05-06-2026, 07:45 PM
Hi Philco4Me,
Are you piping the phono through the same preamp connection that was used for the BOL pickup? Are you using the transformer that was used for the BOL?
Obviously, there are 2 possible scenarios, either the cartridge or the circuitry. Try connecting the cartridge to another amp. The aux input should work for many ceramic cartridges. Alternatively, connect another turntable with a ceramic cartridge or other external source to the phono input. However, you need to be able to attenuate the signal. The headphone output of a CD player should work.
Ceramic cartridges could go bad. The stylus could have become damaged. The tube could have become gassy. You coud swap the preamp with the 1st audio amp if both are type 7C6. If radio performance suffers, then the tube swapped into the 1st AF section was bad.
Hope this helps.
Are you piping the phono through the same preamp connection that was used for the BOL pickup? Are you using the transformer that was used for the BOL?
Obviously, there are 2 possible scenarios, either the cartridge or the circuitry. Try connecting the cartridge to another amp. The aux input should work for many ceramic cartridges. Alternatively, connect another turntable with a ceramic cartridge or other external source to the phono input. However, you need to be able to attenuate the signal. The headphone output of a CD player should work.
Ceramic cartridges could go bad. The stylus could have become damaged. The tube could have become gassy. You coud swap the preamp with the 1st audio amp if both are type 7C6. If radio performance suffers, then the tube swapped into the 1st AF section was bad.
Hope this helps.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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