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Chicago Standard BO-14 100W outputs

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dshortt9

dshortt9

Member
Joined 2001
Before I put these on e-bay anyone interested? I have three.
One is NOS no rust but a few minor scuffs. One NOS just a little rust starting. One is used and rusty. Buy two and get a spare.

Chicago super range BO-14 output transformers

http://208.190.133.201/old_iron/CHICAGO1958/024.jpg

100 Watts 5000 ohm primary with screen taps. 10% tertiary winding for cathode coupling! 8, 16 and 70.7 v secondary. BIG Hermetic Macintosh style cases. 21 pounds each. Use 4 tubes and get 2500 ohm primaries with 4 and 8 ohm taps.

I have an article that goes with these to make some excellent 100w pentode w/ cathode feedback or 40 watt triode w/ cathode feedback. Shows specs, theory, schematics.

Selling because I bought these then found the ones I really wanted, Dynaco A440's
 
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