[HBR] Re: HBR Digest, Vol 55, Issue 5

[Peter Bertini]

Well, FWIW, I found a lot of information in the March 1960 issue of
QST.  Several
circuits are shown, including several examples using self-excited injection with
the 7360. So, I guess the idea has some merit.  I'll give it a try,
but leave enough
chassis space for a dedicated oscillator tube socket to be safe :)

Here's something else I've been pondering over since reading the QST material.
 I've been told that the 6JH8 works best
with 0 volts on the deflector electrodes. However, it was
common practice with the 7360 to use a voltage divider
between the plate and deflector to provide negative feedback
(improved linearity) while biasing and balancing the
deflection electrodes. I'm thinking of using the same scheme
on the 6JH8, except having the low end of the voltage
dividers going to a negative bias source. That would allow
setting the electrode voltages to 0 volts, or slightly negative
or positive--whatever works best--while still keeping the
advantages of having negative feedback from the plate in my
6JH8 product detector. Probably a small point, but is it worth doing?

Pete