I have been looking at Akido....Hi Russell,
The alephj is very nice, I preferred it over the F5, but I also preferred the F6 over the Aleph J on my system. The bass is very good on the F6. I'm using a tube pre (Aikido) with it, a very nice combo. I tried several SS Preamps but the Aikido is hard to beat.
Paul
Russellc
The 9 pin all in one is an easy build, and not too expensive to build. I built the 9 pin and after that a no holds barred dual mono because I was so impressed with the sound. The dual mono sounds like the all in one, just a lot more expensive, go with the all in one.
The 9 pin all in one is an easy build, and not too expensive to build. I built the 9 pin and after that a no holds barred dual mono because I was so impressed with the sound. The dual mono sounds like the all in one, just a lot more expensive, go with the all in one.
Do you have a link to the schematic you used? I built and am using this very simple tube pre build and I enjoy it very much but then I like a healthy dose of 2nd harmonic. I did change the design a little for just the 12AU7 tube.
4S Universal Preamplifier for 12A*7 Tubes
It does not get much simpler than this circuit.
Do a search for tubecad and Aikido, should take you to the site, I'm pretty sure that the designer posts schematics on his website.
The 9 pin all in one is an easy build, and not too expensive to build. I built the 9 pin and after that a no holds barred dual mono because I was so impressed with the sound. The dual mono sounds like the all in one, just a lot more expensive, go with the all in one.
Although I have two 9 pin mini twin triode tube preamps on hand, (with phono stages) I not a big fan of them any longer, future builds will be with 8 pin octals. If one is a fan of 12au7, try 6ns7 types
Russellc
Do a search for tubecad and Aikido, should take you to the site, I'm pretty sure that the designer posts schematics on his website.
That is the board I was looking at. If you scroll down, there is an octal version I am interested in.
Russellc
Last edited:
HI I will like have the psu compatibility M2 and Vfet V2 ... a good custom iron with 18v and 22v tap in EU ??
The heck with boards Russellc. Build point to point from the schematic and have some fun.
🙂
My "70 Watts of McIntosh Power" P-P 6550/KT 88 amp is point to point. I much prefer circuit boards for these amps.
Russellc
It would allow you to play with it. That's a real advantage.
😎
Nicoch,
in response to your PM: The arrangement to add a trimpot to the input stage of the M2 looks like the attached.
The snippet is taken from p.2 of the F5Turbo article by Nelson.
Attachments
İ put a piece of Mu metal over the small transformer only, first.
I had still some hum.
It was gone completely, when I shielded the transformer also, this contributed more to silence than the small shielding.
Generg,
how did you actually shield the transformer?
İ put a piece of Mu metal over the small transformer only, first.
I had still some hum.
It was gone completely, when I shielded the transformer also, this contributed more to silence than the small shielding.
Hi Generg,
Can you show a picture on how you shield the transformer? My friend is experiencing hum when the PS board or the rectifiers are close to the amp module/Input transformer. Even if just the rectifiers close to the input transformer will cause hum. No hum if we put all the power supply cap bank, rectifiers and power transformer in another case or away from the amp module. We have also noticed that the rectifiers gets quite hot and vibrates, is that normal ?
Thanks
I noticed a 3db increase on my left channel without the star ground. Im going to try running a separate ground from: supply-board-thermistor-ground and see if that lowers it, I also read that shielding the power transformer is better than shielding the input transformer. Overall my un-shielded M2 is buzzing about 6db louder than the F6 on 115db/w drivers.
On Antek transformers their is a shield wire, where is the best place to connect it?
On Antek transformers their is a shield wire, where is the best place to connect it?
Last edited:
I would "guess" power ground, so that there is something flowing, than it's farest away from the signal. Please correct me anybody if this is nonsense.
You can also try to rotate your trafo and optimize it to the lowest noise.
You can also try to rotate your trafo and optimize it to the lowest noise.
Can you discern whether you experience a 50Hz or 100Hz hum?
I am getting a 50hz.
To make it clear:
You want the shield to be connected to a point which has the biggest distance to your audio signal, and also from the audio ground. And this is the ground/earth from the AC mains, where it gets into your amplifier's case. You can put it to the connection, where you grounded your case (so where the ground/mains connects to your case).
A picture does say more like 1000 words (especially if it's not your mother tongue 😉 )
You want the shield to be connected to a point which has the biggest distance to your audio signal, and also from the audio ground. And this is the ground/earth from the AC mains, where it gets into your amplifier's case. You can put it to the connection, where you grounded your case (so where the ground/mains connects to your case).
A picture does say more like 1000 words (especially if it's not your mother tongue 😉 )
Attachments
Member - @ wdecho has twisted my arm as we have similar speakers and he loves the M2
Have joined & ordered the M2 in group buy scheme from @ teabag
So hopefully in a couple of months I will have the parts delivered and have the M2 amp built
I'm just looking at a self assembly chassis using Conrad heatsinks - Conrad Heatsinks - Products
I could do some nice work with the MF20 double flange heatsinks
You have to start planing early ( so they say )
FR
Have joined & ordered the M2 in group buy scheme from @ teabag
So hopefully in a couple of months I will have the parts delivered and have the M2 amp built
I'm just looking at a self assembly chassis using Conrad heatsinks - Conrad Heatsinks - Products
I could do some nice work with the MF20 double flange heatsinks
You have to start planing early ( so they say )
FR
- Home
- Amplifiers
- Pass Labs
- Official M2 schematic