DIY Sony VFET pt 1

[Nelson Pass]

Nominal 12Ω average would not be ideal for an amplifier that it seems is happiest at 8Ω. Vut i suspect that won’t be the big issue.

Nothing that a 22 ohm resistor in parallel wouldn't fix nicely...

 

[juanitox]

Nominal 12Ω average would not be ideal for an amplifier that it seems is happiest at 8Ω. Vut i suspect that won’t be the big issue.

Nothing that a 22 ohm resistor in parallel wouldn't fix nicely..

is it the same for the M2 as with the VFET1 ? ( i have a 16ohm Altec woofer )

 

[coolnose]

As i understood the rules, one does not have the choice to choose so if you forgo your P-Channel i do not believe any of your entries will have survived to Round 2.

dave

Actually it does if I am not mistaken... in the end it's a game of odds depending on the number of your "tickets" that would push you to "reject" the first winning draw and enter the second one for the N-channel ...

That said, if NP decided both were good to go, I don't care!

EDIT: My "P" is kit paid for anyway, so consider this some OCD driven thing... for the sake of it

 

[Variac]

I can’t find exactly what MeanWell supply is spec’ced ?
I assume it’s a brick like we have for the ACA but higher voltage It would be good to know also if there’s an equivalent of the SMPS type with the perforated cover with equivalent specs for those who might want to put it in a chassis.

 

[Rush]

I found these.

I think they will work for internal use.

At mouser.com Mean Well LRS200-36

Only $28.34 each

36V 5.9 Amps.

Rush

 

[coolnose]

AFAIK the exaxt type of the SMPS was not disclosed, but should be easy to track down. Will see soon anyway...

 

[jostwid]

SMPS

First amp i fed with an SMPS was F2. Absolutely no problem. But it was and still is one the most quiet amps.
Maybe V-Fet is in the same league.
Mofo no problem at all.
The challenge for me today is to get it right with something like L'amp!

 

[oreo382]

AFAIK the exaxt type of the SMPS was not disclosed, but should be easy to track down. Will see soon anyway...

I think its an internal ps.Looking at the back panel of the chassis all I see is a line cord plugin, not that goofy round brick power supply connector. I think the internal one mentioned here (200W) may be the one.

 

[coolnose]

Was wondering, but not as sure as you are... the chassis is small...

 

[oreo382]

On second thought I looked at the picture again and can't say for sure that the connector is a line cord type.It may very well be the round type of one of those laptop supplies,however looking at the prices of those compared to the internal ones there is quite a difference,the internal is much cheaper.However i'm sure Nelson gets a discount .Anyway I could drive myself nuts mulling it over so I may as well wait until someone that actually knows pipes up or we get ours and see for ourselves.

 

[coolnose]

I have never seen a picture of an "outside" smps.. so you might be right.. anyhow, we'll see

 

[oreo382]

The "outside" ones are just Laptop bricks,like you have powering a laptop computer.

 

[Variac]

I strongly suspect they are the external brick type as we’ve had a lot of luck with the ACA that way. I could ask Jason, but don’t want to be a PITA. The connector looks too small to be AC. Also it’s kind of a feature of very expensive amps to have a remote PSU and with a brick we get that on the cheap.

But it would be fun to see what ‘open Frame’ PSU’s have the same specs or possibly better

 

[planet10]

Is not chord coming out the connection to the external supply?

dave

 

[anome]

See pics in https://www.diyaudio.com/forums/pass-labs/370282-diy-sony-vfet-pt-1-a-3.html#post6596721

 

[PKI]

Ok as we talk PSU.

Would just regular latest known interaction of FW psu with separated voltage per channel be an upgrade over included MeanWell? First I have many of those and second, I would not be a DIYer if I have not started upgrading stuff before even building it

I can even do something like Salas Ubib for the FE

 

[6L6]

The PSU is the Mean Well GST160A36

There is a CLC filter in the amplifier.

It is the quietest amplifier I have ever heard. Changing it would almost certainly bring a decrease in performance.

 

[Mark Johnson]

Here is the SMPS that I am using. It is an EXCELLENT performer.



_

 

[PKI]

The PSU is the Mean Well GST160A36

There is a CLC filter in the amplifier.

It is the quietest amplifier I have ever heard. Changing it would almost certainly bring a decrease in performance.

Thank Jim, but you are missing the point lol

 

[Zen Mod]

.....
It is the quietest amplifier I have ever heard. .......

completely logical, with those wimpy Sony VFets