Thanks guys,
Well in addition to the amp I do have a bucket full of 4CX1000 tubes,
sooooooo!
If baking out the transformer and other iron does pay off and if I can
find someone who can paint match and if I can find another psu tray and
if I can find the other little doo dads then a restoration is definitely
on the cards. I would perhaps prefer that. It will look nice with the
rest of the S line. I have the SS rectifier plug ins so that's not a
problem. Time to make so iron heat up a little I guess and see what happens.
Tnx
Martin, HS0ZED
On 13/07/2015 10:33, Alek Petkovic wrote:
I'm with Roger.
Modern is simple and light weight. Do away with all that iron.
Get the transformer rewound. A bunch of 6A10 diodes with a string of
electrolytics and MOF resistors and the job is done.
Also, if you're gonna stick with the tetrode, do the upgrade to the
FU728F.
Good luck,
Alek.
On 13/07/2015 3:01 PM, Roger (K8RI) wrote:
I'd build a new amp that would easily run the legal limit, any mode,
no time limit. IF the transformer is good after baking out then
restoration is likely the cheaper route, but use the SS tube
replacements and keep the rectifiers handy as you could still sell it
as a restoration.
IF you are not going to do a restoration. Modern PS and modern
amp. Choice is what to use for a tube or tubes and whether triode or
tetrode.
73
Roger (K8RI)
.
I've got a bit of a basket case 30S-1. Much of the power supply iron may
well be junk. Sat submerged in flood water for well over a month and
that
was a few years back.
Getting toward thinking about reworking it I'm wondering if I can
improve
things a bit. Not in terms of what it was but what it might be. So if
you
were rebuilding such a plate supply would you still do it the same way,
centre tapped trafo, tube rectifiers, resonant choke filter, big
bleeders?
Or is a more modern approach, single secondary winding, bridge rectifier
and stack of electrolytics more the way to go?
Though there's quite a bit of interlocking and protection in the way the
power supply is arranged it all seems fairly straightforward.
Martin, HS0ZED
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