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M

mylesgm

Well-known member
Joined
Feb 21, 2009
Messages
831
Location
melbourne, Australia
I've got a few western electric transformers that I'm looking for specs on.

WE 233d input transformers

WE 186b and 186c output transformers

WE Repeat 109a

Any info?
 
186B looks like 200-3.5K, 175:30K imp ratio pri 1-2, sec 3-4 & 5-6

186C - 200-3.5K, 1K:12K imp ratio  pri 2-1 & 6-5, sec 4-3 & 8-7
 
233D input 20K:50K, 60-5kHz  looks like split windings on both sides
186B output 30K:175 voice
186C output 12K:1K voice
109A repeat 30:27K 1K (yes, only 1K) freq range; for?  Inductance for pri stated as minimum 0.1H

from 1947 data  what are your date stamps?
 
These things are huge and heavy!  I think the date stamps are 2-44 and 3-44 they are the only numbers that are 233d etc.  I've had the 233d running on an output stage getting a signal way past 10k and looking like it rolls of above my audio playback...  Does that seem right?

M
 
Sometimes the WE freq. specs are right, sometimes they are 'worst case' or 'intended use', and they can change over decades of production and revision.  I wonder if they are not also a comment on phase accuracy with regards to intended phone co. circuits.  233D for example, it'd be real hard with such a low ratio to screw up the response much. 
 

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