is there any reliable source for 2SJ313 and 2SK2013? spencer has no more stock.
can change the output to J162-K1058? any changes required?
can change the output to J162-K1058? any changes required?
The gm of the Vert mosFETs is many times higher than the gm of Lat mosFETs.
Yes, they do swap, but performance will be quite different.
Yes, they do swap, but performance will be quite different.
I've bought K2013/J313 from Prakit - http://www.diyaudio.com/forums/vendors-bazaar/232093-fs-tos-2sk2013-2sj313.html
Very nice guy to deal with.
Very nice guy to deal with.
Russell -
The heatsinks I used are massive overkill. (I had them on hand...) The transistors just need something on them to move the heat. The ones I linked are fine.
As for cap, use whatever floats your boat. (still, use a nice cap... 🙂 ) My preamp has a pair nice film Audyn, the power amp has 10uF Silmic bypassed with a nice film Rel-cap. A power amp I built with a friend has the Silmic bypassed with a small polycarbonate. Solen, Clarity, Dayton, whatever you have or want to order. If using an Electrolytic and bypass, use an Audio grade. (Nichicon or Elna)
The heatsinks I used are massive overkill. (I had them on hand...) The transistors just need something on them to move the heat. The ones I linked are fine.
As for cap, use whatever floats your boat. (still, use a nice cap... 🙂 ) My preamp has a pair nice film Audyn, the power amp has 10uF Silmic bypassed with a nice film Rel-cap. A power amp I built with a friend has the Silmic bypassed with a small polycarbonate. Solen, Clarity, Dayton, whatever you have or want to order. If using an Electrolytic and bypass, use an Audio grade. (Nichicon or Elna)
Is it ok to use JFET's ending in GR over BL The GR range 2.6mA~6.5mA and the BL's range 6.0mA ~ 12mA Want to make sure I get the right parts
Regards
Dave
Regards
Dave
If you can get the Toshiba BL (or Linear Systems B) that would be best in this circuit.
Gerd is correct, you could parallel 2 of the GR to get the Idss necessary to work.
Gerd is correct, you could parallel 2 of the GR to get the Idss necessary to work.
LSK170:
8 pieces of LSK170 ULTRA LOW NOISE SINGLE N-CHANNEL JFET - Parts
Looks like the shop is out of grade B though...
Dennis
There will be matched LSK170/J74 pairs and J74/J74 pairs for sale in the store in about a month.
And they are all B grade - the proper Idss for all the Pass Labs/Firstwatt projects. 🙂
And they are all B grade - the proper Idss for all the Pass Labs/Firstwatt projects. 🙂
Well my Diyaudio store chassis with 10mm front plate I got for the BA-3 as pre (only one available at the time of order) is presenting a mild problem. Face plate is a bit thick for shafts on my selector, on/off switch and volume pot to go through. Considered extensions, but the 3mm chassis just came available again, so I snagged one. Looks like I have a matching power supply box for the Pearl 2 now at least. (It also has 10mm front panel).
Russellc
Russellc
Could you have a machine shop mill the back side of the faceplate to make your switches work?
Probably, and the extension kit would to, as well as shortening the wiring. The face plate is thick enough for your idea, but I just ordered the 3mm version. I think they share the same rear panel, I guess I could go ahead and drill it for RCA jacks.
I do need someplace to cut a hole for the IEC unit. I do not want a raggedy drill out job, but a nice neat cutout. What kind of biz provides such a service?
I dont suppose Green Lee has a punch out in this shape? <Forget this, 350-400 dollar range!
Russellc
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Any small machine shop.
Thankfully there's a local guy in Grand Rapids MI that has a nice machine shop behind his house.
Let me know if you can't find anyone in your area. You could send it to me and I could get it done.