Hello Vfet V-fet people!

[Old Big]

What are these (photo) worth?

Thanks Doug

 

[Zen Mod]

I'll give you 1$60C , for each

you're paying shipping

and I'm making you a favor..........

 

[Old Big]

I confused on that currency. Is that a euro?

 

[rayma]

I confused on that currency. Is that a euro?

It's a joke.

 

[Nelson Pass]

I recall the price was about $25+ back when they were available out of Singapore.
People would probably pay twice that now.

 

[Old Big]

Thank you Sir

 

[Old Big]

Thank you Sir!

 

[Soundhappy]

What are these (photo) worth?

Thanks Doug

Looks on the photo the same like my genuine Vfet's from Acronman Singapore

 

[Old Big]

Nice stash!!!

 

[MEPER]

Even an original 3055 in TO-3 is a bit expensive today:
ORIGINAL MOTOROLA 2N3055 BEST QUALITY TO3 POWER AMPLIFIER TRANSISTOR ad1x23 | eBay
I had a DIY integrated amp using these and the 2955 as output device.....many years ago. I remember that "high-end" people did not like 3055.....but the amp did play some nice music!

 

[MEPER]

4 pairs of VFETs on ebay:
4 pairs of 2SK60 + 2SJ18 V-FET transistors, Original Sony Japan NOS !!! | eBay

 

[nigelwright7557]

Even an original 3055 in TO-3 is a bit expensive today:
ORIGINAL MOTOROLA 2N3055 BEST QUALITY TO3 POWER AMPLIFIER TRANSISTOR ad1x23 | eBay
I had a DIY integrated amp using these and the 2955 as output device.....many years ago. I remember that "high-end" people did not like 3055.....but the amp did play some nice music!

A couple of years back I bought in a 1980's Maplin 225WRMS amplifier which was missing output transistors 2N3055 and MJ2955.
So I bought some in and the amp oscillated quite badly.
I had to increase the VAS capacitor to stop the oscillation.
I can only guess the new transistors had higher gain and/or wider bandwidth.
maplinampsold | harrabylad | Flickr

 

[MEPER]

Some (many) years back I built some Quad 405 power amps based on a cloned PCB. It also had some TO-3 housed output transistors (can't remember what it was) but at least one of the amps oscillated and it sounded very bad. At that time I knew an experienced "analog" electrical engineer. He solved the problem by putting a ferrite pearl on the base of the output transistors and everything was perfect. Then I did this on all the output devices just to be sure. I guess the ferrite pearl reduced the bandwidth a bit so phase margin came on the "good side". Apart from that it was a good sounding amp. It remember it had an opamp as input device.

 

[fabrice63]

I recall the price was about $25+ back when they were available out of Singapore.
People would probably pay twice that now.

much much more am afraid

genuine ones are 100 dollars each at least , when you're lucky enough to find them.

which i haven't been lately


.

 

[WBS]

"Genuine" is the key word. I remember posts in one of the VFET threads documenting the disappointment of people ending up with fakes.

 

[Nelson Pass]

genuine ones are 100 dollars each at least , when you're lucky enough to find them..

So 400 x $100 = $40,000.

 

[WBS]

You would probably net more by selling your massive stash of Toshibas at today's prices.

 

[Blk Dynamite]

Oh wow I had no idea. I got a pair of 2SJ28’s and 2SK82’s sitting in the closet. Guess I’ll be stashing these away for awh

 

[vdi_nenna]

I have eight 2Sk82s and 4 pairs of 2SJ28s and 2SK82s.
I'm not a fan of unobtainable parts.