572B

[Gary Schafer]

If you are running 752Bs in the 30L1 you really only need 2 of them. There is no point in
putting 4 of them in there as the power supply is not big enough for 2 kw that 4 572Bs are
capable of. Save your money! Although with 4 of them they should last a life time. You
would cook the power supply before you would hurt the tubes.
One 572B will handle a little more power than a pair of 811As.

73
Gary  K4FMX


Carl Hyde wrote:

> Lots of 30L-1s run 572Bs. Its no problem although
> quite a lot more expensive to buy 4 of them. I use the
> Svetlana tubes because they appear to be more rugged
> and have ceramic base and plate cap. I just put a set
> into an SB-200 and it works great.
>
> --- Bob Meyer <Rascal at UTEC.NET> wrote:
> > I havent had a amp here with 572B tubes yet.
> >
> > are they bigger than 811A.
> > The collins does not have much room.
> >
> > There is a little more room to play with on
> > heathkit.
> >
> > Any  one tryied 572B tubes in
> > Collins 30L1?
> >
> > I will look for spec sheet on 572B..
> >
> > Robert,
> >
> >
>
> =====
> Carl HYDE
> W2CSH
>
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