09-02-2023, 05:05 AM
Hi Chas,
Thanks for your very prompt reply.Yes, I thought that 10 mfd was a bit odd. 10pf sounds much more realistic. The ceramic cap, hanging on by one lead did indeed look like a resistor. I have made progress with the set after cleaning the switch contacts and am now getting a m.w.signal from aerial to speaker. Someone has replaced the output transformer but the output was very muted even though the 6F6 had the right bias on both cathode and grid and was drawing about the right current.The secondary of this obviously very new xformer had three leads,presumably to match speakers of different impedance. Anyway I swapped two leads over - instant lift in volume! So thanks again for your help with this set . I'll be checking voltages and valves (oops! ...) tubes as the process of tweaking continues. (Just in passing - any thoughts on why a ceramic capacitor was specified there? ) Cheers.
Thanks for your very prompt reply.Yes, I thought that 10 mfd was a bit odd. 10pf sounds much more realistic. The ceramic cap, hanging on by one lead did indeed look like a resistor. I have made progress with the set after cleaning the switch contacts and am now getting a m.w.signal from aerial to speaker. Someone has replaced the output transformer but the output was very muted even though the 6F6 had the right bias on both cathode and grid and was drawing about the right current.The secondary of this obviously very new xformer had three leads,presumably to match speakers of different impedance. Anyway I swapped two leads over - instant lift in volume! So thanks again for your help with this set . I'll be checking voltages and valves (oops! ...) tubes as the process of tweaking continues. (Just in passing - any thoughts on why a ceramic capacitor was specified there? ) Cheers.
