Gary
K8BKB _______________________________________________ Boatanchors mailing list [email protected] https://puck.nether.net/mailman/listinfo/boatanchors
I have a Johnson 500 which has developed a problem which I believe to be
in the audio chain up to the 6B4G driver. The factory tube line up is:
12AX7 ( first and second audio amplifier), 6AL5 (audio peak clipper),
6AU6 (third audio amplifier), 6B4G (audio driver). My transmitter
has been modified in the clipper stage. Instead of a 6AL5 it has a 6C4
.... Anyone know of this modification? could it be a WA1HLR mod?? I
also have a small board mounted to the bottom of the chassis which has a
SK 3021 NPN power transitor. Handles 300 vceo, 500 vcbo, 35 watt,
2amps in a TO-66 case. On the board is also (3) diodes and a 10K ohm 2
watt resistor. What mod might this be ??? may or may not be related to
the 6C4.
- [Boatanchors] JOHNSON 500 speech clipper mod? Gary Franklin
- Re: [Boatanchors] JOHNSON 500 speech clipper mod? gary skillicorn
