Finally put the Aikido in a proper chassis

cjkpkg · 1st August 2010, 07:49 PM

Well, its been a long time coming and with my adventures in the Pass forum I have decided to put the Aikido in a proper enclosure.

Specs:
Aikido 5687
Output tubes: Either 6CG7 or 6DJ8
Xformer: Edcor XPWR106
PSU: Tubecad PS-3
Chassis: Hifi2000
Alps 100K Pot
NKK switches
Neutrik gold plated RCA's

B+ is running 320V which I may look to lower a bit but plate voltage is within reason although a little high for the 6DJ8's. I may introduce a choke in the PSU to help.

Biggest gripe is that the volume knob should be bigger!!!

DualTriode · 2nd August 2010, 03:51 AM

Hello,
Nice looking and roomy.
You were speaking of a choke to help knock down B+ voltage. My Thoughts, you may need a resistor too. I have used chokes for the Aikido, even more quite.
How is installing the transformer in the same chassis working out for induced hum?
DT
All just for fun!

cjkpkg · 2nd August 2010, 12:11 PM

It used to be all mounted on an aluminum plate with a wood surround - ended up being over 7" tall!

This is a 3U chassis about 4" tall. I mounted the xformer on a stack of neoprene washers about 0.25" thick. It is very hum free.

I still need to clean up some of the wiring for the inputs and outputs but so far so good! This is a terrific preamp - as many have said before.

Sounds great with the F5!

cjkpkg · 13th August 2010, 09:23 PM

Well, I cleaned things up a little and hooked up the power on LED. Other tweaks were adjusting the cathode resistors for the 6DJ8's I'm running. The amp is now VERY VERY quiet and gain is appropriate. Sounds AWESOME with my simpleSE...

Brit01 · 13th August 2010, 10:14 PM

Nice work. Simple and neat.

The copper tubing works well as a shield? Is it grounded at all?

Be careful you don't get any leaks from your fish tank!! That could be a nasty mess.

cjkpkg · 13th August 2010, 11:17 PM

I know...I'm biding my time until I can take over the basement from the girls(3 daughters) and make it my man cave...

Got the idea from someone at diytube. I have a 50' spool of copper hanging around so I figured what the heck! Seems to work good. This thing is totally silent both with a tube power amp and a SSamp. I do get a little more umph from the F5...

I am also building a P-P EL84 amp just for haha's. That is the last type I really do not have for comparison.

I really like the Aikido in a "modern" enclosure. Its got all the show and plenty of go...

1st August 2010, 07:49 PM	#1
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	Finally put the Aikido in a proper chassis Well, its been a long time coming and with my adventures in the Pass forum I have decided to put the Aikido in a proper enclosure. Specs: Aikido 5687 Output tubes: Either 6CG7 or 6DJ8 Xformer: Edcor XPWR106 PSU: Tubecad PS-3 Chassis: Hifi2000 Alps 100K Pot NKK switches Neutrik gold plated RCA's B+ is running 320V which I may look to lower a bit but plate voltage is within reason although a little high for the 6DJ8's. I may introduce a choke in the PSU to help. Biggest gripe is that the volume knob should be bigger!!!

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2nd August 2010, 03:51 AM	#2
DualTriode diyAudio Member Join Date: Aug 2009 Location: Sacramento	Hello, Nice looking and roomy. You were speaking of a choke to help knock down B+ voltage. My Thoughts, you may need a resistor too. I have used chokes for the Aikido, even more quite. How is installing the transformer in the same chassis working out for induced hum? DT All just for fun!

2nd August 2010, 12:11 PM	#3
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	It used to be all mounted on an aluminum plate with a wood surround - ended up being over 7" tall! This is a 3U chassis about 4" tall. I mounted the xformer on a stack of neoprene washers about 0.25" thick. It is very hum free. I still need to clean up some of the wiring for the inputs and outputs but so far so good! This is a terrific preamp - as many have said before. Sounds great with the F5!

13th August 2010, 09:23 PM	#4
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	Well, I cleaned things up a little and hooked up the power on LED. Other tweaks were adjusting the cathode resistors for the 6DJ8's I'm running. The amp is now VERY VERY quiet and gain is appropriate. Sounds AWESOME with my simpleSE...

13th August 2010, 10:14 PM	#5
Brit01 diyAudio Member Join Date: Jul 2008	Nice work. Simple and neat. The copper tubing works well as a shield? Is it grounded at all? Be careful you don't get any leaks from your fish tank!! That could be a nasty mess.

13th August 2010, 11:17 PM	#6
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	I know...I'm biding my time until I can take over the basement from the girls(3 daughters) and make it my man cave... Got the idea from someone at diytube. I have a 50' spool of copper hanging around so I figured what the heck! Seems to work good. This thing is totally silent both with a tube power amp and a SSamp. I do get a little more umph from the F5... I am also building a P-P EL84 amp just for haha's. That is the last type I really do not have for comparison. I really like the Aikido in a "modern" enclosure. Its got all the show and plenty of go...

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