04-20-2009, 03:11 PM
Johnny,
I'm not sure how critical those transformer resistances are, but they sound really high to me, especially the primary. Did you measure them with the transformer wires disconnected?
I think I'd try to sub in your spare transformer. Did you replace all the rubber wires inside the transformer can? Wires probably aren't the problem, but you might try that and see if coil resistance changes. Otherwise, I'd say you have at least one bad winding in the transformer, probably both.
The transformer could be a problem, but it is likely that something else is keeping you from getting a tone when you put a signal on the 1st IF grid. The resistance change in the secondary of the 1st IF is not enough to have much impact on the DC bias of the 1st IF grid.
I'm not sure how critical those transformer resistances are, but they sound really high to me, especially the primary. Did you measure them with the transformer wires disconnected?
I think I'd try to sub in your spare transformer. Did you replace all the rubber wires inside the transformer can? Wires probably aren't the problem, but you might try that and see if coil resistance changes. Otherwise, I'd say you have at least one bad winding in the transformer, probably both.
The transformer could be a problem, but it is likely that something else is keeping you from getting a tone when you put a signal on the 1st IF grid. The resistance change in the secondary of the 1st IF is not enough to have much impact on the DC bias of the 1st IF grid.
John Honeycutt
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