What does your Aikido drive?

[Brit01]

Just interested in what you are using your Aikido for apart from a headphone amp.

Being a total newbie to this hobby I made the mistake of thinking that my Aikido could be used as a preamp for my SS power amp Just a bit too much gain apparently

Now with a bit more knowledge after swatting up on more tutorials I think I will modify it for headphone use and start on a buffer amp for my power amp. Simple Cathode Follower maybe.

Also starting to gather parts for a simple SE maybe with EL34 or EL84's and 6N6P's as the driver.

So what do you use your Aikido for?

[Geek]

Hi,

Originally posted by Brit01
JBeing a total newbie to this hobby I made the mistake of thinking that my Aikido could be used as a preamp for my SS power amp Just a bit too much gain apparently

You just need to use lower mu tubes... 12B4, trioded pentodes, etc.

Originally posted by Brit01
Now with a bit more knowledge after swatting up on more tutorials I think I will modify it for headphone use and start on a buffer amp for my power amp. Simple Cathode Follower maybe.

Also starting to gather parts for a simple SE maybe with EL34 or EL84's and 6N6P's as the driver.

I've used an Aikido on the bench as a line driver, as well as similar circuits for driving trioded sweep tubes in tests. With the right choice of tubes, it can swing a good amount of volts. I'm rather fond of the 5751 when I need gain and the load doesn't drop below 47K.

Cheers!

[Brit01]

You just need to use lower mu tubes... 12B4, trioded pentodes, etc

Thks Gregg. These have a really low mu I see, 6~. I just bought some 6N6P's for the lower mu but they are not comparable.

I'll see if I can find some on ebay.

In the meantime I'm going to try the Aikido as a headphone amp.

[Brit01]

mmm... not so common this one.

I see tubestore has in stock at 7.95 each.

[athos56]

I use mine as a front end of a SE KT-88 amp. I like it.

[Andypairo]

I use it as front end in my hybrid amp, followed by a power diamond buffer.
Steve Dunlap's Krill amp is another option..

Ciao

Andrea

[minhaj]

Aikido is a topology you can use it to drive many things. I use it as a line amp to push 2A3 drive 300B se amp.

You can put 10K ohms high quality R in series to input pin of 10K orms volume pot -that will reduce gain significantly, may prove to be OK for your SS amp.

I built 2nd half of the Aikido as buffer and it gave very good result better than anything I built earlier. You can try that.

Regards

[Brit01]

You can put 10K ohms high quality R in series to input pin of 10K orms volume pot -that will reduce gain significantly, may prove to be OK for your SS amp.

I might just try that. In fact I have an Alps 10K in the post right now. Should arrive in a week or 2.

I'm still looking for input tubes with a low mu. OlleBolle just reminded me the 12B4 is not a twin triode.

I built 2nd half of the Aikido as buffer and it gave very good result better than anything I built earlier. You can try that.

I'm planning to build a buffer using a cathode follower which is what the second half of the Aikido is

[Tweeker]

6080 is a rather low mu twin, probably too low to use in both sections. However as a CF section gain is ~.6 and it can drive very demanding loads.

Another almost heretical thing you can do to reduce gain is apply NFB.

[Brit01]

Another almost heretical thing you can do to reduce gain is apply NFB.

Would these be feasible with JB's board 5687 configuration?