[Amps] AL-811 Tube Swap

[Richard Solomon]

I am more interested being able to run
the Amp key down for prolonged tests.

It looks like the swap would be OK.

BTW, interesting to note that the AL-811
(3 X 811A) Power Transformer has the
same MFJ P/N as the AL-811HD (4 X
572B). Does reduce inventory costs.


73, Dick, W1KSZ

On Wed, Apr 28, 2021 at 12:25 PM Kim Elmore <cw_de_n5op at sbcglobal.net>
wrote:

> What I’ve read on this says not to expect much more out because the B+ is
> a bit low for 572Bs. But otherwise, it’s a simple swap. The 572Bs are more
> rugged.
>
> Kim N5OP
>
> "People that make music together cannot be enemies, at least as long as
> the music lasts." -- Paul Hindemith
>
> > On Apr 28, 2021, at 12:16 PM, Richard Solomon <dickw1ksz at gmail.com>
> wrote:
> >
> > I have an old AL-811 on the Test Bench
> > I use when I need a little more starch for
> > test purposes.
> >
> > I thought about replacing the 811's with
> > 572B's.
> >
> > Any pitfalls on that idea ?
> >
> > Tnx, Dick, W1KSZ
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