CJ

Re: UTC Transformers
« Reply #20 on: January 15, 2020, 06:09:37 PM »
UTC LS-55   page 1
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


CJ

Re: UTC Transformers
« Reply #21 on: January 15, 2020, 06:10:20 PM »
UTC  LS-55 page 2
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #22 on: January 15, 2020, 06:10:57 PM »
UTC LS-68
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #23 on: January 15, 2020, 06:11:58 PM »
UTC LS-6L4  page 1
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #24 on: January 15, 2020, 06:12:37 PM »
UTC LS-6L4 page 2
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #25 on: January 15, 2020, 06:13:28 PM »
UTC LS-6S
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #26 on: January 15, 2020, 06:14:16 PM »
UTC M-1433
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #27 on: January 15, 2020, 06:14:50 PM »
UTC Ouncer 8
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #28 on: January 15, 2020, 06:15:28 PM »
UTC   P-12
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: UTC Transformers
« Reply #29 on: January 15, 2020, 06:16:11 PM »
UTC  UA 176 OPT
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


CJ

Re: UTC Transformers
« Reply #30 on: January 15, 2020, 06:17:10 PM »
UTC Y-6431  Fairchild 670 Control Input
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Re: UTC Transformers
« Reply #31 on: January 19, 2020, 09:49:51 PM »
UTC  A-26   Fairchild 670  Input  (used backwards)

Another one where the Sowter replacement isn't even the same ratio.   
Note to self:  Don't let c**ts wind you up

CJ

Re: UTC Transformers
« Reply #32 on: January 21, 2020, 12:15:46 AM »
he might have been taking direction from the Drip guy, possible circuit mods,
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

EmRR

Re: UTC Transformers
« Reply #33 on: January 21, 2020, 08:29:51 AM »
Another one where the Sowter replacement isn't even the same ratio.

Always much lower DCR too, nothing like the old winding intended to replace.  Hammond appear to be the only company still making old style higher DCR smaller wire gauge small signal transformers. 
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde

rackmonkey

Re: UTC Transformers
« Reply #34 on: January 21, 2020, 08:49:30 AM »
Always much lower DCR too, nothing like the old winding intended to replace.  Hammond appear to be the only company still making old style higher DCR smaller wire gauge small signal transformers.

Interesting. The lights just went on. I’ve developed quite the love for the 850 series over time. Maybe that explains the attraction.
« Last Edit: January 21, 2020, 08:53:16 AM by rackmonkey »
Whether you think you can or you think you can't, you're probably right.

Re: UTC Transformers
« Reply #35 on: January 21, 2020, 01:28:02 PM »
I know Brian Sowter is more than capable of winding transformers that are good replacements for old units so I don't know where the info for his Fairchild  transformers came from?  His units do predate the Drip thing as they were being used by others before Drip was Drip.
Anyway... ?
Note to self:  Don't let c**ts wind you up

CJ

Re: UTC Transformers
« Reply #36 on: January 21, 2020, 02:29:54 PM »
the 670 outputs are very nice, he did away with some stability issues prevalent in the original chi town iron, but they are $$$!
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Re: UTC Transformers
« Reply #37 on: January 22, 2020, 05:10:52 PM »
the 670 outputs are very nice, he did away with some stability issues prevalent in the original chi town iron, but they are $$$!

I assume you're not talking about the original Triad HS-52 outputs on the Fairchild. 
Note to self:  Don't let c**ts wind you up


 

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