Thank you and one day I hope to match your work quality too.awesome, very nice work
I will be following this !
Multumesc!I will also follow this, rottalpha! Nice work.
You are so fortunate with those B1s!
Thank you!
Some notes here:
Schematic calls for 2sa673A and for 2sc458s. For the c458s, I found 2sc1571s instead on the board. These are rated as low noise trannies. It looks like Yamaha ended up using something with even better noise floor than the 458s,.
For hFE, the NPNs were in the ~390-430 hFE range, the PNPs were in the mid 100 range. The nice thing about the replacements I used is that I was able to match them for hFE across the line ~430, both, NPNs and PNPs
BTW, has anyone noted the stock for the KSC1845s at the large US retailers??
I suspect these will eventually end up going away..RC still has some on stock in UK...but not for long. They had about 2k in stock. A couple of hundred coming my way.
yes they are...There are plenty of KSC1845FTA's in stock, aren't they the same?
Thank you Mark! Couple of more weeks I will be done, I think.Beautiful work! The B-1 is an amazing amp.
Cleaned, lubbed and nicely back togheter.
https://www.newegg.com/Product/Product.aspx?Item=N82E16835186056What do you use to lube?
yes they are...
about a week ago they had none..neither did digikey
Edit: Wait, at Mouser, they have ZERO in stock and a bunch on order...same as the other week.
one nice thing about the last batch I got is that they are nearly identical in terms of hFE...all right around 430.