You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

check tubes on a good checker looking specificly for heater-cathode short/leakage.
tap on the tube as it warms up.or substitute others that are fine in another set.
fixed an old yellow machine for a neighbor that had been humming in rx and tx for many years.tech at the truckstop replaced every lytic in it.iirc it was a 12ax7.leakage was not enough to light the short light on a cheap tester but my jackson 648 found it.

[QUOTE="kc8adu, post: 334538, member: 11954"] check tubes on a good checker looking specificly for heater-cathode short/leakage. tap on the tube as it warms up.or substitute others that are fine in another set. fixed an old yellow machine for a neighbor that had been humming in rx and tx for many years.tech at the truckstop replaced every lytic in it.iirc it was a 12ax7.leakage was not enough to light the short light on a cheap tester but my jackson 648 found it. [/QUOTE]

Top Bottom