[Heathkit] SB-634 modification, WB4VVF Accu Keyer installed

[Jim Brannigan]

I built and used an ACCU-KEYER for many years.

Jim

> Hi,
> 
> I checked one of my SB-634 and it has a mod. There is a pcb mounted
> vertically behind the main pcb with "WB4VVF" on it. A Google search
> found it to be the Accu Keyer from QST August 1973. Is this of any use
> or should I remove it?
> 
> 73
> Heinz DH2FA, KM5VT