If you look carefully at Deep Surplus website, the remaining quantity is dwindling - epecially the low Vgs values. I would order a bunch of stuff left to keep for future projects if you want matched units with original (non-exteneded) pins.
I agree they are probably real as the low level of interest doesn't warrant fakes like NP mentioned. Mine sound really nice anyhow.
I tried to order from Deep Surplus, but they're out.
So I've placed an order from China instead. I noted that many of the sellers are showing pictures of ones with a diode symbol on the front. Not sure what those are, but the ones I ordered look like xrk971's.
So I've placed an order from China instead. I noted that many of the sellers are showing pictures of ones with a diode symbol on the front. Not sure what those are, but the ones I ordered look like xrk971's.
Hi Nelson,
What's a minimum order look like?
(And while we're here, do you sell your chassis heatsinks separately? Or entire chassis?)
What's a minimum order look like?
(And while we're here, do you sell your chassis heatsinks separately? Or entire chassis?)
I don't have enough of those chassis left to consider selling them.
As to minimum order of the Jfets, the more you want, the cheaper they
will be. Also consider that selected Jfets are more.
As to minimum order of the Jfets, the more you want, the cheaper they
will be. Also consider that selected Jfets are more.
I see plenty of LU1014 in stock at Deep Surplus:
LU1014
Also, xrk ordered his LU's from China as well, so I wouldn't take the fact that yours look his as proof that they are genuine. Of course, they are a rather obscure part, so are probably not as high on the list of parts to counterfeit. So, the parts may well be genuine.
They don't appear to keep their website bang-up-to-date. Try to order a pair and you'll get:
Hi Nelson,
I tried to contact you via PM regarding the LU1014s, but no worky (not sure if you have PMs off, or if it's just that I'm not a "full user" yet).
Anyway, if you could contact me at jeff (at) rokeby (dot) ie when you get an opportunity, I'd appreciate it.
Cheers,
Jeff.
I tried to contact you via PM regarding the LU1014s, but no worky (not sure if you have PMs off, or if it's just that I'm not a "full user" yet).
Anyway, if you could contact me at jeff (at) rokeby (dot) ie when you get an opportunity, I'd appreciate it.
Cheers,
Jeff.
I don't find myself with enough time to tend to all forms of
communication, so rather than neglect the PM's I shut them
off.
communication, so rather than neglect the PM's I shut them
off.
Why don't you guys just use the LME49600 if you want a headphone amp? Much easier and much better.
I need them for a F3 where 250mA probably won't do the trick. (I've got a Bottlehead S.E.X. and a DIY Torpedo III underway for phones.)
Like JeffYoung said, he is looking to build a power amp for speakers, not headphones. Aside from that, many of us here in the Pass Labs forums believe simpler circuits sound better - even more so with headphones where the power requirements are so low. Integrated circuits like the LME are anything but simple. An amp using that chip likely measures better than the things we build and may sound pretty good. But, measurements aren't everything, and better sound can often be had using a few discrete parts in a simple circuit. At least for me, an amp using a chip just isn't my cup of tea.
They were talking about headphones ?
Will surely drive this :
https://www.innerfidelity.com/conte...ealed-planar-magnetic-headphones-measurements
Patrick
Will surely drive this :
https://www.innerfidelity.com/conte...ealed-planar-magnetic-headphones-measurements
Patrick
Just realized the first post is also about headphones. JeffYoung is looking for parts for an F3, though. My post above was based on recent activity in this thread, and not on the original topic... Sorry for contributing to the confusion.
Since there is such interest after all these years, I am posting some pdf
documents that you will find useful.
The LU1014D you probably have already, as well as the F3 owner's manual
which is also found at FIRST WATT - in particular, the performance curves
of a production unit.
The full schematic of an F3 channel you might not have, so here it is also.
Not previously seen is the measurement information for selecting the Jfets
and the data on a sampling of the actual parts tested for this amplifier,
along with the calibration curve for minimum distortion via choice of R5
against the Vgs results of the selection test.
documents that you will find useful.
The LU1014D you probably have already, as well as the F3 owner's manual
which is also found at FIRST WATT - in particular, the performance curves
of a production unit.
The full schematic of an F3 channel you might not have, so here it is also.
Not previously seen is the measurement information for selecting the Jfets
and the data on a sampling of the actual parts tested for this amplifier,
along with the calibration curve for minimum distortion via choice of R5
against the Vgs results of the selection test.