I'm hoping Lady Gaga lets it rip. I saw Anthony Bourdain visiting a very un-PC bar in Chicago with a nude portrait of our prez definitely lacking a tower.
It can be free if you have the right attitude! My cousin Joey hitched rides to the game, stayed with new found friends, got a temporary job on the grounds crew and hitched home. Total expenses less than $20.00. He didn't even ask me for anything.
Now I expect to be paid to go to pretty much any professional game.
Ever drain used beer out of conduits under the seating area? Ah the glamour of doing these events!
I had friends that used to work the concessions like that. The last NFL game I attended was a 1967 playoff, box seats were $15.
Don't worry just keeping things light. I have a few LP's that I use like Decca Argo ZK-1, "Noye's Fludde" or Psychic TV's "Dreams Less Sweet" (actually incredibly well recorded) or the must have Harvest Japanese pressing of DSOTM or several RCA/JVC Italian pressings of Morricone's film music. Oh I forgot I have John's favorite Crystal Clear direct to disk LP.
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That's the problem with "super" disks, you have to listen to them. I have a pile of Sheffield Labs too.
When aged 15 I picked up a copy of 'the fox touch vol2' from crystal clear I was very impressed with the performance of the Vidor toccata. It was 20 years before I realised that you just couldn't play it that fast in a church!
Mine is Charlie Byrd, just checked Discogs CC did do a lot of shite. Guitar and 70's choral vocalization version of "Just the way you are", where is the gong.
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About 5 years ago, we had a discussion (here but also at another thread) about whether the Toshiba JFETs are drain-source reversible.
I curve traced quite a few of them and found no difference in Id vs Vgs when D-S pins are reversed.
http://www.diyaudio.com/forums/anal...discrete-opamp-open-design-5.html#post3139062
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3186846
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3187478
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3186902
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3187325
But I was challenged by PM that Cdg and Cgs will not remain the same when reversed.
I do not know enough about transistor physics to answer this one.
But maybe Scott and others could help ?
Thanks in advance,
Patrick
I curve traced quite a few of them and found no difference in Id vs Vgs when D-S pins are reversed.
http://www.diyaudio.com/forums/anal...discrete-opamp-open-design-5.html#post3139062
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3186846
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3187478
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3186902
http://www.diyaudio.com/forums/anal...iscrete-opamp-open-design-29.html#post3187325
But I was challenged by PM that Cdg and Cgs will not remain the same when reversed.
I do not know enough about transistor physics to answer this one.
But maybe Scott and others could help ?
Thanks in advance,
Patrick
Nonsense, the jfet structure in silicon is geometrically and physically perfectly symmetrical. There may be some new exotic jfet geometries, but certainly don't apply to the good old jfets.
Besides, I don't think you could have an only Cdg and Cgs effect without affecting Id vs. Vgs, since different C's need different areas, therefore different current densities, etc...
P.S. The picture below doesn't show the Vds effect, pinch, etc... It is only conceptual.
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Easy enough to determine by experiment:
Connect 5 JFETs in parallel, each one has Source=GND, Gate= -8.0V, Drain=OUT. Drive OUT with a 0V to 5V square wave through a 1 Megohm series resistor; observe OUT with a TL071 or other high bandwidth, high Zin opamp connected as a unity gain follower. Snap scope photos of rising edge and falling edge of OUT.
Now reverse all 5 JFETs, swapping source and drain. Now Drain=GND, Gate= -8.0V, Source=OUT. Again drive OUT with a 0V to 5V square wave through a 1 Meg series resistor, and again snap scope photos of rising edge and falling edge of OUT.
If scope photos are identical, Cgd is identical to Cgs.
Connect 5 JFETs in parallel, each one has Source=GND, Gate= -8.0V, Drain=OUT. Drive OUT with a 0V to 5V square wave through a 1 Megohm series resistor; observe OUT with a TL071 or other high bandwidth, high Zin opamp connected as a unity gain follower. Snap scope photos of rising edge and falling edge of OUT.
Now reverse all 5 JFETs, swapping source and drain. Now Drain=GND, Gate= -8.0V, Source=OUT. Again drive OUT with a 0V to 5V square wave through a 1 Meg series resistor, and again snap scope photos of rising edge and falling edge of OUT.
If scope photos are identical, Cgd is identical to Cgs.
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there can be parasitic C differences from geometry of die, metallization, and pin order - all independent of device physics
I posted a picture of an SK170 die here years ago jcx is right there are trivial differences due to layout, etc. The basic die is completely symmetrical. This is not true of some RF FET's where there are only two drain stripes and three source stripes and a few pF's matter.
Of course just like a diff-pair there are trivial differences in Vp and Idss when drain and source are flipped these are likely to be completely random. Essentially ALL JFET's are symmetrical by their nature. Claims of "huge" sonic differences should be regarded with skepticism as usual.
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Toshiba complementary jfets are usually symmetrical in layout, but some Siliconix N channels were not completely symmetrical, like the 2N5564.
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