Anyone know anything about these or the quality of them & what I could use them for in DIY ?
Heres pic
Well they came from unidentified apart from the make EMI tape
recorders....see this thread ...sorry pics are extra large tho...
http://www.groupdiy.com/index.php?topic=26678
Questions ..
would this quality be any good, I think these recorders they came from were semi domestic
Are the trans made by EMI...or who
the round thing in the centre has 1 coil on it is hand written type 728 ? IS this an inductor?
DC resistance with my cheap digital multimeter of 20.3 Ohms ...again any use for DIY ?
The one on left in centre has 944 stamped on it the one below it has a***rans is that altrans ? type 208 .... that one came out of a 1940s wave meter..any any use for DIY?
these two look very similar maybe both made by altrans ?
The top & bottom centre two on there sides top has 92925D on it bottom has 913 on it..they were from the EMI tapes mic inputs I think..again is quality any good ?
Finally the big one its quite a lump has A4 plus another unreadable stamp on the top on the other side on the coil covering is stamped 1428* cant read last digit..it has 600 Ohm output with centre tap that went straight to U pad on top 3X150 Ohm res then to 600 Ohm OP socket theres also 2 terminals marked 0 & 15...could that be 15 ohms output for speaker ?
it measures 3.9 Ohms DC with my meter & 600 Ohms measures 22 Ohms DC. I fed it output from my redd DIY & got decent sound from 600R output..
wondering if it would take HT thru its primary ? for my other BA type pres, how do I find that out without cooking it? if I cant obtain info on it
Maybe its old junk but thanks for looking
Heres pic
![](https://proxy.imagearchive.com/1c7/1c715649d0dcea561eda34fff7e921e1.jpg)
Well they came from unidentified apart from the make EMI tape
recorders....see this thread ...sorry pics are extra large tho...
http://www.groupdiy.com/index.php?topic=26678
Questions ..
would this quality be any good, I think these recorders they came from were semi domestic
Are the trans made by EMI...or who
the round thing in the centre has 1 coil on it is hand written type 728 ? IS this an inductor?
DC resistance with my cheap digital multimeter of 20.3 Ohms ...again any use for DIY ?
The one on left in centre has 944 stamped on it the one below it has a***rans is that altrans ? type 208 .... that one came out of a 1940s wave meter..any any use for DIY?
these two look very similar maybe both made by altrans ?
The top & bottom centre two on there sides top has 92925D on it bottom has 913 on it..they were from the EMI tapes mic inputs I think..again is quality any good ?
Finally the big one its quite a lump has A4 plus another unreadable stamp on the top on the other side on the coil covering is stamped 1428* cant read last digit..it has 600 Ohm output with centre tap that went straight to U pad on top 3X150 Ohm res then to 600 Ohm OP socket theres also 2 terminals marked 0 & 15...could that be 15 ohms output for speaker ?
it measures 3.9 Ohms DC with my meter & 600 Ohms measures 22 Ohms DC. I fed it output from my redd DIY & got decent sound from 600R output..
wondering if it would take HT thru its primary ? for my other BA type pres, how do I find that out without cooking it? if I cant obtain info on it
Maybe its old junk but thanks for looking