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First One - mosfet amplifier module
First One - mosfet amplifier module
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Old 20th September 2018, 02:37 PM   #4281
nanakos is offline nanakos
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Fake or bad caps....
I bought 8 pieces ELNA FOR AUDIO 10000uf 63v from AUDIOPHONICS to use them in my FO and the measurements showed about 8400 uf.After sales services told me that tolerance is 20% so these caps are OK.But i have never seen in my life before branded product such as ELNA for audio to have such low measurements.They usually have at least 5-10 percent more.I have 7pcs 10 yo ELNA caps and they have 11000uf or more. I am very disappointed and of course I will not use them.Of course they refused my review that's why I'm publishing it here.
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Old 23rd September 2018, 09:53 PM   #4282
Lazy Cat is offline Lazy Cat  Slovenia
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Lightbulb New FO modules to be launched in 2018

FO modules v1.6 in final phase of preparation, schematic locked, measurements done. PCB layout on my LCD screen so it looks we could still manage them to be dated with 2018 mark.

FO module v1.6 is unconditionally stable and has been thoroughly sound tested at each step of development with two slightly different amplifiers, one having previous - another current variant, so always better sample proceeded to the next level. Time consuming process gave amazing result, we think. Stay tuned.

Pic showing 500 kHz square wave signal at 20 Vpp on 8 Ohm load.
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Old 25th September 2018, 02:14 AM   #4283
Erlend Sæterdal is offline Erlend Sæterdal  Denmark
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First One - mosfet amplifier module
Is this a L,M or small Lacy Cat?
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Old 25th September 2018, 08:01 AM   #4284
Lazy Cat is offline Lazy Cat  Slovenia
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All measurements and listening sessions done with large modules. No worries, medium will share same topology only one pair of output mosfets. Experienced tons of amps in our system, all kind of brands and profiles, without any doubt or exaggeration I can say FO will be fearless giant killer.
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Old 26th September 2018, 10:18 AM   #4285
RobSoet is offline RobSoet
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Interested... still have to built my L project but wouldn't mind sizing down... .


Any ideas on price setting for the new modules?
And, LC, somewhere you mentioned you where considering encapsulating the modules in resin... . will you stick to that plan?


And while we're at it... I'd be interested in your experiences with the metrum Pavanne compared to the other dacs your using... .


Cheers,



Rob
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Old 26th September 2018, 05:37 PM   #4286
Erlend Sæterdal is offline Erlend Sæterdal  Denmark
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First One - mosfet amplifier module
Default FO L

Have two slightly modiefied L moduls never mounted. Because to busy and waiting for the new.Picture in the tread. Price 300 Us Dollars. Live in Denmark. I know how to make them stabile.
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Old 27th September 2018, 07:36 AM   #4287
Lazy Cat is offline Lazy Cat  Slovenia
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Quote:
Originally Posted by RobSoet View Post
Interested... still have to built my L project but wouldn't mind sizing down... .
Don't need to, First One L will be produced too.


Quote:
Originally Posted by RobSoet View Post
Any ideas on price setting for the new modules?
Same price range as they were, so prices set in the first post of this theme are valid.


Quote:
Originally Posted by RobSoet View Post
And, LC, somewhere you mentioned you where considering encapsulating the modules in resin... . will you stick to that plan?
Most probably only parts of it, not complete module.


Quote:
Originally Posted by RobSoet View Post
And while we're at it... I'd be interested in your experiences with the metrum Pavanne compared to the other dacs your using... .

Cheers,

Rob
We use Adagio by Metrum, of course slightly modified, in our main system. I like it is true dual mono DAC, L/R channel's GND are isolated. S/N ratio, feed-forward correction and dynamics are state of the art.

Cheers
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Old 27th September 2018, 07:57 AM   #4288
Mark Verhoeven is offline Mark Verhoeven  Netherlands
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You want to share what has been modofied to the Adagio?
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Old 27th September 2018, 10:30 PM   #4289
Lazy Cat is offline Lazy Cat  Slovenia
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Adagio was just slightly adapted to our needs, only little tweaks could be performed since the DAC is properly engineered product. Comparing it to the original one we believe that modification is beneficial to our system.
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Old 30th September 2018, 11:02 PM   #4290
Erlend Sæterdal is offline Erlend Sæterdal  Denmark
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First One - mosfet amplifier module
[ATTACH][/ATTACH]

Now I have to finnish the Large One in stereo version. 2000 W Transformer 2 x 60 Vac
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