vinyvamos
Well-known member
Hi folks! Long time listener, first time caller here . After doing quite a bit of research, and going through Dave P's great thread named "A BA-6A from scratch", I have now started building my own one. As I'm not flush enough with cash to splash out on Sowters and whatnot I am making do with what I could get from good friends. I do have some Edcors for input and output but I wanna try the vintage ones that I have first. Here is the trafo list:
Input: 1940s Kenyon input trafo (no P/N or data). Tests out to be 1:15 Vratio which is too high. Secondaries in series give 116H with open primary at 1KHz. Might have to swap that out for an Edcor as it is a mic input trafo, and even though it is big it might saturate easily. I guess it would give the unit some mighty gain, but would require a low-z drive into it.
Interstage: FTR FT-2614. Stated 20Kct:20Kct on the top, and both windings read 88H at 100Hz. Here's hoping this is enough as I have read a lot from you guys regarding this inductance issue.
Output: Stancor A-3800. Stated 5K:500R with 4,8,16 and 250 ohm taps. 30 Watts so over spec'd a bit. Tests have brought doubt into it's LF handling though as the primary reads only 3K6 ohm at 100Hz. Maybe this is not an issue, what do you think?
Input: 1940s Kenyon input trafo (no P/N or data). Tests out to be 1:15 Vratio which is too high. Secondaries in series give 116H with open primary at 1KHz. Might have to swap that out for an Edcor as it is a mic input trafo, and even though it is big it might saturate easily. I guess it would give the unit some mighty gain, but would require a low-z drive into it.
Interstage: FTR FT-2614. Stated 20Kct:20Kct on the top, and both windings read 88H at 100Hz. Here's hoping this is enough as I have read a lot from you guys regarding this inductance issue.
Output: Stancor A-3800. Stated 5K:500R with 4,8,16 and 250 ohm taps. 30 Watts so over spec'd a bit. Tests have brought doubt into it's LF handling though as the primary reads only 3K6 ohm at 100Hz. Maybe this is not an issue, what do you think?