dmlandrum

API 312 input and output transformers
« on: July 15, 2004, 06:07:13 PM »
I am building a pair of API 312s which will utilize the Melcor 1731 op amp. My dilemma right now, though, is that I was unable to get in on the necessary group buys at the time to obtain the input and output trafos I need to complete this project. In fact, I don't even know what brand or kind of transformers are needed. Is there anyone who can fill me in on this and where to get them?

Thank you all for your help!
Darren Landrum

Be comforted that in the face of all aridity and disillusionment
And despite the changing fortunes of time,
There is always a big future in computer maintenance.


Scenaria

API 312 input and output transformers
« Reply #1 on: July 15, 2004, 06:14:16 PM »
Dan alexander has the o/p trannys I think for around $28 ea

i/p welp.... its still in the works

API 312 input and output transformers
« Reply #2 on: July 15, 2004, 06:52:10 PM »
Hi Darren,

Check with Tommytones about the output transformers - he coordinated the group buy. Maybe he has some extras. I have no idea how long it could be before there are 2622 replacements. Hopefully not too long, but I guess we'll have to see.
Seth

The definition of insanity: "Hey, this thing could be really cool - if I had the money to fix it up, which I don't, but if I did it could be really cool - if I had the time, which I don't, but

CJ

API 312 input and output transformers
« Reply #3 on: July 15, 2004, 07:00:14 PM »
Jensen makes the output.
They even might have an input also.

I got the api link back up, had a little glitch at my site.
Click on UTC and then api:
http://www.vacuumbrain.com
cj
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

[email protected]

API 312 input and output transformers
« Reply #4 on: July 15, 2004, 07:27:48 PM »
You could use the Jensen 110K or the 115K on the input and pick one of the many 1:2 ratio output transformers from their list. I have a 123-ALCF  (1:3) for low impedance load testing.

soundguy

API 312 input and output transformers
« Reply #5 on: July 15, 2004, 07:30:25 PM »
everyone's taste is different, but I'd try to find a 1:7 input, Ive used a jensen 1:10 and didnt like it at all, but api uses a jensen 1:10 in the 3124, so go figure...

dave

chips are good with dip...

CJ

API 312 input and output transformers
« Reply #6 on: July 15, 2004, 07:30:27 PM »
Yes they make a lot of bi-filar wound line outputs that will work, anywhere from 66.7 to 600:600 ohms, in 50 or 80 nickel.

Look in the line output section.

http://www.comtran.com/

cj
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

tommytones

API 312 input and output transformers
« Reply #7 on: July 15, 2004, 09:49:21 PM »
I do have some outputs left from if you'd like.  Drop me a line...
ToM

He who asks is a fool for five minutes, but he who does not ask remains a fool forever.
Chinese Proverb

dmlandrum

API 312 input and output transformers
« Reply #8 on: July 16, 2004, 10:28:26 AM »
Wow, thanks guys! Such a wealth of information around here...

Tommy, I will drop you a PM...
Darren Landrum

Be comforted that in the face of all aridity and disillusionment
And despite the changing fortunes of time,
There is always a big future in computer maintenance.

 

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