Jim
I think you have the 3-400 confused with
the 3cx400a7. The 3-500's drop in the
MK-1 but are too tall without plate cap
or socket height changes.
Paul
PAUL HEWITT
WD7S PRODUCTIONS
QRO HOMEBREW COMPONENTS
http://wd7s.home.att.net
> Bill Smith <ko4nrbs@yahoo.com> asks
>
> >What is involved in
> replacing the 3-400 tubes in the
> >Swan Mark 1 with 3-500ZG?
>
>
> IIRC, it would be
> plug-and-play except for the
> sockets (which ARE different
> but have good resale value)
> and possibly the geometry of
> the slightly
> larger tube envelopes.
> However -- the 3CX800 IS
> plug-and-play, if memory
> serves me.
>
> Jim N6OTQ
>
>
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