12-16-2011, 01:44 AM
Ok I picked up a 80 (on ebay) nice cabinet, but the usual trashed chassis.
it leads to many questions. The layout of the block capacitors is way more like the 81 in riders #3 than the 80... but it's an 80 I'm guessing a later revision chassis?
The output transformer for the audio amp was bad, I subbed in one I had on hand, a small merit A-3025. It's rated at 2500/3.2 ohms, 50ma, 3w. Is that big enough?
The grid lead for the 36 detector/oscillator was missing (as in gone!) I assume it came through the antenna coil can and was tied on to the bottom of the coil?
both 36's test very weak. I know these radios were 'touchy' when new, but would weak 36's keep it from working at all?
after adding a lead for the det/osc grid,the output transformer, and replacing the filter caps I have not much, if i touch the grid of the 2nd det i get some 60 cycle hum but thats about it. My next move is to replace the block caps as they all look like they have run hot, but should I get some 36's on order?
it leads to many questions. The layout of the block capacitors is way more like the 81 in riders #3 than the 80... but it's an 80 I'm guessing a later revision chassis?
The output transformer for the audio amp was bad, I subbed in one I had on hand, a small merit A-3025. It's rated at 2500/3.2 ohms, 50ma, 3w. Is that big enough?
The grid lead for the 36 detector/oscillator was missing (as in gone!) I assume it came through the antenna coil can and was tied on to the bottom of the coil?
both 36's test very weak. I know these radios were 'touchy' when new, but would weak 36's keep it from working at all?
after adding a lead for the det/osc grid,the output transformer, and replacing the filter caps I have not much, if i touch the grid of the 2nd det i get some 60 cycle hum but thats about it. My next move is to replace the block caps as they all look like they have run hot, but should I get some 36's on order?
John
Las Vegas, NV USA
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