I have made a real bonehead mistake this time. Hope someone can help. I am trying to determine where this wire in question will connect bak to when I reistall the RF unit. I had numbered it but forgot to note where I removed it from. As you'll see from the 2 attched photos(the best I could do), the wire in question is connected to pin 8 of the 6A8G and that pin is also strapped to pins 7 and 8. That wire is hard to see but it is yellow and at the very top right hand corner. While I am still a novice, I determine pin 8 as the first pin to the right of the keyway counting clockwise as viewed from the bottom. Unfortunately, I am just not sharp enough yest to determine where that wire should connect to in the chassis. It almost looks like it should go to a ground point but I am not sure.
You haven't given us the model number of the set so I looked up the 6A8 pin assignment. Pin 8 is the cathode and pin 7 is a filament connection. Check your schematic and you'll probably find the cathode is grounded and so is one side of the filament.
I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line surrounding the tube in the schematic). If the 6A8 is a metal tube then pin 1 Wil be connected to the metal shield and should also be grounded.
(This post was last modified: 8 hours ago by RodB.)
Maybe this is starting to make some sense in my hard head. Is this why the wire in question was not in the great Ron Ramirez video of 37-640 of the wires to disconnect the IF unit? My 6A8 tube is a metal one and maybe his was glass. Does all this mean that I could connect the wire in question to any ground point? Perhaps my radio is a later production run since it also has aa Muter variable resistor for a bias instead of the large tubular Bias Resitor--Thanks John
You'll have to forgive me, I am not sure what you mean. Can you explain what you are really saying. If anyone does not know where the wire should connect, I would rather they just say so---Thanks, John
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. You should be able to check with an ohmmeter to see if it is already attached to ground. Maybe the wire is sending a ground connection to another point.
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires.
Why'n't you just trace it, where it goes, and then see in the sch what the possible connections are, and see which one is missing.
I see no big deal in doing it.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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