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Old 2nd August 2008, 04:57 PM   #11
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hey-Hey!!!,
That would make a nice IT. 2k CT to 600 CT is a 1.83 step-down. Or for headphones... The frequency response is a bit light( 50 to 10k cps. ), but depending on the loading you can probably reduce power and gain some there.
cheers,
Douglas
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Old 2nd August 2008, 07:07 PM   #12
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Quote:
Originally posted by Bandersnatch

2k CT to 600 CT is a 1.83 step-down. Or for headphones... The frequency response is a bit light( 50 to 10k cps. )

My eyes see it as 9000 ohms CT. This is a mil. spec. transformer and 50-10,000 ~ is what the Government needed and wanted to see written on the part. It's been my experience with transformers like this that the bandwidth could be considerably more. Especially at less then rated power.

Victor
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Old 2nd August 2008, 10:25 PM   #13
Tweeker is offline Tweeker  United States
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On photographed OPT: It is for PP use, doubt it will work well SE unless in parafeed etc. Id try a pair of EL84s. Red Light District is one of many example much information can be found on.

El34s as unbypassed triodes, cathode biased might work quite well.
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Old 3rd August 2008, 02:38 PM   #14
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Quote:
Originally posted by Tweeker
On a cheaper (less interleaved) transformer, it can simply be because the turns get longer as you get further from the core. Each side has the same number of turns, but the ones further from the bobbin are longer and thus have higher resistance.

I do not see a schematic.
It can be done to get both sides of the CT the same length( with the same turns count, and thus same resistance). It is not a function of interleaving, but of interleaving for that end. I suspect that focusing on better couplilng instead of equal resistance is a better idea. Compared to the Dynaco/Acrosound style it is easy to get closer to equal length/equal resistance halves with more complex interleave.
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Douglas
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Old 3rd August 2008, 02:42 PM   #15
Tweeker is offline Tweeker  United States
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What I meant is if there is little to no interleaving, say a guitar opt, the difference will be quite large. Getting them the same length isnt the point, as you mentioned.
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