19-12-2020, 09:42 PM
Hi.
Jeffrey makes a very good point. In fact when an old scrap TV22 came my way a few years ago I went down the road of fitting a jelly pot line transformer. The PZ30 buckled under the strain of the much larger pulses from the new set up. The valve line up then changed from PL38-30P4, PZ30 - PY33/PY81. This and the line stage then ran on 105v HT plus 9kv EHT stabilisation with 9x1kv avalanche diodes.
Jeffrey makes a very good point. In fact when an old scrap TV22 came my way a few years ago I went down the road of fitting a jelly pot line transformer. The PZ30 buckled under the strain of the much larger pulses from the new set up. The valve line up then changed from PL38-30P4, PZ30 - PY33/PY81. This and the line stage then ran on 105v HT plus 9kv EHT stabilisation with 9x1kv avalanche diodes.
