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

[Geoff]

----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>
To: "ARC-5 List" <arc5 at mailman.qth.net>
>
>> 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.
>

I suspect that I have as good as or better understanding of the EE world 
than you do but Im not obsessive about shoving it in everyones face as you. 
Typical academic type.


>> ...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.
>


I quote from you:

> The interphone amp in all common WWII-era aircraft interphones (until the
> late-war AM-26/AIC, part of AN/AIC-2) did not provide further
> amplification
> of any receiver's AF output, even one that is connected to ten headphones.
> The weak little VT-99 (6F8) of the common RC-36/BC-347-* single-tube
> interphone amp was always connected simultaneously to all headsets.

And now you say it has nothing to do with headphones.

As with many of your posts they seem to be constructed more to confuse 
rather than educate. In any case a high impedance headphone amplifier is a 
natural for the 6F8 if you can actually understand vacuum tube fundamentals.



> 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.

Because I signed on from another PC and didnt remember all the setup 
parameters for OE. Most on here already know who I am so I just left it. 
Would you like me to sign on with something different so you dont get so 
itchy twitchy upset? My, my, you are rather high strung.

>
> 73,
> Mike / KK5F (Nothing to hide, nothing to deceive!)
>And: nothing to offer>
>