In the 70s, you could buy Mac power amps for about $1/Watt. The high power wars were going on with new solid state amps like Crown and Phase Linear 700, and of course monster Japanese receivers with "IHF" power specs. An MC240, with only 40W/channel, looked dated. Over a few year period I bought about a dozen Macs for under $100 a piece: 240s, 225s, etc. Whenever I saw one collecting dust in the back of a HiFi store (they'd take them in trade) I bought it. I sold most in the late 90s when I realized they were rusting in my garage. Now they'd almost pay for a house!
Hammond H300767 Winding DC Resistances
These measurements all done by the 4-Terminal method, eliminate test lead & contact resistance. ALL the leads are brought out, not connected as shewn on the dwg. The results indicate the transformer was wound serially.
No attempt to balance the opposite sides of the primary, but no matter the signal is across the ends(bridge output). The CT doesn't matter. it is simply a DC return for some low level circuitry.
Only those with bat's ears could claim they hear a difference. As they often do, without proof!!
These measurements all done by the 4-Terminal method, eliminate test lead & contact resistance. ALL the leads are brought out, not connected as shewn on the dwg. The results indicate the transformer was wound serially.
No attempt to balance the opposite sides of the primary, but no matter the signal is across the ends(bridge output). The CT doesn't matter. it is simply a DC return for some low level circuitry.
Only those with bat's ears could claim they hear a difference. As they often do, without proof!!
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