Am I close? Appreciate your input on this. (except part number 379WX - uses a separate 60VAC 0.2 Amp winding). Bias Tap: 50 VAC tap from high voltage secondary C.T. If the transformer doesn't have an input for the ground that will likely need to go somewhere else for safety so although the hook up is neglected for the transformer it is very likely still required elsewhere.

NOTE: units are designed to operate with BOTH primary windings engaged. If it was me, just based on the numbers here and what little I know about basic electricity, I wouldn't do help me out on this. Key Features: Primary: Universal - 100, 110, 120, 200, 220, 240 VAC 50/60 Hz. The amp builder types can correct me on this but my hunch is that if I follow ohms law on this, it is likely that the 100 watt xformer will draw 2X as much current from the output tube plates than they were designed to handle, i.e. The 100 watt output presents a 1700 ohm load to the plates, the 50 provides almost double that at 3.6K. Below, three Haddon output transformers from 1960, 1961, and 1962/1963, respectively. I'm not an amp builder but I know a bit about electric stuff.

It shows the ohms resistance to the plates and the output wire colors. Well, nearly right - they shop supplied you with a 230 volts AC rated transformer so, on a supply of 220 volts, you can expect the 24 volts AC output to be around 23 volts RMS. Since I have 220V AC, I asked the electrical store for a 220VAC to 24VAC transformer. I found this on Amplified Parts site for a PTM-100 output transformer. No, the two transformer windings are isolated from each other. I noticed these are listed as to power tube type, and you want to be sure of the connections.

Output transformer wire color codes