11-23-2016, 09:58 AM
Leaving 6F6 (output tube) in place start removing other tubes one by one and then putting them back.
First 6R7. Remove, see if the motorboating stops, then put back. If it did not stop, stop here.
If yes, then do the same with the 6U5 tube.
Until you find the tube where it does not stop with the removal (likely the RF tubes won't stop it).
Likely to be either of the 6U5 or 6R7.
Again, you have to find the last tube as far from the output (or as close to the antenna) that stops the motorboating once removed.
First 6R7. Remove, see if the motorboating stops, then put back. If it did not stop, stop here.
If yes, then do the same with the 6U5 tube.
Until you find the tube where it does not stop with the removal (likely the RF tubes won't stop it).
Likely to be either of the 6U5 or 6R7.
Again, you have to find the last tube as far from the output (or as close to the antenna) that stops the motorboating once removed.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
