Tekay
Well-known member
Hi!
Did some tests last night, since the OEP A262A2E is a cheap alternative for DIY pre's.
Will do more tests later on too see how the 1:12.9 can be improved.
Best results where when using only one prim / sec windings. See redings with the two sec windings in serie.
Zobel network is a 4k7 resistor in serie with a 3n3 styrol cap over a 3k3 resistor over the secondary winding.
Did a lot of testings with different values for the zobel resistor and cap but this was the best I could get it.
Since some OEP people use to work at Belclere who did transformers for Neve I will do some tests on the Belclere EM20015 / TF10015 to see if they are similare.
The Belclere looks very much like the OEP and was used as input transformer in some versions of Neve's last class A pre 31102. (1978) Also used in the 33609 limiter/compressor
OEP at RS Components 210-6425
OEP at Farnell 149-156
Did some tests last night, since the OEP A262A2E is a cheap alternative for DIY pre's.
Will do more tests later on too see how the 1:12.9 can be improved.
Best results where when using only one prim / sec windings. See redings with the two sec windings in serie.
Zobel network is a 4k7 resistor in serie with a 3n3 styrol cap over a 3k3 resistor over the secondary winding.
Did a lot of testings with different values for the zobel resistor and cap but this was the best I could get it.
Since some OEP people use to work at Belclere who did transformers for Neve I will do some tests on the Belclere EM20015 / TF10015 to see if they are similare.
The Belclere looks very much like the OEP and was used as input transformer in some versions of Neve's last class A pre 31102. (1978) Also used in the 33609 limiter/compressor
OEP at RS Components 210-6425
OEP at Farnell 149-156