[ARC5] Added 6F6 audio stage...Aircraft Interphones

[Mike Morrow]

Carl/KM1H propositioned about WWII aircraft interphones:

> It may not have "amplified" the signal level but like any splitter [sic]
> type unit it provided the same output to up to 10 headphones as if they
> were each connected to a seperate [sic] radio.

I'm surprised to see such complete nonsense appearing in print on this
forum, save from a very few.

> In that case it fits its description as an amplifier...

You can't be serious...now I know you are joking.  Otherwise would admit
to a serious lack of understanding of the fundamentals of physics and
electrical engineering.

> ...and a 6F8 is far from a wimpy tube.

Nor is the 12A6 or 6K6 or 6V6 in the AF output sections of the various
aircraft receivers.  What's your point?

The 6F8 in the BC-347-* is only an interphone carbon microphone amplifier.
It is not an amplifier of the outputs of **any** receiver that is connected
to the interphone system.

Have a good day, Carl.  But, just between us friends, why do you **never**
use your **real name** and **call sign** when posting?  I always seem to
have to help you with that!  Never fear, though...I'll always be willing
to help my old friend Carl.

73,
Mike / KK5F (Nothing to hide, nothing to deceive!)