Posts: 31
Threads: 8
Joined: Jul 2021
City: Franklin
State, Province, Country: Wisconsin
I have a 38-7X Console radio which is missing the speaker. I have a speaker for a 38-38X however it has a different output transformer attached, and the speaker is stamped as a HR-20 and is driven by a push pull output tube 1J6G. The schematic / parts listing for the 38-7X calls for a H 31 speaker driven by a 6F6G output tube. Is there a way to modify the HR 20 or use a totally different speaker?
Posts: 7,246
Threads: 266
Joined: Dec 2009
City: Roslyn Pa
You'll need an opt to match the 6F6/42 to VC vs the 1J6. And something to replace or act as the field coil. The 1J6's output is somewhat less than the 6F6 so wouldn't be a good idea to try the the opt on the spk. The current rating is going to be too low and the load resistance too high.
Replacing the spkr w/a modern one is the same. Find an opt 5k to vc and something to replace the fc.
https://philcoradio.com/library/download...%20280.pdf
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
(This post was last modified:
5 hours ago by
Radioroslyn.)