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Old 17th September 2018, 09:39 AM   #8451
vuohi is offline vuohi  Finland
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Finally got the PIO caps in the mail, so here's a shot of the guts of the Aikido.
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Old 17th September 2018, 11:07 AM   #8452
MagicBus is offline MagicBus  Greece
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Vuohi, your work is very inspirational! Could you share details about the materials you used for the chassis? Especially this leather alike finish and the rings at the base of the tubes.
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Old 17th September 2018, 12:08 PM   #8453
vuohi is offline vuohi  Finland
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Many thanks,

Sure I can share some details about the build.

The case is made of 1.5mm aluminium sheet and bent on a small sheet metal brake. Technically you could do it using a bench vise and some angle iron as the sheet is pretty easy to bend. The rounded front was done in true ghetto style by bending it by hand over a CO2 cylinder about the size of a large fire extinquisher. The sides of the transformer shield are made of the same stuff but painted black.
The PCB is mounted on a separate sheet because I wanted to follow my obsession with no visible screws. The sheet is screwed to the wooden sides of the box. Since the PCB sits pretty deep in the box, I used some noval socket savers to get the tubes higher up out of the enclosure. Not necessary, but looks nicer.

The faux leather is just self-adhesive vinyl. Several brands are available. It's rated for 75°C and the hottest spot on the case gets to about 40°C after several hours so no problems there. I made the rings out of a solid aluminium bar which I turned on my lathe. They're press fit and glued to the case. The pilot light is pretty much in its original shape. It's a 12V vintage piece meant for automotive dashboard use and I just liked the way it looked, so I polished the lens and cleaned the aluminium ring on the lathe and decided make similar rings for all the other front panel attachments. The headphone socket is a modified Neutrik NYS221 stereo jack. I turned the front flanges off and press fit the aluminium ring on it.

It would be a bit of a stretch to call this a junk box build, but it's not far from it either. All the metal came from the scrapyard for 10€ and I have enough left to make at least one more amplifier box. The enclosure materials cost me roughly 10€ total. Well, 10€ and a lot of hours.

The transformers were sourced from discarded equipment. The main transformer was made in Switzerland and the smaller one was made in Finland. Only the Hammond (made in Canada) choke is almost new. I've had it for a long time and I've used it in some test builds but now it found a home in this amp.
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Old 17th September 2018, 12:52 PM   #8454
Professor is offline Professor  Russian Federation
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Originally Posted by qiuchun63 View Post
The inside picture
An elegant solution for mounting capacitors!
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Old 17th September 2018, 02:59 PM   #8455
MagicBus is offline MagicBus  Greece
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Quote:
Originally Posted by vuohi View Post
...
It would be a bit of a stretch to call this a junk box build, but it's not far from it either. All the metal came from the scrapyard for 10€ and I have enough left to make at least one more amplifier box. The enclosure materials cost me roughly 10€ total. Well, 10€ and a lot of hours.
...

Thank you! Just my philosophy. Very nice!
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Old 20th September 2018, 12:47 PM   #8456
ForsbackaKalle is offline ForsbackaKalle  Sweden
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Default ECC88 Headphone Amp

Tube headphone amp with som ECC88 tubes and Edcor xsm10K/150. Works great with setparate boxes and with my Rega DAC. Driving Sennheiser HD600
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Old 21st September 2018, 02:53 PM   #8457
hpeter is offline hpeter  Slovakia
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Originally Posted by mkane77g View Post
TSE - EML 45

i am thinking bout buying myself xmas present - 2a3 meshes. you satisfied with this 45īs ?
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Old 21st September 2018, 07:59 PM   #8458
Lingwendil is offline Lingwendil  United States
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Originally Posted by ForsbackaKalle View Post
Tube headphone amp with som ECC88 tubes and Edcor xsm10K/150. Works great with setparate boxes and with my Rega DAC. Driving Sennheiser HD600
I like it. Very community-college electronics-lab looking! Fond memories of gear that simple!
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