10-05-2014, 03:55 PM
Recently went back to work on Philco 90 with single 47. Have quite a bit of hum. Electrolytics were replaced with 10 mfd. All the Bakelite caps were rebuilt. Also the metal multi cap boxes were redone with the correct values(as per this site) also the tone control was redone. All tubes very good.
Out of spec resistors replaced.
How large of electrolytics can I use? Any other thoughts on possible hum causes on this old guy?
I did everything this site suggested.
Thanks
Out of spec resistors replaced.
How large of electrolytics can I use? Any other thoughts on possible hum causes on this old guy?
I did everything this site suggested.
Thanks
