Recently became a new Drake TR-4 owner via eBay. Got lucky and the radio appears to be in pretty good shape. Purchased a Turner +3 mic to go with it and fixing to go through the radio cleaning switches, pots, relays, etc to try and get her in top shape. Got a fan to do a mod with that on the finals. First lesson Mic plug is not a ¼ plug Ha! Ha! So muddled through that one.
Here is my question . When looking at the radio from the front, on the left side, towards the bottom of the cabinet, there is a pot with a knob, that is adjustable and has a off (I assume) position. It is labeled, by an owner Max and Min. In receive, it appears to have no effect. I havent been able to place the unit in transmit yet to see if it has any effect there. I know the info here is sparse . But I figured some of you guys that have forgotten more about these radios than I will ever know may have a clue as to what this mod is . If not, when I take her apart Ill try and trace it down and see where it goes . Geez, this radio sure sounds good .. Thanks in advance for any help . Ken KB4MUV
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