[ARC5] BC-348 Solid State Replacements

[John Watkins]

I still have 4 solid state 6AL5 tubes.  Direct plug in.

John WD5ENU

Sent from my iPad

> On Jan 1, 2017, at 21:11, Jim Haynes <jhhaynes at earthlink.net> wrote:
> 
> Yeah, I have one of those R-392 receivers and converting it to FETs
> is a project a long time on the back burner.
> 
> I remember FETRONS - believe the original application was in AT&T O and
> N carrier systems which used an awful lot of 407A and 408A tubes.  Which
> were equivalents to 6AK5 and 2C51 except for 20V and 40V heaters as
> the equipment ran off the 48V central office battery.  Now I believe those
> FETRONS were intended as direct replacements and did not require lowering
> the B+.  I also recall that there were two different FETRONS for replacing
> one of the tube types, depending on whether it was used as an oscillator
> or as an amplifier.
> 
> Seems like someone also was making FET plug-in replacements for Collins
> S/Line gear at one time.
> 
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