Its alive!!! Aikido 5687 - diyAudio
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Old 12th August 2009, 04:41 AM   #1
cjkpkg is offline cjkpkg  United States
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Default Its alive!!! Aikido 5687

Well, its been about 8 months in the making but my Aikido 5687 is finally making noise tonight!!!

Its a 5687 board with 6CG7...Edcor XPWR106 Rat Shack 12.6V filament xformer, Triad C-14X choke and Bas' PSU board.

This will be feeding my Tubelab SimpleSE. I must say that the system is really quiet...I have been lucky with no hum. I am running '80s vintage Polk bookshelves M4.5 and it sounds really nice.

Pics will follow shortly...
Carl
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Old 12th August 2009, 04:17 PM   #2
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Are you using AC or DC for the 5687 heaters? Just wondering...
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Old 12th August 2009, 04:43 PM   #3
cjkpkg is offline cjkpkg  United States
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The heaters run on A/C and what little I heard - no noise...

I have taken all the standard precautions...twisted pairs etc... and used shielded wire for the inputs/outputs except in a couple short run areas.

I have a SS rectifier and the other parts to convert it to D/C if necessary....
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Old 12th August 2009, 10:50 PM   #4
cjkpkg is offline cjkpkg  United States
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Here are some pics...been listening to it for the last couple hours...really sounds great.

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Old 13th August 2009, 12:06 AM   #5
Brit01 is offline Brit01  United Kingdom
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That looks familiar. Good work. I've got Bas's psu and the Aikido also.

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Old 20th August 2009, 06:34 AM   #6
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Quote:
That looks familiar. Good work. I've got Bas's psu and the Aikido also.
And how does your Aikido sound? Are you happy with it?
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Old 20th August 2009, 07:31 AM   #7
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Very nice! Don't forget to peel off the blue stuff
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Old 20th August 2009, 12:20 PM   #8
Brit01 is offline Brit01  United Kingdom
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Quote:
And how does your Aikido sound? Are you happy with it?
Very happy indeed. Have it with 5687 input and 6N6P output. Alps 27 10K pot with 20K resistor in series.

Currently working on various other projects so it's been put aside for the moment. (using the iron from it).

But planning to put it in a nice chassis very soon.
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Old 20th August 2009, 06:16 PM   #9
cjkpkg is offline cjkpkg  United States
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Yes, the sound from the 5687/6CG4 Aikido is very nice. There is absolutely no noticeable hum at all. I have probably 30-40 hours listening time on it by now and I am very happy. The gain seems appropriate and I am using an el cheapo Alpha 100K audio taper pot.

I will be taking the top plate off soon and finishing the wood soon with a stain and poly - I will also remove the blue film and tidy up some of the wiring when I reassemble it.
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Old 20th August 2009, 06:24 PM   #10
Brit01 is offline Brit01  United Kingdom
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Quote:
el cheapo Alpha 100K audio taper pot.
I've noticed you can make a big improvement with a nice pot.

I put in cheap 2 USD pot in a 5687 buffer I have and it sucked all the life out of it.
All my hard work thrown away.

Just ordered a few model 27 Alps 100K. 11 USD from Mouser.
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