[Amps] Re-imagining the 30S-1

[Alek Petkovic]

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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