Philco model 18 (code 121) - HELP!
Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY
Jerry. it definitely seems like there is a missing dot on the 118 schematic. Without the dot, there is no source of screen voltage for the RF and IF tubes. Their screen grids are simply connected together with nothing else hooked up and this obviously cannot work as shown.
Looks like no one checked the schematic for accuracy as that's not the only error. If you look at the 42 driver tube, there is also no connection from the screen grid to B+. only a bypass cap to ground.
Messages In This Thread
RE: Philco model 18 (code 121) - HELP! - by Mondial - 04-19-2013, 08:30 AM
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