[Boatanchors] Revisiting: the R390A & 3TF7 substitutes

[Kurt Schmid]

Hi,

here a working solution:

http://schmid-mainz.de/Switching-Regulator-simplified.JPG

Regards

SigmaPert

am Samstag, 8. August 2015 um 02:10 schrieben Sie:

> Poking around for information on a solid state replacement schematic, I found some interesting
> comments on a fix.  People are reporting that Rick Mish puts a 40 ohm 10 watt Dale resistor where
> pins 2 & 7 had been and removes the socket.  A seller or two on the e-Place are marketing G-10 9
> pin plugs with a current regulator and pair of resistors mounted on a small vertical board.  It, I
> guess, is a more professional solution but I have not found a circuit for it yet or parts list.
> I really don't want to go chasing after 3TF7 tubes so polling the list here for what seems to work best for them.
> Thanks,
> Doug


>  

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-- 
Mit freundlichen Grüßen
Kurt Schmid
mailto:kschmid-mainz at arcor.de