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Old 26th January 2013, 03:16 AM   #4641
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Location: Victoria, Australia
Oatley Electronics of Australia is about to release the K272B HP kit based on the JAN6418 tube. I got an early prototype and assembled it. Harmonically rich sounding and better than a CMoy (I think).
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File Type: jpg K272B.jpg (262.2 KB, 1142 views)
File Type: jpg 6418-B_I.jpg (150.2 KB, 1076 views)
File Type: jpg 6418-B_II.jpg (135.8 KB, 941 views)
File Type: jpg 6418-B_III.jpg (141.2 KB, 906 views)
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Old 26th January 2013, 10:33 AM   #4642
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Quote:
This is the Mono Amplifier that I built for my friend Brian Kim. This is the very first SE amp of Hi Fi tube amp of his collection. It employs Lundahl's LL1623AM amorphous core output transformer, and LL1638 double choke filtering for the B+. Driver is with 7N7 tube and each stage with separate RC B+ filtering.
Awesome looks like a lot of premium parts in that one . How to you use the 7n7? 2 gain stages? or gain stage and cathode follower?
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Old 26th January 2013, 12:42 PM   #4643
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my new preamplifier, still on construction but nearly finished:
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Old 26th January 2013, 03:07 PM   #4644
wlowes is offline wlowes  Canada
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Smile 6C33C OTL

I am thrilled to finally post my first tube amp project. Thanks to all who have gone before me to offer insight and inspiration. Based on Bruce Rozenblit's patent (published in Audio Reality). 120w per channel. Sound is transparent, light and effortless with tons of deep bass. I am very happy with the result.
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File Type: jpg 6C33C pair assembled.jpg (320.8 KB, 432 views)
File Type: jpg tube amp finished - close up tube glow.jpg (290.8 KB, 419 views)
File Type: jpg tube amp finished - sitting room.jpg (409.8 KB, 359 views)
File Type: jpg tube amp finished - top shot.jpg (537.7 KB, 359 views)
File Type: jpg tube amp finished - underside.jpg (376.2 KB, 399 views)
File Type: jpg tube amp finished - input and drivers.jpg (252.4 KB, 396 views)
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Old 26th January 2013, 06:00 PM   #4645
Stixx is offline Stixx  Germany
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My C3G spud headphone amplifier is finally finished and playing music.

- C3G triode wired running at 145V / 15mA
- Cathode bias with tightly matched Morganite resistors and BG N bypass caps
- (yes, there is still people preferring a conventional setup over LED bias , but only when Black Gates are used)
- Salas SSHV2 with LC prefilter
- DC heaters
- Lundahl LL1689 wired 18:1
- custom wound toroid mounted on top
- all the guts underneath

Absolutely dead silent (Pitch Black background... ).
Attached Images
File Type: jpg c3g-spud-1.jpg (100.7 KB, 727 views)
File Type: jpg c3g-spud-4.jpg (120.1 KB, 690 views)
File Type: jpg c3g-spud-6.jpg (106.8 KB, 652 views)
File Type: jpg c3g-spud-7.jpg (198.4 KB, 797 views)
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Old 26th January 2013, 06:03 PM   #4646
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Now that is gorgeous. Who cares how it sounds
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...Shape the sound , Man!
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Old 26th January 2013, 06:09 PM   #4647
Stixx is offline Stixx  Germany
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Quote:
Who cares how it sounds
I do . Didn't have it on the breadboard for almost 2 years for nothing...
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Old 26th January 2013, 06:16 PM   #4648
Salas is offline Salas  Greece
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Beautiful aesthetics. Are you an artistic or industrial designer of some sort?
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Old 26th January 2013, 06:21 PM   #4649
6L6 is offline 6L6  United States
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Stixx -

Your amp is fantastically beautiful! A sincere congratulations on constructing such a beautiful Headphone Amplifier.

If we had a 'hall of fame' for gorgeous builds, you would be instantly included!
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Old 26th January 2013, 06:32 PM   #4650
Stixx is offline Stixx  Germany
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Quote:
Are you an artistic or industrial designer of some sort?
Err, yes


As a daily job I am... hmm... look for yourself -->

Mercedes-Benz Arocs 2013 Gadgetfreak
(coincidentally found this in greek )


Quote:
A sincere congratulations on constructing...
Thanks 6L6!!
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