08-07-2014, 03:38 PM
Model H is the one to use and they regularly pop up on eBay. I bought one just in case and it came handy.
Electrically a speaker from 90 or 20, with pushpull transformer, will work, but the size is different (smaller). And it is more expensive.
Electrically a speaker from 90 or 20, with pushpull transformer, will work, but the size is different (smaller). And it is more expensive.