[Milsurplus] BC-9: A Big Road Block

[David Stinson]

----- Original Message ----- 
From: "AKLDGUY ." <neilb0627 at gmail.com>
Subject: Re: [Milsurplus] BC-9: A Big Road Block


> Yes, I understand that the meter would get slammed. Or would 
> it?
>
> There was some doubt about the circuit diagram, with the part 
> of it
> in the vicinity of the key being missing and retrieved from 
> somewhere
> else.

Thank you for writing, Neil.  The diagram is correct;
the key bypasses the meter and C5/R5.  R5 limits the
B+ on the RF tube to about 70 volts on receive.  When
the key is pressed, R5 is bypassed and full 120V B+
is applied to the tube.  I'm getting almost exactly 1W output
using an external tank coil that is link-coupled to the antenna.
I mis-typed that on transmit, the OSC was shifting higher;
it is in fact shifting lower by about 15-18 KC.
I must assume this isn't a problem with a VT-1 since
these sets remained in service many years and could not
have functioned like this.
I intend to go forward with your suggestion of trying
a 6C4 in this stage.  We'll see how it goes.

73 Dave AB5S