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In Reply to: RE: Hitachi 6SN7GTB question: Top getter vs bottom getter tube posted by Amphead on May 07, 2017 at 15:16:56
Amphead:
Your letting our secret out concerning the quality listening available in Japanese tubes :) BTW, if you like those tubes when they come in the mail, I see there is a lone tube on ebay being sold as a " Raytron 6SN7GT " It is being sold " as is " But the price isn't bad. Not sure what yours looks like from the top, but it appears to be the same as yours. I have a bunch of Japanese tubes stamped " made in usa " but clearly Japanese. Strange what companies did back then.
Speaking of Bad Boys: I purchased 6 pair of these tubes in the pic about 10 years ago for $16 a pair! I still haven't figured out what they are other than something out of the 50s-60s era. They are labeled Haltron, so they could be from anywhere. My guess is they are Russian. I can tell you they spanked the Bad Boys in a A/B test in my pre!
Follow Ups:
Waterfall:
You may be right about keeping quite about Japanese tubes. There is still a good amount of "snob" bias out there from many I'm sure have not even given them a try.
The tube you posted is not the same tube as the Hitachi's I have. My pair is already in my headphone amp, or I would take a close-up. So I copied two photos from the web that shows the construction and are posted above.
I spent a good amount of time checking EVERY detail of the internals of the Tel-Rad labeled ones I purchased. Also, the print on the base (6SN7-GTB) has a distinctive print style of letters and numbers, and the Tel-Rad and Hitachi are a match there also.
Amphead:
Who is making a 6SN7 headphone amp?
WaterfallI have a Woo Audio WA6 which I purchased new in 2012. It came with two 6DE7s and a 274 rectifier. However, it can use a pair of 6SN7's with socket adapters ( available from Wood Audio ) which I purchased two of at the same time, as I intended to use the 6SN7 from the get-go. I prefer the 6SN7 over the 6DE7, not to mention there are way more 6SN7 tube options vs the 6DE7. I also use a 1961 vintage Mullard GZ34 for the rectifier position. I love this tube amp and it drives both my Dennon AH-D7000 and Sennheiser HD600 phones very well.
Some other 6SN7 headphone amp makers I know of ( past and present ):
1. Darkvoice 336i ( discontinued )
2. Darkvoice 336SE ( Currrent model )
3. Single Power PPX3 ( discontinued )
4. Dragon Inspire IHA-1 ( Current model , but not cheap @ around $1600 )I have heard both the Darkvoice units, which are decent sounding enough, but I prefer the Woo Audio WA6. For what it's worth, a new version of the Woo Audio WA6 came out this year and no longer supports 6SN7's from what I understand.
Edits: 05/16/17 05/16/17
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