[ARC5] BC-453 mods

[Kenneth G. Gordon]

Making the 1st IF regenerative in any of the models is easily done, 
and makes a big difference for weak signals....not so much for strong 
ones.

Two pieces of #12 TH or THHN (with insulation still on) soldered to 
the grid and plate terminals, and a pot in the cathode is all it 
takes.

The main problem I always had when trying to replace tubes with FETs 
is that an FET is basically a triode. For multi-grid tubes, this is 
often a real problem.

For triodes, not so much.

I have a pair of Tubesters here which I took out of a Heathkit VTVM. 
As I remember it, one replaced a 6AL5 and the other a 12AX7.

vy 73,

Ken W7EKB