• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Sony TA-N7

MX117.MC7150 said:
VFET amps are rare & different. You would be well served to follow 'rottalpha' advice and send to a "known good" VFET amp specialist. The TA-N7 is worthy of the extra cost to ship across the channel to have properly & safely restored.

As has been stated.......... do the SDT on your VFETs before making any decision. And, confirm with your seller they know how to pack properly before your next purchase.
Click to expand...
there are custom duties to pay, 20% each way, plus handling fees?
 
The guy I recommended makes, and markets his own amps, and phonostages that are based on his own designs, as well as vintage repairs, given his experience, it's probably not the first v-fet he's worked on.
 
AudioAvarice said:
The guy I recommended makes, and markets his own amps, and phonostages that are based on his own designs, as well as vintage repairs, given his experience, it's probably not the first v-fet he's worked on.
Click to expand...
oh boy...if this was only the first time I hear of the technician with 40 years of experience who must know something about vfets....

Read through this thread. Take it form the beginning, it is a good read.

Wanted: Tech to Service Yamaha C-1 & B-2 gear in Sun Valley, Idaho

I'm new to AK, searching for service providers that work with Yamaha C-1 and B-2 gear. I'm located in Sun Valley, Idaho. Cheers Rick
audiokarma.org
 
VFETs passed the diode test. However, while removing the BJT I demaged the PCB, see attached picture. I think it could be already demaged since it is near the bottom panel where the amp took the biggest hit. I think I could fix it but I searched if I could find another PCB and it seems it is even rearer then the VFETs?
 

Attachments

  • IMG_4849.jpg
    IMG_4849.jpg
    114.8 KB · Views: 23
why did you need to remove the BJTs?
Yes that board could be repaired or replaced with a new PCB. Yes, they exist.
 
I read in many places that they work near the limit and they should be substituted with D44H11 and D45H11. I would like to do a full restoration. Where can I find the PCB? I searched but I did not find anything, at least with the part number I could not find anything.
 
You must log in or register to reply here.
Back
Top Bottom