[Amps] Re-imagining the 30S-1

[Martin Sole (HS0ZED)]

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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>