Model 650 Tone Control Question
Posts: 182
Threads: 8
Joined: Apr 2023
City: Roanoke
State, Province, Country: Virginia
'MrFixr55 Wrote:"Typical" states 6K Ohm for triode connected Push Pull, there is a listing for "cathode bias" showing 10K plate resistance for AB2 Push Pull operation.
...
However, this is academic, as the Philco docs that Ron has stated 6K Ohm Plate resistance. Of course, this info is all lightyears before computers, so either there are mistakes, spec differences between manufacturers or whatever.
6k plate-to-plate is correct as these are triode-connected 42s with fixed bias. If they were cathode biased they would be 10k plate-to-plate. I see no mistakes. The RC-12 data is simply more specific in naming fixed bias.
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
https://plymouthcolony.net/starcity/radios/
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RE: Model 650 Tone Control Question - by DaleHCook - 07-13-2023, 05:04 PM
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