Big V-FET thread
- Thread starter Wire Nut
- Start date
GuyNoir
Hallowed State
Nor have I heard a 2a3. I've heard an EL84 SEP and a Soviet 6P1T based push-pull (6AQ5 equiv) and eared them both favorably.
I see in another thread that you just bought a 4650 and are in the process of refurbing. I have a 4650 incoming that has had the diodes-of-death issue addressed and has been freshly biased. I'll be looking at recapping this coming summer when AKer Blahgstrom is back in town (are you listening Blaine!?
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When you've got it done, it might be helpful if you posted a parts list or scanned your invoice(s) from the parts outlet. I know I'd certainly appreciate it! This has really been an invaluable thread.
I see in another thread that you just bought a 4650 and are in the process of refurbing. I have a 4650 incoming that has had the diodes-of-death issue addressed and has been freshly biased. I'll be looking at recapping this coming summer when AKer Blahgstrom is back in town (are you listening Blaine!?
)When you've got it done, it might be helpful if you posted a parts list or scanned your invoice(s) from the parts outlet. I know I'd certainly appreciate it! This has really been an invaluable thread.
Wire Nut
Active Member
Guys, my Hakko 951 died on me... and while I wait for my replacement I was getting some of the wires ready. I Dremeled out the connection for the output wires and to my amazement the stock power wire is a whopping big 22AWG. That is fine for interconnects, but tiny for power output.
I also got my filter caps and they are the same height as the old ones- which is good. The pins fit right into the old holes so I will just solder them in place.
I will post pix when I get to that point.
Wish I was not so generous to friends- I gave my second Hakko to a friend that was using a cheap soldering iron!!! now I just have to wait... but I did buy two again.
This 4650 is shaping up to be a nice amp when it is done!
I also got my filter caps and they are the same height as the old ones- which is good. The pins fit right into the old holes so I will just solder them in place.
I will post pix when I get to that point.
Wish I was not so generous to friends- I gave my second Hakko to a friend that was using a cheap soldering iron!!! now I just have to wait... but I did buy two again.
This 4650 is shaping up to be a nice amp when it is done!
Berre
Member
I learned to remember diode polarity like this: the stripe on both the symbol and the actual part resembles a "minus", which indicates the negative (-) side of the diode (=cathode)
Zombie
Active Member
I had a 5550 that I recapped and so on. It sounded very sweet compared to my Quad 909, but I eventually dumped the 5550 because of its very weak bass response. Hopefully I will get my hands on one of the more powerful models in the future...
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GuyNoir
Hallowed State
Since my last post, I've taken possession of a 4650. It will need a recap, but so far, I am favorably impressed. The lean bass output somewhat tempers the fat low end of my ADS speakers. Gotta love synergy. Of course, I too will be on the lookout for something more powerful in the vFet line, but only if occasion should present itself.
cgutz
AK Member
Love my 4650, has been in continuous use since I got it in 1980. It does seem to favor some speakers over others, but I'm guessing synergy is an issue for most amps and soeakers.
GuyNoir
Hallowed State
Is it the pinch/squeeze connector?
Wire Nut
Active Member
I got my soldering stations and am up and running again. I soldered in the big caps and the new wires that will go to the speaker terminals (I ordered new 5 way terminals that I will install once they arrive).
I will not be able to use the cool lock down that the old caps used as the new Nichicon's are skinny in comparison- but the contacts fit in through where the old ones screwed in & I soldered them in place.
I will not be able to use the cool lock down that the old caps used as the new Nichicon's are skinny in comparison- but the contacts fit in through where the old ones screwed in & I soldered them in place.
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Vinylcafe
Linvin' the Dream
How will you support that board?
Was it sitting on achored caps that were much larger?
I don't have that unit, but the Sony TAE 8450 power supply board is very similar.
Wire Nut
Active Member
I tried to change the name of the thread since I started it... but it didn't work.
I think it is still a good name as Sony sold V-FET gear over 100 to 1 over the competition. Yamaha and others were scrambling to try to make VFET's when Sony was making them in droves. They even have an ad about it.
I think it is still a good name as Sony sold V-FET gear over 100 to 1 over the competition. Yamaha and others were scrambling to try to make VFET's when Sony was making them in droves. They even have an ad about it.
Wire Nut
Active Member
This is what I did for the board that goes on top of the filter caps. First- the caps are the same height as the securing ground post and the old caps- that makes it easy. I cut a piece of solid hickory to size, painted it black to look perdy and silicone glued it in place (circled in photo). There was a large solder spot on the underside of the board so I Dremeled a divot for it to go. Once I get the new speaker posts in... I will use black silicone glue to put every thing in place. There are a few nice things about silicone glue are that it dampes and it is easy to remove.
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Jon S
Super Member
No... It's a design that was only on the TA8650 and TA8550 amps. You stick a 1.5" bare lead into a hole and a lever clamps a metal bar down on the bare wire. I have always thought about removing the connectors and replacing them with banana types.
GuyNoir
Hallowed State
That's what I did on my TAN-8550, using a scrap of plexiglass as a mounting plate and these binding posts (they also come in red)
http://www.mouser.com/ProductDetail/Pomona/3770-0/?qs=/ha2pyFaduivCO3Ht1C0RXpn7s81Z1DfQ0A2y89vgME=