Bob, All great info, thanks. I will get to VTVM out tonight and poke around.
Thanks ! 73 Gene K1NR On Thu, 6 Dec 2012 09:15:10 -0800 (PST) Bob Loving <[email protected]> wrote: > Hi, Gene (and all): > > I just went through a VOX problem with one of my TR-4Cs. > The VOX dropout delay was too short for CW. After close > inspection of the two units, R135 was 33k, a value used > to set the cutoff bias for the 6FQ7/6CG7 even though I > had a 6EV7 in the rig. My other TR-4C, and a TR-4, had > R135 = 68k and the tube was a 6EV7. Changing the resistor > to 68k for a 6EV7 provided the correct VOX dropout delay > time. > > To summarize: R133 = 33k for 6FQ7/6CG7 > R135 = 68k for 6EV7 > > Good luck. > > 73, > Bob K9JU > > --------------------------------------------------------------------- Web mail provided by NuNet, Inc. The Premier National provider. http://www.nni.com/ _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
