[AMRadio] Ferroresonant transformer revisited

Rick Brashear rickbras at airmail.net
Wed May 10 10:15:11 EDT 2006

No doubt, they are noisy rascals, hot too.  Geoff, I'm glad you 
mentioned 450TL.  I have one I acquired with an old BC-610 someone had 
hacked up trying to make an amplifier.  Is there a way to test more than 
the filament other than putting it in a working amplifier?  I'd kind of 
like to build something around it, but would hate to get it all complete 
only to find the tube was too weak or dead.


W5OMR/Geoff wrote:

> The transformer I had (which ultimatly went back to Ronnie/W5SUM when he
> got my 450TL's) was labled a "Sola Constant Voltage Transformer".
> 90 ~ 150v input, 7.5v ouput @ 42amps.
> I remember hooking the thing up one time, to check some tubes (450's)
> and with just the primary connected, the durn thing was 'noisey'.  Made
> noise, just sitting there, with no load.  Noise didn't change with a
> load, either, but that transformer sure did lite up a pair of 450TL's...
> 7.5v @ 12amps, each.
> -- 
> 73 = Best Regards,
> -Geoff/W5OMR
> A: Yes.
>> Q: Are you sure?
>>> A: Because it reverses the logical flow of conversation.
>>>> Q: Why is top posting annoying in email?
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