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Old 19th November 2005, 05:42 PM   #21
kevinkr is offline kevinkr  United States
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Hi Bas,
Sounds good!

Kevin
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Old 29th November 2005, 11:11 AM   #22
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Transformer is in hand (1) only. So I will be testing mono.
Pictures this evening.
Core : R-Core.
Datasheet attached.
Attached Files
File Type: pdf headphone_ot.pdf (11.8 KB, 279 views)
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Old 29th November 2005, 05:57 PM   #23
kevinkr is offline kevinkr  United States
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I looked over the spec. When you put windings in parallel this does not change the ratio of turns primary to secondary therefore the impedance transform is the same for a single winding or all three in parallel.

Also putting them in series will result in the impedance scaling as the square of the number of turns so that doubling the turns in series will result in 4 times the reflected impedance at the output.

etc..

Kevin
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Old 29th November 2005, 06:07 PM   #24
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Quote:
I looked over the spec. When you put windings in parallel this does not change the ratio of turns primary to secondary therefore the impedance transform is the same for a single winding or all three in parallel.
You are correct!

http://www.sowter.co.uk/specs/8665.htm

I only understood what you were saying after looking at the Sowter specs. Each winding has it's own turns ratio.
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Old 30th November 2005, 04:39 PM   #25
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Updated datasheet I got :

The first one was hurriedly made up for me.
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File Type: pdf hptrans.pdf (14.6 KB, 153 views)
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Old 16th December 2005, 08:45 PM   #26
00940 is offline 00940  Belgium
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any update?
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Old 16th December 2005, 09:21 PM   #27
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The final datasheets part1
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File Type: pdf hptrans.pdf (14.5 KB, 87 views)
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Old 16th December 2005, 09:21 PM   #28
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part 2
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Old 16th December 2005, 09:31 PM   #29
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Click the image to open in full size.

Next to an ecc99 for scale.
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Old 18th December 2005, 07:33 AM   #30
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Default Balanced output?

Hello,

The transformer is shown in a schematic for a headphone amp.
Could this configuration also be used as a preamp to drive an asymmetrical or even balanced output?
Can the transformer be wired like for instance a 600 ohm drive?

Best regards, Arjen.
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