Re: DIY Amplifone Yoke

In article MdntTrain wrote:

What were the Amp yoke's number of windings and inductance that you were
trying to match?

I'll have to check the exact number but from memory it was 98 windings on the
original. Al kossow posted the specs of several yokes 11 years ago (EEK! it
only seems like yesterday :)

http://groups.google.com/group/rec.games.video.arcade.collecting/msg/62ee9a0badbfa9b8

2) You also wrote that you only changed the vertical coil. Why is
that? Did the horizontal one already match closely in inductance and
resistance?

Yes, I have the specs for the monitor somewhere.. But the H coil was designed
for very fast deflection speeds. IIRC it was like 8uSec edge to edge, so could
handle high horizontal deflection speeds no problem.

The DC resistance of the horizontal winding was approximately 2ohms, with
induction 2mH.

I don't think I put this in the original post but the supply I was using was
running +/-24v with a maximum current draw peaked at 1.8A

- James


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