Using a t-2052 build up a test fixture, a pulse generator and​ a oscilloscope and if have access to one a high bandwidth current probe. Use the 2052s you have, record the curves etc and then make up some test transformers.
-Pete component engineer in a former life. On Apr 13, 2017 3:36 PM, "Vincent Slyngstad via cctalk" < cctalk@classiccmp.org> wrote: > I realize it's a long shot, but does anyone have: >> > > - Any spare T-2052s (or know of a source) >> - Any idea what the T-2052 *was* so I can try to replace them. I haven't >> found much detail as of yet. >> > > Good news on this front! > > I had previously obtained a data sheet for the T2037, a similar > transformer. > > I extracted 4 each T2037 and T2052 from a broken G228, and today I was > able to get measurements off of them: > > T2037: > A: 230uH, 170 mohm primary, 42.9uH 100 mohm secondary > B: 220/170, 41.6/100 > C: 232/170, 43.8/60 > D: 231/170, 43/80 > > These are consistent with 16 turns and 7 turns of #33 wire, wound on an > FT37-77 toroid per the instructions on the data sheet, and also with the > 220 uH /43 uH 20% specs that appear there. > > Here are the T2052 measurements: > A: 597/320, 597/320 > B: 530/270, 530/270 > C: 34/1040, 24/680 > D: 551/280, 551/280 > > Ignoring "C", which is quite likely broken in some way, these are > consistent with a 25 turn 1:1 transformer. I'm not sure what they are > wound with, as #33 wire should give a lower DC resistance. > (#34 is closer. It's also possible that they changed cores, but I suspect > that they are also wound on FT37-77 cores.) > > It's possible that a fairly standard modern 1:1 pulse transformer could be > substituted. The 78615/2JC, for instance is 500uH, 1:1 if you ignore the > center tap pins. > > Vince >
