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Old 12th April 2006, 05:09 PM   #1
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Default Hashimoto Se Output Transformer

Has anyone had experience using these HASHIMOTO SE OUTPUT TRANSFORMER H-203S output transformers?
Click the image to open in full size.
Very nice looking and quite affordable.
More information can be seen here:
http://www.obsinc-products.com/servl...-+Single+Ended

Any feedback is appreciated.

dr._sleep
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Old 12th April 2006, 08:39 PM   #2
Rocky is offline Rocky  Norway
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I hope you didn't got tricked by the fact they are priced per piece not per pair.. Looks good though, and $500 plus shipping from Japan isn't all that bad either.. But in that price range it still has to compeat with AE, Tribute, Tango...
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Old 13th April 2006, 01:48 AM   #3
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Hi,
No experience yet, but I just picked up a pair of Hasimoto H-20-3.5U's while in Tokyo last week. Still jet lagging , but plan on putting these trannies in my mono blocks as soon as I feel up ot it

Regards,
Danny
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Old 13th April 2006, 05:02 PM   #4
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Thanks, I was looking at the 203S, 7 watts, for an EL34 SE amp.
They are $165 each and the company that distributes them is in the US. $165 beats Sowter, Electroprint, etc.

I may have to take a chance on them.

dr._sleep
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Old 10th May 2006, 02:09 AM   #5
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Hi dr._sleep,

Just wondering if you ever decided on the Hashimoto OPT's? I replaced my Hammond 1627's with the H-20-3.5U's a few weeks ago and have been very pleasantly surprised with the difference in the sound. Highs are more extended, mids seem more, I don’t know, perhaps more liquid and the bass region is tighter. The Hammonds seemed to have a bit more slam in the bass regions, but IMO music through the Hashimoto’s sounds much improved. I don’t know if I can explain this correctly, but during one song by the group Foreplay, I can hear the piano notes resonate for what seems like seconds longer than with the Hammonds.

Other than chasing a hum tied to using unshielded wire on my signal line and a few unsightly holes in my chassis due to the smaller size of the Hashimoto, the swap went real smooth.

Regards,
Danny
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Old 22nd May 2006, 12:18 PM   #6
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Hi Danny!

What is your amp details?

300B SE?

thx,
cartman
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Old 23rd May 2006, 03:50 AM   #7
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Hi cartman,

I built the JELabs 300b circuit using Hammond 1627 transformers. I then swapped out the OPTs with Hashimotos and am really enjoying the tunes.

Take a look and my poor excuse of a web site for some photos. Sorry, but I have not uploaded any photos of the new iron.

dg
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Old 24th May 2006, 04:31 AM   #8
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Hi cartman,

I uploaded a few pictures of the Hashimoto H-20-3.5U transformers installed in my monoblocks for you viewing. Take a look at my site and drill into upgrades under jelabs300b monoblocks.

Thanks,
Danny
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Old 24th May 2006, 05:09 AM   #9
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Thx Danny,



GREAT!!!
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Old 24th May 2006, 05:18 AM   #10
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Which type of your capacitors?
Especially the audio signal .22uF?

What do you thik the Audio Note 300B schematic?

(I'm looking for the "best" schematic...)
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