10-25-2008, 01:37 PM
Hello
This is my first try at restoration. I have a model 40-190. Got a schematic from Chuck S. I found that the 84 was replaced with an 80 tube. The power transformer was replaced also. The transfomer checks good ( on bench with no load ). The 61 cap was replaced with a 20mfd, the 60 resistor was replaced with a 500 ohm 2 watt and the 59 resistor is still a 15 ohm which got burned pretty bad. The 56 output trans (32-8053) secondary is open. The lead from the Feild coil 62 was tied to the filament of the 80 tube, this is a separate winding from theothe filaments. Neither lead of this winding is grounded.
My first ? is can an 80 tube replace a 84 without making some changes?
? 2 would this have caused the output trans to open?
? 3 is it possible to get a new power trans or rewind the old one?
? 4 is there a schematic that would show an 80 tube?
Finally ther are a some othe things that don't agree with the schematic would it be wise to make them agree?
Just want to say I already got a lot of great info from reading the other post.
Thanks in advance for any help.
Bob
This is my first try at restoration. I have a model 40-190. Got a schematic from Chuck S. I found that the 84 was replaced with an 80 tube. The power transformer was replaced also. The transfomer checks good ( on bench with no load ). The 61 cap was replaced with a 20mfd, the 60 resistor was replaced with a 500 ohm 2 watt and the 59 resistor is still a 15 ohm which got burned pretty bad. The 56 output trans (32-8053) secondary is open. The lead from the Feild coil 62 was tied to the filament of the 80 tube, this is a separate winding from theothe filaments. Neither lead of this winding is grounded.
My first ? is can an 80 tube replace a 84 without making some changes?
? 2 would this have caused the output trans to open?
? 3 is it possible to get a new power trans or rewind the old one?
? 4 is there a schematic that would show an 80 tube?
Finally ther are a some othe things that don't agree with the schematic would it be wise to make them agree?
Just want to say I already got a lot of great info from reading the other post.
Thanks in advance for any help.
Bob
