Sony VFET Amplifier Part 2

[Zen Mod]

I can bet that you guys in US of A can find surplus GE motor runs

do I need to open your eyes ........

name of the game is quality ........ for cheap

then satisfaction is ...... square law-ed

 

[flocchini]

I can bet that you guys in US of A can find surplus GE motor runs

do I need to open your eyes ........

name of the game is quality ........ for cheap

then satisfaction is ...... square law-ed

 

[generg]

Isn't the sparkle that such a cap produces in the amp to big.......

 

[Zen Mod]

find me on-line German surplus site , I'll give you 20 tips ..........

moi , Master Scavenger*

*dumpster diver , cheapskate professional

 

[Dennis Hui]

Speaking of motor start caps, would something like this be suitable?

https://www.westfloridacomponents.c...art+Capacitor++Philips+3535B4A0043A250A5.html

About the oil filled ones. I remember seeing some locally at a surplus store but
they are probably of ancient vintage. How long would these last in storage?

Thanks,
Dennis

 

[Zen Mod]

motor run , not motor start

even ancient ones are most probably ok

 

[Dennis Hui]

motor run , not motor start

even ancient ones are most probably ok

Ah...thanks.

Dennis

 

[CeeVee]

Me....'cause i like speed ....i used Ducati motor runs

..for those who don't know that is how the company started...not making great motorbikes !


link

Very cheap here at link 2

 

[flocchini]

Me....'cause i like speed ....i used Ducati motor runs

..for those who don't know that is how the company started...not making great motorbikes !


link

Very cheap here at link 2

 

[Antoinel]

Speaking of motor start caps, would something like this be suitable?

https://www.westfloridacomponents.c...art+Capacitor++Philips+3535B4A0043A250A5.html

About the oil filled ones. I remember seeing some locally at a surplus store but
they are probably of ancient vintage. How long would these last in storage?

Thanks,
Dennis

Hello Dennis. The tech sheet of the caps you indicated has an unusual description which reads "the Al electrodes are separated with paper impregnated with a conductive electrolyte" which to me is a typo error. Beware of ancient oil caps which may contain toxic Poly Chlorinated Biphenyl [PCB] fluids. These oils are electrically non-conductive but are highly polarized; suitable for making caps .

NB. I recall seeing the terrible ill effect of PCB poisoning on the face of a certain Prime Minister in the news a while ago. Puffy, lumpy and distorted; contra to his handsome smooth looks prior.

 

[Dennis Hui]

Hello Dennis. The tech sheet of the caps you indicated has an unusual description which reads "the Al electrodes are separated with paper impregnated with a conductive electrolyte" which to me is a typo error. Beware of ancient oil caps which may contain toxic Poly Chlorinated Biphenyl [PCB] fluids. These oils are electrically non-conductive but are highly polarized; suitable for making caps .

NB. I recall seeing the terrible ill effect of PCB poisoning on the face of a certain Prime Minister in the news a while ago. Puffy, lumpy and distorted; contra to his handsome smooth looks prior.

Thanks for the reminder on old oil caps; I remember looking seeing
"no PCB" printed on the cap so I guess they weren't so old for PCB to
have been used in them.

The Ducati ones CeeVee mentioned looked pretty spiffy.

Cheers,
Dennis

 

[dantwomey]

Isn't the sparkle that such a cap produces in the amp to big.......

And what are the 'audible' benefits of these caps?

Regards,
Dan

 

[WalterW]

Not much going on.... so:

 

[Soundhappy]

Not much going on.... so:

 

[Antoinel]

Hello soundhappy and WalterW. Please guide me to the thread/post which has the specs sheet for 2SJ28. Thanks

 

[Soundhappy]

Hello soundhappy and WalterW. Please guide me to the thread/post which has the specs sheet for 2SJ28. Thanks

Hi Antoinel

Not many spec for 2SJ28

http://www.diyaudio.com/forums/pass...2sk82-e-rank-2sj28-f-rank-13.html#post3859010

Greetings

 

[Antoinel]

Hi Antoinel

Not many spec for 2SJ28

http://www.diyaudio.com/forums/pass...2sk82-e-rank-2sj28-f-rank-13.html#post3859010

Greetings

Thank you soundhappy. Also of interest are the Absolute Maximum Vds and power dissipation.

 

[Soundhappy]

Thank you soundhappy. Also of interest are the Absolute Maximum Vds and power dissipation.

Hi Antoinel
Not original data sheet from Sony
power dissipation is around 100 watts.
One of the ways is try ask Mr Rothacher
at How To Contact Me | Audiohobby.com
first hand vfet data from laboratory bench
of diyers friendly famous oncle Mike garantie.

Kind regards

 

[Soundhappy]

Not much going on.... so:

Things is going on Burning Amp Festival 2015 start 17 october
bring us circuits diy news and discoverings.
Papa speak , vfet DiyAudio kit pcb's and more in perspective.
19 days to wait and Tada !

 

[2 picoDumbs]

One day I am going to get my **** along to this event