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Search good performance HEADPHONE TRANSFORMER
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Old 18th June 2008, 11:26 AM   #1
bigdogwang is offline bigdogwang  China
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Default Search good performance HEADPHONE TRANSFORMER

Hi Forediyer,
I want to search good performance outport transformer for my HEADPHONE AMPLIFIER. It use 5842 or 5687 Tube. Could you recommond some brand of outport transformer.

I only know Sowter and Lundahl. How do you think their sound?

Thank you.
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Old 18th June 2008, 01:00 PM   #2
Stixx is offline Stixx  Germany
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Hi,

I guess you are looking for an SE transformer...
Jack Elliano at Electraprint will wind you one (I am quoting dsavitsk here... ), and according to dsavitsk they also sound very good. Lundahls should be worth their money also...

I am currently using Hammond 119DA line matching transformers in my Aikido parafeed headphone amp. They really surprised me in how good they sound for the money.
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Old 18th June 2008, 03:52 PM   #3
kevinkr is offline kevinkr  United States
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Search good performance HEADPHONE TRANSFORMER
I'll second the recommendation for electra-print as I have a pair of custom designed 5K:32 (or 8) output transformers in my headphone amplifier - this is a good choice for the 5842 and 5687 as well.
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Old 19th June 2008, 08:22 AM   #4
pkjames is offline pkjames  Australia
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I know the HAMMOND 119DA is also used in the Mapletree audio EAR+ HD series.

Does anyone know where can I buy the 119DAs?
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Old 19th June 2008, 10:02 AM   #5
bigdogwang is offline bigdogwang  China
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My circuit is volume controller + one 5842 tube + output transformer + HD600 headphone.
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Old 19th June 2008, 10:10 AM   #6
Gordy is offline Gordy  United Kingdom
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The Sowter seems to have a good reputation. It is for AC coupled only, so for parallel feed.


As for single-ended see Figure 3 on this page...

http://headwize.com/projects/showfil...ciuff4_prj.htm


: )
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Old 19th June 2008, 10:25 AM   #7
bigdogwang is offline bigdogwang  China
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Some user say about Lundahl: high frequency is good, but low frequency is so so.
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Old 19th June 2008, 10:31 AM   #8
Brett is offline Brett
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Quote:
Originally posted by bigdogwang
Some user say about Lundahl: high frequency is good, but low frequency is so so.
Absolutely not true in my experience if the cct is designed correctly.
I have used quite a bit of Lundahl iron.
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Old 24th June 2008, 09:04 AM   #9
bigdogwang is offline bigdogwang  China
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I research Lundahl web, there are 2 parts, LL1630 and LL1680.
How are their different? Which is better for 5842 or 6SN7 ?


http://www.lundahl.se/pdfs/datash/1630.pdf
http://www.lundahl.se/pdfs/datash/1680.pdf
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Old 4th September 2015, 05:33 PM   #10
rongon is offline rongon  United States
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Search good performance HEADPHONE TRANSFORMER
Even though this is a 7 year old thread, I found something relevant to add. I hadn't seen this before, maybe it's new, but Edcor makes an interesting looking version of its 10 watt single-ended OPT with an 8k primary and 50 ohm secondary. That should be good for many headphones.

https://www.edcorusa.com/xse10-50-8k

I have no idea what the primary inductance is, though. The frequency response is claimed to be down -1dB at 70Hz. The specs for the version with 8 ohm secondary says primary DCR is 147 ohms and inductance is 4H. I don't see how that adds up, but there you have it. FYI, FWIW, YMMV, and so on.

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