[ARC5] ARC-2: IF Coupling Caps from 5 to 3 pFd? Ehhhhh....

[David Stinson]

I got some nice NOS 3 pFd dogbones and replaced the 
5 pFd coupling caps with 3 pFd.   One of them is 
under a bandswitch cam is a very bugger to change,
but I got it done.
The IF alignment barely changed at all- not a good sign.
Ran the curve and there is only a minor reduction
in overall bandwidth- almost nothing on the lower-
freq slope and about 10% on the upper slope.
The top of the curve is actually a little wider,
but that might be "slop" in my primitive test conditions.
Since the bandwidth remains essentially unchanged
and the stage gain was unaffected, I decided to leave
the 3 pFd caps in there rather than risk more damage
to that easy-melt cable right next to the terminals.

One question answered:  There is no significant 
residual magnetic coupling around the shielding.
With the 5 pFd caps disconnected and the 3 pFd
not yet installed, I could not push a signal through
the stage on the highest setting of my sig gen.

73 DE Dave AB5S