[Heathkit] Help with SB-401

[ma.locksmith at juno.com]

What you have missed is that the "active" rotating portion of B2F is
connected through the wafer to the rotating portion of B2R....

B2F has two rotating contacts.....  one is very large (11 positions) and
the other is small (only 1).  The large one just connects all of the
other coils together to prevent interference, while the small one selects
the proper coil for the band.  That contact is supposed to be carried
through to the other side which is always active....  in all 12
positions.  And, that's the way the power (and the proper coil) gets
connected to the plate of V8A.

Ed
K1ZOK

On Mon, 5 Mar 2007 23:23:18 -0500 (EST) Dave <w8qwdave at peoplepc.com>
writes:
> 
> My problem is this:  I look at the schematic and I cannot for the 
> life of me figure out how B+ voltage gets to the plate (pin 3) of 
> V8A.  It literally stops at the rear side of the second wafer on the 
> bad swtich.  The cathode is at ground, and I get proper voltage at 
> V8A pin 2.
> 
> This is driving me up a wall.  Can anyone help with some advice on 
> how the plate of V8A receives B+ voltage?