diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Tubes / Valves (http://www.diyaudio.com/forums/tubes-valves/)
-   -   Freed transformer info needed (http://www.diyaudio.com/forums/tubes-valves/179820-freed-transformer-info-needed.html)

jono1 26th December 2010 03:37 PM

Freed transformer info needed
 
I made a very fortuitous purchase of a stash of tube gear from a friendly elderly gentleman who was trying to simplify his life and clean out his basement!

Among the amps & et. was a pair of mono blocks with separate power supplies (4 chassis in all) that were builds of a Freed Hi-Fi amplifier, based upon a May 1954 spec sheet and circuit diagram. (Some may recall that Freen made the iron in the Citation II).

The circuit was a basic Williamson design, using 6SN7s for amps and drivers and 5881s for output tubes.

Included were some very rare Freed transformers, including a pair of KA-10 UL output trannies. These have a 6.6K primary and 8/16 secondaries. The manufacturer's published response curves are better than anything I'd ever seen. When i get some time, I'll scan and print the spec sheet.

I'm contemplating a new amp build with a mu-follower driver circuit and El34s.

In the meantime, I wonder if anyone else:

1. Is familiar with the Freed KA-10 OPTs?
2. Knows the specs for the Freed KP-10 power transformer;
3. Ditto for the KC-10 and KC-11 "filter reactors". i.e. chokes

Thanks in advance!


All times are GMT. The time now is 09:16 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2