T
Tim Williams
- Jan 1, 1970
- 0
John Larkin said:There's a tube, still in use by Kepco or somebody, that's a nice 8KV
pentode. And the old color teevees had a shunt regulator tube that was
good to 25 kv or something absurd.
Either:
The 6BK4C (and similar types), a beam triode -- so constructed to prevent
ions from destroying the rare earth oxide cathode, it was used as a shunt
regulator to control the high voltage directly;
Or, a pulse shunt regulator like the 6HS5, also a beam triode with very low
perveance but very high current and voltage capacity and gain. These were
used to control the height of the flyback pulse as it took place (at the
sweep tube's anode, so big peaky voltages!), thereby regulating HV.
Tim