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RE: What are your readings?

Lew,
I sent you a message with these readings and my whole Odyssey to date, but apparently you never received it. I'll try again.

Yesterday, I had a metrologist friend over to make impedance measurements. Configuration of back-plate: no resistors, no capacitor, no inductor, no brilliance control, midrange control +3. The results are below:
Impedance in Ohms
Freq (Hz) AU Black/Pos spkr term AU Black/Neg spkr term
(per instructions)
40 4 9.8
50 5 12
80 8.8 5.9
100 12 4.3
200 23 2.5
400 24 2.2
500 24 2.3
800 20 2.4
1,000 17 2.6
2,000 7.4 4.5
4,000 3.4 4.8
5,000 2.7 3.5
8,000 1.9 1.6
10,000 1.6 1.2
16,000 1.3 .58
20,000 1.3 .46
In-phase hookup shows a more benign load (higher impedance) for the amplifier; but even then, the impedance at the higher frequencies is awfully low for any amp, but especially an OTL.

I found out about the tube problem after I did these measurements.

Regards,
Chuck



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