02-12-2006, 02:23 AM
Ok, This is regarding, of course, the 37-650.(My RF Generator is back online, thanks to some help from friends, and a manual supplied by W7FG.com- Thanks!)
Here goes: When I rebuilt the chassis, I replaced all the original resistors, with new ones from Radio Daze. All seemed well, until tonight. Researching a resistor for a probe rebuild(for my oscilloscope) I happened to notice something did not seem right with some of the left over new resistors. As I had trusted my supplier, I used what was sent, without reading the codes.
I have come to discover that the resistor I used to replace number 46 had the color code: orange-orange-grey-gold. If I am reading this correctly, it is 3,300,000,000 ohms, not the required 330,000 ohms (orange-orange-yellow-gold) called for - about 10,000 times the resistance specified.
First- Am I Correct in this belief;
Second- Could this be the long sought problem with my receiver;
Third, would this have worked as described for a few hours, and then given up? (Described as- low volume on all but very strong local stations, and only moderate volume then)
I am pretty sure it is- This resistor falls between the bias resistor(58 ) and grid 1 on the 6F6G Output tube, also prior to the #45 condensor leading to 6K5G First Audio plate.
I do know one 6F6G went bad: hopefully I haven't destroyed anything...
I am going to attempt a substitution, and see if I get a signal through, but I am looking for independent confirmation of my assessment...
Chuck? Ron? Anyone?
And Yes- I think I will keep it toward the front of my mind to check each resistor next time as they arrive: not just leave it to faith.
Thanks!
Scott
Here goes: When I rebuilt the chassis, I replaced all the original resistors, with new ones from Radio Daze. All seemed well, until tonight. Researching a resistor for a probe rebuild(for my oscilloscope) I happened to notice something did not seem right with some of the left over new resistors. As I had trusted my supplier, I used what was sent, without reading the codes.
I have come to discover that the resistor I used to replace number 46 had the color code: orange-orange-grey-gold. If I am reading this correctly, it is 3,300,000,000 ohms, not the required 330,000 ohms (orange-orange-yellow-gold) called for - about 10,000 times the resistance specified.
First- Am I Correct in this belief;
Second- Could this be the long sought problem with my receiver;
Third, would this have worked as described for a few hours, and then given up? (Described as- low volume on all but very strong local stations, and only moderate volume then)
I am pretty sure it is- This resistor falls between the bias resistor(58 ) and grid 1 on the 6F6G Output tube, also prior to the #45 condensor leading to 6K5G First Audio plate.
I do know one 6F6G went bad: hopefully I haven't destroyed anything...
I am going to attempt a substitution, and see if I get a signal through, but I am looking for independent confirmation of my assessment...
Chuck? Ron? Anyone?
And Yes- I think I will keep it toward the front of my mind to check each resistor next time as they arrive: not just leave it to faith.
Thanks!
Scott
Old Cars, Old Radios, Old Pipes and Young Women... What more is there?