek. The 3CX400's and 3CX800's are still high demand, high price,
and almost unobtainium. Hoarders need to sell while there is still a market
for them.
73,
Steve, N2IC
On Tue, Oct 29, 2024 at 3:57 PM Aleksandar Petkovic via Amps <
amps@contesting.com> wrote:
> Easy. Sell some of your tubes and buy a new 3-500Z.
>
> 73, Alek VK6APK
>
> PS: what would you want for a pair of 3CX800A7s?
>
>
> On 30/10/2024 12:56 am, Paul Decker via Amps wrote:
> > Hey gang.
> > I'm the proud owner of an AL-80A that's an absolute basket case. Tube is
> gone, HV section looks like it needs a rebuild.
> >
> > My "in stock tubes are: Qty 6 - GI-46B, Qty 6 - 3cx800A7 and U7, Qty 6 -
> 3cx400A7 and U7, Qty 2 -TH308, Qty 2 -TH328, Qty 2 - 8791, Qty 4 - 7213,
> Qty 2 - 7650, Qty 2 - 4cx1500B, (4cx350/250/150, 2c39, some other power
> tubes I don't really know) and sockets for all except the GI-46B and
> 4cx1500B.
> >
> > The goal is "fix'er up" with buying as little as possible. I'm leaning
> towards the GI-46B an the other triodes since there is no need for any
> extra screen bias voltages or control. The pair of 3cx400U7's (or 800's)
> would fit in real nice too, except it then requires some kind of forced air
> cooling mechanism.
> >
> > It looks like it's using a voltage doubler for a no load voltage of
> 3000V and loaded voltage of 2700V. I could pull a few windings off the
> transformer to lower it down a bit for the 3cx400/800 tubes, or just run at
> 2700.
> >
> > What do you all think would be the best fixer up route?
> >
> > Paul.
> >
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