[ARC5] Speaking of Tetrodes for Triodes...

[arc5 at ix.netcom.com]

Trying again to send this... wonder what's going on??

----- Original Message ----- 
From: "Henry Mei'l's" <meils at get2net.dk>
Subject: [ARC5] Reducing BC-459A chirp: 12A6 replacement for 1626

> Screen grid voltage derives (from osc. anode voltage?) via a 20k series
> resistor,
>bypassed witrh a 0.001uF cap....

I have been testing inexpensive substitutes for the "audiophool" tubes
used in SCR-183.  Triode-connected 6AQ5 or that jumped-up
version, 58summthin-summthin, seem to be the best so far,
and their sockets mount easily in 4-pin bases.
I've been thinking of tapping-off B+ at the cold end of the tank circuit and
running screen voltage to them through an approriate resistor to see
if I can get more "umph."  I'm certain it will change the neutralization,
but I'll deal with that later.  Any comments on this?
73 Dave S.