Thanks, I cleaned it top to bottom after buying it former AK'er Yamaha B-2. Then it was refurbished by EchoWars, including replacing the 4 large filter caps.
It's a very fine sounding amp.
B2
- Thread starter brinsmead
- Start date
It's a very fine sounding amp.
How much ya wanna bet?
And how does it look? :scratch2:
brinsmead
Active Member
Vintage you pointed me in the right direction with the choice of LEDs
Thankyou, Slightly yellow colour, absolutely great ! your help saved a lot of try and see.
In relation to the 2SK43 FET in the B2 input stage, Japanese techs that are restoring B2’s, haven’t mentioned that these were impossible to get, in fact they are fitting new 2SK43’s to the drive boards in complete rebuilds.
Sony was the biggest manufacturer of these, so I wouldn’t be surprised if that what turns up in the order
I’ve had a very good record with parts from HB electronics in the States.
I have purchased over the years Nakamichi ,Sony,Yamaha, and other semiconductors that have been unavailable, or limited supply.
Please study this pic and tell me what you think ?
Are these 2SJ26A and 2SK76A exactly the same case size ?
Thankyou, Slightly yellow colour, absolutely great ! your help saved a lot of try and see.
In relation to the 2SK43 FET in the B2 input stage, Japanese techs that are restoring B2’s, haven’t mentioned that these were impossible to get, in fact they are fitting new 2SK43’s to the drive boards in complete rebuilds.
Sony was the biggest manufacturer of these, so I wouldn’t be surprised if that what turns up in the order
I’ve had a very good record with parts from HB electronics in the States.
I have purchased over the years Nakamichi ,Sony,Yamaha, and other semiconductors that have been unavailable, or limited supply.
Please study this pic and tell me what you think ?
Are these 2SJ26A and 2SK76A exactly the same case size ?
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Interestingly enough I have a B-2 with a no mica blue heat sink, a B-2 with a no mica black heat sink, and a B-2 with a mica and black heat sink. The blue and the black have non A V-FET's and the black with micas are the A parts. All have been reconditioned to spec and to my ears sound superbly identical.
Before and after V-FET reconditioning pix of B-2 #2 blue non A V-FET's which I got on the cheap as a spares unit because of shipping damage to the original buyer who was afraid to power it on and no longer wanted it. After an insurance adjustment the seller re-listed it as a parts unit at 10% of the original selling price. As it turned out there was no damage to the electronics only some minor chassis bendage that I was able to straighten out ... mostly.
:tresbon:
Attachments
samosui
Well-Known Member
Parts unit
Vint Age, a parts unit for 10% of the original asking price ?!! Now I call that a score :yes:
In the past, I've bought a second unit (AU-919, for example) in case I needed the unoptainium output transistors. But that was at full price although it is also playable and in great shape.
But 10% ? Thumbs up fellow :thmbsp:
Happy listening,
John
Vint Age, a parts unit for 10% of the original asking price ?!! Now I call that a score :yes:
In the past, I've bought a second unit (AU-919, for example) in case I needed the unoptainium output transistors. But that was at full price although it is also playable and in great shape.
But 10% ? Thumbs up fellow :thmbsp:
Happy listening,
John
Thanks John! B-2 #2 has been providing me with happy listening off and on now for nearly 4 years and B-2 #1 for 6. I had similar good luck with my B-1 but I had to work a little harder to bring it back up to spec ... but that's for another thread.
To each their own but IMHO the B-2 is the finest sounding amp I've ever heard. Albeit I haven't listened to very many modern "hi end" amps; I haven't wanted to since I found the B-2.
ilimzn
Well-Known Member
VFET production in Japan
2SJ18/2SK60 (Sony)
2SJ20 / 2SK70 (NEC) - also there is an A version (higher maximum voltages)
2SK75 (YAMAHA) - there is also a 2SJ25 which not an exact complementary (same voltage and current limits but different amplification factor), never used in any Yamaha product.
2SJ26 / 2SK76 (YAMAHA) - A versions used in later B2 and all B3 amps.
2SK77 (YAMAHA) - there is also a 2SJ27 complementary part, never used in any product.
2SJ24 / 2SK78 (YAMAHA)
2SK79 (SONY) also 2SK63 is the same but older version in a metal case
2SJ28 / 2SK82 (SONY)
2SJ29 / 2SK89 (HITACHI)
2SJ38 / 2SK98 (YAMAHA) - these are low voltage parts and will not replace J26/K76.
2SK180/181/182(E) (TOKIN)
2SJ18/2SK60 (Sony)
2SJ20 / 2SK70 (NEC) - also there is an A version (higher maximum voltages)
2SK75 (YAMAHA) - there is also a 2SJ25 which not an exact complementary (same voltage and current limits but different amplification factor), never used in any Yamaha product.
2SJ26 / 2SK76 (YAMAHA) - A versions used in later B2 and all B3 amps.
2SK77 (YAMAHA) - there is also a 2SJ27 complementary part, never used in any product.
2SJ24 / 2SK78 (YAMAHA)
2SK79 (SONY) also 2SK63 is the same but older version in a metal case
2SJ28 / 2SK82 (SONY)
2SJ29 / 2SK89 (HITACHI)
2SJ38 / 2SK98 (YAMAHA) - these are low voltage parts and will not replace J26/K76.
2SK180/181/182(E) (TOKIN)
The B-2 is a special amp. How fortunate that such a great sounding amp was made in large numbers and is so durable.
It's a true music lovers amp.
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I regard myself as fortunate to have had a system comprising of the PX-2/C2x/B-2. Damn nice gear. I didn't find myself as impressed with the line stage of the C2x, as much as I was with then phono preamp, which I really liked.
I know that timofred who ended-up with all of them, likes them as much as I did.
I know that timofred who ended-up with all of them, likes them as much as I did.
samosui
Well-Known Member
I can't make up my mind if the B-2 sounds the best or the MX-2000 does. Isn't life difficult at times?
Seriously, I feel fortunate to have discovered Yamaha and found some nice keepers from the past.
Happy listening
John
Soimmvt
New Member
I can't make up my mind if the B-2 sounds the best or the MX-2000 does. Isn't life difficult at times?
Seriously, I feel fortunate to have discovered Yamaha and found some nice keepers from the past.
Happy listening
John
Yes it is
Switching from one yamaha set to another, I might have found musical nirvana.....A recapped C4 with a recapped B2:thmbsp:
