YAMAHA B-2 VFETS

[rottalpha]

My friend, I need your help to continue the B-2 recovery. I saw on another topic that it is recommended to replace the rectifiers with FAIRCHILD ISL9R3060G2. I need your experience to confirm if the exchange is recommended and give an opinion on what other parties to exchange. Thank you

is your amplifier working otherwise?

 

[Leonardo G]

is your amplifier working otherwise?

It is in the process of recovery.
I already bought all the electrolytic capacitors, including the 4 of the source, and found a supplier for the vfets. I'm waiting for them to arrive.
But as it is very difficult to find the parts for the B-2 I prefer ordering them on mouser.com
If you have any tips for me I would be very grateful.

 

[clinic-audio]

OK
And how will you know if they are good ?
Matched ?
Are you able to test them ?
Any curves tracer available ?
You bought V FET without to know how they are ?
I hope for you that they are not too expensive .......

 

[Leonardo G]

OK
And how will you know if they are good ?
Matched ?
Are you able to test them ?
Any curves tracer available ?
You bought V FET without to know how they are ?
I hope for you that they are not too expensive .......

Hello Clinic. I'm buying from an Aussie technician.
Like you, he worked at yamaha and also at sony and has a lot of experience with B-2 and B-1.
The price is really not cheap however he will already send me the vfets matched.
As I know you are very busy, and it would probably take you 6 months to give me an answer of how many transistors could sell me and at what price, I continued the search for vfets and found some in italy and those in australia.
The Australian seller was more available and willing to give me some advice on upgrades and parts that should be replaced.
Anyway, I count on your help, and the other AK members, to direct me on this journey.
Leonardo