02-24-2014, 04:31 PM
Madmurdock,
Understood. I feel it needs SOME sort of reinforcement. Perhaps a couple layers of duct tape applied to the bottom of the board. It seems stable now, and plays pretty well.
Morzh,
First thing I do on PC boards with tubes is to go around every socket and reflow the solder. Learned that one a LONG time ago.
Mondial,
Tubes are in push-pull. another of Philco's oddball drive arrangements. This one's not even the one with the screen feeding the alternate tube, it seems to make use of a negative feedback loop off the transformer secondary.
Understood. I feel it needs SOME sort of reinforcement. Perhaps a couple layers of duct tape applied to the bottom of the board. It seems stable now, and plays pretty well.
Morzh,
First thing I do on PC boards with tubes is to go around every socket and reflow the solder. Learned that one a LONG time ago.
Mondial,
Tubes are in push-pull. another of Philco's oddball drive arrangements. This one's not even the one with the screen feeding the alternate tube, it seems to make use of a negative feedback loop off the transformer secondary.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
