01-02-2018, 06:25 PM
Hi
I'm trying to troubleshoot a Philco FT-9. Unfortunately my tube tester (BK Precision 747B) doesn't have the switch setup for the 6A7, 78, 75, or 41 tubes. Were these superseded by other numbers? Any help would be appreciated.
Thanks
Bill Greeley
I'm trying to troubleshoot a Philco FT-9. Unfortunately my tube tester (BK Precision 747B) doesn't have the switch setup for the 6A7, 78, 75, or 41 tubes. Were these superseded by other numbers? Any help would be appreciated.
Thanks
Bill Greeley