07-23-2013, 10:14 PM
I was away for a bit, had a big vacation last month and needed to tie things up at home.
I just took some voltage readings as the radio still doesn't work (I did add an antenna, just wanted to mention that because I don't think I told you yet.)
I think I may know the problem and I'd just like to bounce off you real quick to get your input. First of all, EVERY 'P' to 'K' and 'SG to 'K' voltage reading for ALL of the 42 tubes is ZERO....nothing.
But, the power is going somewhere. The 80 tube reading for 'P' to 'K' is super high, it's 476 and it should be 350. (I'm using the DC measurements).
Looking at the schematic near the 80 tube I see that #51 the ‘Filter Choke’ is connected and I thought it may not be working properly since the power seems to be stopping at the 80 tube. I tried to take a resistance reading across the 2 contact points of the ‘Filter Choke’ and it was way over 1 million…so I thought that was really super high.
I then decided to feel the ‘Filter Choke’ and it wasn’t even warm. So I think I need a new one? Right?
One question, if I DO need a new one where can I get one, AND more importantly what spec do I need? Do I just ask for the one that is 166 Ohms like on the schematic?
Also, my shadow meter light is dead, where can I get one of those and does anyone know what size it is?
Thanks!
I just took some voltage readings as the radio still doesn't work (I did add an antenna, just wanted to mention that because I don't think I told you yet.)
I think I may know the problem and I'd just like to bounce off you real quick to get your input. First of all, EVERY 'P' to 'K' and 'SG to 'K' voltage reading for ALL of the 42 tubes is ZERO....nothing.
But, the power is going somewhere. The 80 tube reading for 'P' to 'K' is super high, it's 476 and it should be 350. (I'm using the DC measurements).
Looking at the schematic near the 80 tube I see that #51 the ‘Filter Choke’ is connected and I thought it may not be working properly since the power seems to be stopping at the 80 tube. I tried to take a resistance reading across the 2 contact points of the ‘Filter Choke’ and it was way over 1 million…so I thought that was really super high.
I then decided to feel the ‘Filter Choke’ and it wasn’t even warm. So I think I need a new one? Right?
One question, if I DO need a new one where can I get one, AND more importantly what spec do I need? Do I just ask for the one that is 166 Ohms like on the schematic?
Also, my shadow meter light is dead, where can I get one of those and does anyone know what size it is?
Thanks!