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Philco 112 speaker to permanent magnet
dirkbuddy
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Posts: 39
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Joined: Feb 2014
City: Medicine Hat, Alberta canada
#4

03-23-2018, 06:07 PM
Looking through my parts here I found a Jensen universal audio transformer,  atttached is the directions  looks like if I want to drive a 6 ohm pm voice coil I need to know the tube resistance.  I have push pull 47's.  Therefore if I look up the 47 tube in a tube manual am I looking for "load resistance"?   if so it is 7000 ohms.  So do I double that ( because i have 2 tubes)   so that would put me at 14000 .  if looking at this chart so on the secondary of the audio transformer would I use lugs 2 & 4 and go with what is close which would be 16000 under the 6 ohm column to connect my PM speaker to?


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RE: Philco 112 speaker to permanent magnet - by dirkbuddy - 03-23-2018, 06:07 PM



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  1. The PHILCO Phorum
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