05-13-2012, 03:57 PM
1. So, anyone knows the Z-9s262 audio xfmr winding parameters, or where to find them?
(The tube datasheet says 7K impedance, so need to match my speaker voice coil which is 1.6 Ohms, so I need the ratio of 66).
2. Also,
It seems like the audio secondary connects to the voice coil via a turn of wire going around the field coil. Anyone knows why it is?
3. What the heck is the "M" in their resistor specs? It is not Mega for sure, as they then wrote it as "Megohms"; also values like 220 MOhms don't make sense.
For example, R1 - 22 M Ohms.
I'd measure them, but most are off, so it will be twice what it may be in the specs.
http://www.nostalgiaair.org/PagesByModel...025500.pdf
(The tube datasheet says 7K impedance, so need to match my speaker voice coil which is 1.6 Ohms, so I need the ratio of 66).
2. Also,
It seems like the audio secondary connects to the voice coil via a turn of wire going around the field coil. Anyone knows why it is?
3. What the heck is the "M" in their resistor specs? It is not Mega for sure, as they then wrote it as "Megohms"; also values like 220 MOhms don't make sense.
For example, R1 - 22 M Ohms.
I'd measure them, but most are off, so it will be twice what it may be in the specs.
http://www.nostalgiaair.org/PagesByModel...025500.pdf
