Pars

Thanks. I guess one more thing to do on this thing Is that (paradoxper) who built this? Or was this one from Dukei?

Working on a CFP3 for Todd, and had a question as to why a couple of caps aren't populated. This has switching for SS or ZF implemented. It's consistent in all 4 locations on the 2 boards.

Happy Birthday!

The diyaudio store offers matched quads (2 N, 2 P) of the singles also. https://diyaudiostore.com/collections/jfets/products/linear-systems-matched-jfets?variant=30120611840034

Micross in the UK was the one I was thinking of. Take a look here: http://www.linearsystems.com/purchase.html It would be nice if Linear would just go thru normal distributors like Mouser, Digikey, etc.

The only ones in your list currently available (without contortions) are the Linear Systems LSK489 / LSJ689. These are available from Trendsetter in the US. I'm not sure who in Europe carries them. You didn't indicate where you are, but judging by the Farnell I assumed Europe.

I noticed that you didn't tap the holes in the bracket for the screws? Any reason? Seems better to me than using nuts on the bottom. Also, I don't believe the metal rings on most of Kevin's boards are connected to anything.

Oh no no no... a GE Wildcat is what u really need. I can personally vouch for its awesomeness! https://www.ebay.com/itm/General-Electric-Wildcat-Vintage-GE-Turntable-Portable-Record-Player-Working-Tan/324509893961?hash=item4b8e4c0549:g:AbIAAOSwXh5gRCvK

Happy belated Birthday!

Schubert?

I probably have extras. Let me check. The gerbers for the ones I did aren't on Kevin's site. I've attached them here. THAT340-TO71.zip

Most kind of you. Yes, I would like a pair. PM me and we can discuss.

Adapter boards that I layed out and were in one of the GBs. I think you could just plug them into a 14 pin socket with no lead bending, but if I recall correctly, one of the JFETs would be backwards. No big deal on the Toshibas, at least according to John Curl. I presume the Linear Systems would be OK as well.

Not sure who you are asking, but no, I don't have any, and they probably would not be for sale if I did.

When I used the Linear duals, because of cost, I didn't bother matching them N to P. Kevin has said the CCS takes care of it anyway. If doing singles, if you can get them matched including N-P without a huge premium, I'd do it.

Cool. Thanks Kevin!

Unclear. Going back in the thread, I had posted this, as the schematics I have don't appear to have this fix in place. Shortly after this post, you released new gerbers including all fixes. However, there was an error with a 10K resistor connecting to a device emitter instead of the base. Not sure whether the fixes mentioned were in only referring to this or also included the servo fix. I don't see a pair of 15K resistors, as were used in the CFA2 fix, on the gerbers.

@kevin gilmoreDo the current gerbers (cfp3rs and cfp3rss) have the servo/current mirror correction done to the CFP2 on them? Or don't they need it? Thanks!

Does anyone have a pair of CFP3 boards they want to get rid of? Also, I see two sets of Gerbers: cfp3rs and cfp3rss. Is the difference the revised servo/current mirror? I'm assuming the cfp3rss is the most recent? Thanks!

Happy Birthday Nate!

Yes, not cheap, but considering it is a matched quad, approx. $11@. And generally unobtanium. The diyaudio store charges $39 for a similar matched quad of the Linear Systems devices (2 N, 2 P).

^ Reputable seller of genuine devices.

Is the one on the right a 2U? Looks to be 1U from the pic. The SlimLine have 10mm sides which would be sufficient for heatsinking for many applications.

Happy Birthday Craig!

The LSJ109 is (was?) a dual JFET, but not in the same package as the Toshibas were. For thru-hole, it is available as a TO71 can package with 6 leads. It seems as though these are either discontinued or just not available. Your alternatives are to use the LSK489 / LSJ689, or use the singles. The 489/689 is what I have used. The diyaudio store sometimes has the singles: https://diyaudiostore.com/collections/parts/products/linear-systems-matched-jfets