02-08-2013, 08:18 AM
Here's the update...
I got in the new 76 tube a few days ago. Tonight I installed it in the radio. After doing this, and making all modifications suggested in service notes, I now have the complete Band 4 working. Unfortunately, band 5 stops working below 13.5 MHz. If I raise the plate voltage to 100 volts or so, I can bring that down to 12.5, but it will not oscillate any lower. I've been offered a replacement LO coil for the SW bands, I'll see if that helps when it gets here.
In the meantime, does anyone have any suggestions as to things I can try?
I got in the new 76 tube a few days ago. Tonight I installed it in the radio. After doing this, and making all modifications suggested in service notes, I now have the complete Band 4 working. Unfortunately, band 5 stops working below 13.5 MHz. If I raise the plate voltage to 100 volts or so, I can bring that down to 12.5, but it will not oscillate any lower. I've been offered a replacement LO coil for the SW bands, I'll see if that helps when it gets here.
In the meantime, does anyone have any suggestions as to things I can try?
