I have an sb 1000 converted to six meters that is definitely oscillating
it still uses the 3-500z but after reading Rick Measures web site I see now
anode supressor that was built was not going to supress much. It was an inch
1 turn copper coil and 10 watt 37.5 ohm resistor network consisting of 2 75ohm
resistors, one inside the coil and one outside the coil. When the amp went into
oscillation (i think partially due to a combination of an bad zener diode and
me playing with the input pi network tuning cap) it blew the outer resistor
the inner was spared.
I now want to try to get this amp to be stable but all the reference material I
see on the net or in the ARRL HB deals primarily with 3-500z tubes in HF amps,
not on 6 meters. I know I had other problems ( maybe a dead tube or the Zener)
but I want to
at least give the tube a fighting chance. Also is a good test bed for other
including the henry amp that needs a similar upgrade.
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