[Johnson] Thunderbolt Plate Supply Transformers Failure History

[C E]

Mark:
I think you'd be wasting your time trying to service
the T-bolt with something like the original xfmr. Do
you want to have a working amp or do you want one sole
for collector purposes? Just like vintage cars, drive
the thing and put in a replacement transformer. I
would go hypersil  myself since it is available. I did
the same with a 32V2 a few years ago. I could have
retained the original look of the LV xfmr but quite
frankly,I was more concerned on getting on AM
reliably. That 32V served me well for about a year or
so before I sold it off. Cal. 

--- rOAdpIzzA <roadpizza at earthlink.net> wrote:

> I'm just now getting into Johnson equipment. What
> little I know seems to indicate that this renowned
> for robust equipment mfg had a time of trouble with
> the Plate Voltage Supply Transformers in their
> Thunderbolt amplifier series. Peter Dahl even
> carries the replacements, both original and
> hipersil, in stock! 
> 
> I want to know more about the failure mode, please.
> Overheating? Shorting, opening . . .
> 
> I've one that's bad, and am fighting with trying to
> rewind it myself (as soon as I find where I stashed
> the fish paper for a rainy day) or to scrap a bad
> design and go ruin originality and put in a Dahl
> hypersil.
> 
> Anyone I can help w/ pics or ??? of the HF and 6N2
> T-Bolt amps, email me - be sure to but something in
> the subject line of the email that will tell me it's
> not for the SPAM folder, eh?
> 
> GL es 73 de Mark KX8XX ...-.-
> 
> .
> 
> .
> 
> 
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> 


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