1949 9PC41 projection set

[Radiotronman]

It didn't post the picture on my last comment. So far there's not nearly as many caps as I thought there would be. I like that there are multiple chassis. Makes it more manageable and less overwhelming. I ordered the remaining caps for my GE 810 and I'll probably get into this set after Christmas. I'll begin replacing parts with what I have and begin cleaning and testing all of tubes. I'm looking forward to getting this big screen lit up! I have the original RCA device data, thanks to a fellow collector.

[Radiotronman]

Look at the size of the transformers used on this low voltage power supply! This set uses 41 tubes whereas the philco projection set of this era only used I think around 25. Why such a difference?

[Electronic M]

Originally Posted by Radiotronman

Look at the size of the transformers used on this low voltage power supply! This set uses 41 tubes whereas the philco projection set of this era only used I think around 25. Why such a difference?

RCA and Dumont in the early post-war were trying to show off what TV could do so they tended to over engineer their chassis. It was not going to market if it had JUST enough to work properly, it had to have as much stability and performance as it could. RCA also was allergic to stuff the did not hold the patent to like the tube count reducing inter-carrier audio (IIRC they were the last to adopt it).

Look at a 630 chassis 10" table set....About 40 tubes in those too.

[Radiotronman]

These three chassis should keep me busy awhile. It looks like the vertical section on the if/rf chassis has had some repairs before. Several bumblebee replacements and one electrolytic can has a lot of leakage underneath it too. The if/rf chassis has a few 1000v caps I'll have to order too.