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F.S: Sony V-FET 2SJ28/2SK82 pairs

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#6
Here pics of vfets
 

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#8
I checked each vfet as explained at pag 4 of Ta-n88 amp Sony Service Manual.

S-D resistance around 1.1/1.3 Ohm
G-D as diode
S-G as diode

No bias failure. Bias Is present but cannot be adjusted at
+/-78V with switching transistors ok
 
#10
As a matter of interest, I have a 2SJ28 Vfet that measures around 1 ohms on the S-D measurement but is internally flawed when used in the circuit. No bias voltage in my test (and I tested it 3 times) was able to stop it from conducting.

As far as fake VFets - i've heard of eBay sales from China selling perhaps re-badged VFets. ie. possibly the half die version 2SK60 or 2SJ18 being sold as the 2SJ28 / 2SK82. If you dig deep enough in the forum there are such photos depicting this case.

Is there a reason for selling all 12 pairs? Don't like the sound?
 
#14
Did anyone try to buy parts from Francesco?

I contacted Francesco, and we exchanged a few emails. He indicated that all 12 pairs are still available, but he asked a lot more money. Oh well, these parts are hard to find, so I thought I'd still pull the trigger. He agreed to PayPal, but when I asked him for a PayPal invoice that specifies "Sony VFETs, tested and working" he did not respond anymore. All I wanted was to make sure that there is a possibility to return the parts and get a refund in case the parts that don't work as they should. I have have bad luck before, and at this price level I simply don't want to take any risks of losing my money.

I'd really like to take this forward, but it seems that things don't work out in my favor here.
 
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