Bo Hansen
Well-known member
Muffy, and you others who have thought about the size of C414 transformers.
The transformer Ü35 used in C414E1, EB, C451E, EB and C452 with a ratio slightly less than 1,4:1 and Ü54 which is only found in C414EB-P48 with a ratio of 6:1, have a smaller size of U-lamination and also a smoother bobbin than T14 style that many mention in this context.
Ü35 and Ü54 have a lamination/core package that is only 5 mm. thick and a bobbin that is 10 mm. thick "around the belly" and 15 mm. wide, and these are the absolute maximum dimensions to fit in these microphones.
The length of the laminate/core is 25 mm. and width is 10 mm. but these measurements can be a few millimeters larger without problems.
Since I will not build or clone these microphones, I only repair and renovate these, maybe 20 or so a year in a mixture of the ones I mention above, I have to find or have someone make replacement transformers that both fit physically and also in output level and sound character.
Some of you have probably been inside one of the older C414s and seen how enormously crowded it is, especially at the bottom where the transformer is mounted.
It has even made a cut-out in the bottom of the frame to make room for the transformer bobbin.
The outer casing is the narrowest at the bottom where the transformer is mounted on the inside, it is even so that the original bobbin rubs against the inside of the outer casing, so a transformer/bobbin that is a few millimeters larger will not fit.
Regarding Peluso's version of C414, they have a completely different housing with more space on the inside where a much larger transformer can fit, for example T14 or similar.
They can also of course choose a transformer with a higher ratio, for example 12:1, if they have copied C414EB-P48, but it will result in much lower output level compared to the original..
If it is C414E1 or EB they have copied and has a transformer with a ratio of 12:1 instead of 1,4:1, yes, as you can calculate yourself, of course it will be extremely low output compared to the original.
(maybe they mean 2:1, not 12:1)
So I guess there's some misunderstanding, otherwise I would be very surprised.
--Bo
The transformer Ü35 used in C414E1, EB, C451E, EB and C452 with a ratio slightly less than 1,4:1 and Ü54 which is only found in C414EB-P48 with a ratio of 6:1, have a smaller size of U-lamination and also a smoother bobbin than T14 style that many mention in this context.
Ü35 and Ü54 have a lamination/core package that is only 5 mm. thick and a bobbin that is 10 mm. thick "around the belly" and 15 mm. wide, and these are the absolute maximum dimensions to fit in these microphones.
The length of the laminate/core is 25 mm. and width is 10 mm. but these measurements can be a few millimeters larger without problems.
Since I will not build or clone these microphones, I only repair and renovate these, maybe 20 or so a year in a mixture of the ones I mention above, I have to find or have someone make replacement transformers that both fit physically and also in output level and sound character.
Some of you have probably been inside one of the older C414s and seen how enormously crowded it is, especially at the bottom where the transformer is mounted.
It has even made a cut-out in the bottom of the frame to make room for the transformer bobbin.
The outer casing is the narrowest at the bottom where the transformer is mounted on the inside, it is even so that the original bobbin rubs against the inside of the outer casing, so a transformer/bobbin that is a few millimeters larger will not fit.
Regarding Peluso's version of C414, they have a completely different housing with more space on the inside where a much larger transformer can fit, for example T14 or similar.
They can also of course choose a transformer with a higher ratio, for example 12:1, if they have copied C414EB-P48, but it will result in much lower output level compared to the original..
If it is C414E1 or EB they have copied and has a transformer with a ratio of 12:1 instead of 1,4:1, yes, as you can calculate yourself, of course it will be extremely low output compared to the original.
(maybe they mean 2:1, not 12:1)
So I guess there's some misunderstanding, otherwise I would be very surprised.
--Bo
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