09-09-2020, 11:46 AM
I suspect Amie's right with the PCL83 in her post #9, that Murphy were already using oodles of them in their TV's, and getting a good price, and would rather not introduce a new type in their Stores inventory unless necessary. Two good reasons.
The same would go with the OP transformer - good point.
Cartridge loading: it's easy to use a 1M volume control and then bring it down by parallel resistance added, which wouldn't sacrifice signal. (Maybe they had no 1M potentiometers in their stores though?)
12V bulb though, would make perfect sense! What's there is not bad design per se, but it could have been easier.
The same would go with the OP transformer - good point.
Cartridge loading: it's easy to use a 1M volume control and then bring it down by parallel resistance added, which wouldn't sacrifice signal. (Maybe they had no 1M potentiometers in their stores though?)
12V bulb though, would make perfect sense! What's there is not bad design per se, but it could have been easier.
