Moskido - Hybrid Aikido/MOSFET amplifier

[cjkpkg]

In the stable currently is:
-Moskido
-Tubelab SimpleSE
-Pass Aleph mini
-Pass F5
-DIY EL84 PP 6n1p front end
-TA2022 Tripath
-LM3886 chipamp.com

I like them all - although I will say that the TA2022 is my least favorite. Most recently the Pass F5 and the EL84PP have been my favorites as far as warmth and power. The Moskido seems "faster" even compared with the F5 but that is not a bad attribute.

I think the Moskido will stay as the primary for a while.

[cjkpkg]

Also, I should mention that I have the Moskido hooked up to my Aikido pre. The Aikido is a 6CG7 input and 5687 output setup. The gain is about 10 with the 6CG7's - and is ample.

I would like to experiment with maybe some 6H30's in the input section there or try a set of 6SN7's at the input of the Moskido.

[cjkpkg]

***Report***
I was getting a single pop from one channel upon startup of the Moskido - after about 10 seconds or so. I narrowed it down to one of the 6sn7 tubes - new issues tung sol. Today I received 2 RCA vintage NOS 6sn7's and have been listening to them all afternoon.

I repeated the turn on test a couple times and no more pops. For some reason the bass seems a little better now. Not that it was lacking before or anything.

Of course now I need to scour ebay for a nice pair of vintage 6sl7's...

[Her_lennon]

Hello guys,

I finished my moskido, it sound quite without signal, but whit signal get a lot of distortion on the speaker. Good power but sound like a big saturation at the input. I have bypassed de pre amp and inyected the signal directly to the gate of mos and there are the same distotion. Some idea about that? Thanks!

[geek_83]

HI all, i was looking for good hybrid amp and I found this topic.
Do you thing that this amp is worth of building ?? I think about DC Coupled Moskido, is this problematic to run ?

[cjkpkg]

I went with the original schematic from the Tubecad Journal except that I went for a 10 Zener string(2X5) to up the bias of the MOSFETs. With my PSU I needed 5 to achieve the 1.1A called out. I needed to keep the V+ to less than 50V for the parts I had on hand...

This seemed to be a much less complicated build and I am VERY happy with the results.

Those that have tackled the DC Coupled version have also been very happy with the improvements it adds.

[pgtakaka]

I have finished building the DC version ( Beau's ) .

The bias boards are easily built on a 2 * 2 board.. the Mosfets have
negative temp coefficient - no thermal probs at all . Manages itself.

It is simple to setup . Adjust once and leave it .

The sound is astounding . Until I heard this amp , I did not realise I was missing half the music .

But DO take the heatsink advice from Beau seriously . I can only run a pair of Buz900's per channel at 1.5 amps .. but even in a big room is unreasonably LOUD and he tells me even the two fet version can run 3 amp idle current for a more 'solid' sound, as long as you have the heatsink area right.

Good luck . It is well worth the mission ..

PG

[stfalcon]

Hi guys! I´m new guy here, even I already red many themes in this forum. Now I gonna start to build up a Moskido, a push - pull version with noval tubes. You will be informed about details. By!

[john29302]

uh...typically what is the actual gate voltage of the outputs when 1.2 amps per device is achieved? i was planning to use adj lm317 and that neg adj that is same as lm317 but is neg........do you think the adj regs would be stable enuff?

[beau2317]

This is a test - I don't seem to get notifications and I am checking this out.