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Old 27th June 2013, 11:01 AM   #5261
dady is offline dady  Argentina
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Looks a burger machine with vacuum tubes!
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Old 27th June 2013, 01:59 PM   #5262
pebmrb is offline pebmrb  United States
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Quote:
Originally Posted by dowdylama View Post
pebmrb:
Great job!
Can you provide circuitry details?
Jim
Inside is a modified Sony Playstation 1,first version.Dac is direct coupled via a RF filter network to a 12b4 gain stage which provides the small amount of gain to get this to normal CDP output levels.12B4 power supply is external.PS1 power supply has been replaced with a linear PS.It is a bit tempermental reading some CDs even after making adjustments,so some more work is required here.This is an excellent sounding CD player.Very analog and natural,as close to vinyl as any CDP I have heard.
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Old 27th June 2013, 02:08 PM   #5263
pebmrb is offline pebmrb  United States
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Originally Posted by HiGHFLYiN9s View Post
Very nice work pebmrb! I would love to see close ups of the other two pieces of equipment on that rack.
The Eyepod:
An EL84 amp
Attached Images
File Type: jpg Eyepod650.jpg (138.6 KB, 1053 views)
File Type: jpg eyepod650-1a.jpg (10.8 KB, 1018 views)

Last edited by pebmrb; 27th June 2013 at 02:11 PM.
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Old 27th June 2013, 02:17 PM   #5264
pebmrb is offline pebmrb  United States
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Also on the rack is a matching phono stage,I don't currently have pics of that.The rack itself is an interesting piece.It's a old cast iron sewing machine stand from the late 1800s which someone had put in the trash.A couple shelves added creates a nice,steampunk stereo stand.
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Old 30th June 2013, 08:58 PM   #5265
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Originally Posted by dady View Post
I agree with diodes. The 81 further is not an audio valve probably better to control it. About 82 Different animal. To Popilin friend is a nice tube. SN7 is better- Did you tried 5751? ECC808?

Best Regards for you.
Thanks for the comments guys. I stuck with the original Mullard valve set ie ecc83 and two el84. As for the HT diodes, I went back to the silicon bridge and just used half of the bridge instead of two 1N4007's and the sound is better.
Latest pic with full covers. The amp sounds nice for guitar sounds and for my rock and roll moods.
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Old 2nd July 2013, 04:16 AM   #5266
eboz is offline eboz  United States
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Default New (more artistic) pics of my 4-65a amps

Some were taken in HDR and some with a Lensbaby and speed adapter.

Original post back from last year when the amp was first completed.
Photo Gallery

One change is that it's gone from a d3a as input tube to a e280f. This input tube has about 3.2v bias from two AA batteries. It avoids problems I had with running the d3a into A2, and I think sound a bit better as well.

-MW
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File Type: jpg 9188321780_1d8e3f02d4_b.jpg (313.2 KB, 1497 views)
File Type: jpg 9188240572_c3a74d0f75_b.jpg (111.0 KB, 1359 views)
File Type: jpg 9171587432_ecac1e9505_h.jpg (741.8 KB, 1317 views)
File Type: jpg 9171588906_ae1681821e_b.jpg (220.5 KB, 1216 views)
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Old 2nd July 2013, 04:23 AM   #5267
dady is offline dady  Argentina
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Quote:
Originally Posted by eboz View Post
Some were taken in HDR and some with a Lensbaby and speed adapter.

Original post back from last year when the amp was first completed.
Photo Gallery

One change is that it's gone from a d3a as input tube to a e280f. This input tube has about 3.2v bias from two AA batteries. It avoids problems I had with running the d3a into A2, and I think sound a bit better as well.

-MW
Is Frankenstein, the monster is behind the 4-65A-
I will imitate your style sir is the better I saw in this topic.
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Old 2nd July 2013, 11:44 AM   #5268
tim614 is offline tim614  United States
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Originally Posted by eboz View Post
It took me over two years in planning and construction, but they're finally completed! It was as much an exercise in aesthetics, as it was for sound quality. That is to say, they sound at least as good as they look!

-MW
This is what seperate men from boys!
Great job! Very Inspirational!
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Old 2nd July 2013, 06:36 PM   #5269
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@ eboz very cool design!

some pictures of my 6N13S headphone amp, from prototype to final build:
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File Type: jpg 1.jpg (785.5 KB, 583 views)
File Type: jpg 2.jpg (414.9 KB, 503 views)
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Old 2nd July 2013, 07:20 PM   #5270
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Wachtfels666: Very nice! How did you do the lettering on the top panel?
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