transformer data request

maybe someone could point me to some infos regarding this plate to speaker transformer.

the dc resistances i´ve measured:
yellow-white 620 ohm
green-brown 8,6 ohm
blue-red 0,4 ohm

whats the green-brown 8,6 ohm winding supposed to be??

> plate to speaker transformer.

Where does it say plate to speaker?

It appears to say 70 and 100. These are common speaker-line voltages for large-area distribution systems. If so, it must also have a Watts rating.

If it is a speaker-distribution transformer: it won't take any DC, it won't take more than 70 or 100 volts audio in the deep bass, and low-price distribution transformers can be violently sick below 100Hz.

[quote="PRR"
It appears to say 70 and 100. These are common speaker-line voltages for large-area distribution systems. If so, it must also have a Watts rating.
[/quote]

it says m70 m100, regarding the iron i guess.

also i´m pretty shure that the blue-red 0,4 ohm winding is speaker out (for 5ohm speakers), because a fat wire is used, too fat for a feedback winding.

another thought: the green-brown 8,6 ohm winding could be build in choke?

speaker winding wouldn't be loud at 8 ohms, but could be with 0.4 ohms.

8 ohmer might be a feedback, or this could be a plate >600 ohm/spk combo unit.

[quote author="CJ"]this could be a plate >600 ohm/spk combo unit.[/quote]

i didnt know such thing exists. cool :thumb: