Make your own J201

[drolo]

and I thought I was asking too much from my poor eyes with the regular through hole soldering ....

Paul, when I check your youtube videos, I am always wondering what effects you are using in the starting clip with your logo?
A kind of S&H filter ?

[chromesphere]

and I thought I was asking too much from my poor eyes with the regular through hole soldering ....

Paul, when I check your youtube videos, I am always wondering what effects you are using in the starting clip with your logo?
A kind of S&H filter ?

Hey Drolo, when I was making that intro clip and I was looking for something I decided to use something 'significant'.  It's the clip from my first youtube upload.  The pedals used to make the effect are in the video description:

Paul

[drolo]

So it's the tremulus plus the small stone/clone ...nifty
It's a nice intro, very memorable :-)

[chromesphere]

Thank you Drolo.

Its funny when I first uploaded that video I had some guy post a comment saying how I should give up playing guitar and how bad it was for me to put 'crappy effects' through such a good amp.  I deleted his comment because I didn't know what to do with the criticism.  I was turned off uploading videos and didn't upload for a while.  But I got over it.  And ever since making it the intro clip, I get compliments about it all the time.

Don't let abuse from idiots on the internet stop you I guess is the moral?

Paul

[drolo]

Don't let abuse from idiots on the internet stop you I guess is the moral?

Paul

Absolutely!
It's strange how the internet is full of people who are just waiting to lash out at someone randomly.
It just goes to show how bad people are doing and how messed up their abilities to relate with other peers have become.
The same aggressive people on the internet are probably the ones that will never dare to rebel or say what they are thinking in real life ... if they know what they think or like at all

Where's the love ??
(voila, I'm all hippie and rambling again ...)

[Digital Larry]

J201's cost anywhere from $.50 to $2.00 now.

The ones from tayda don't even seem to be lefit ones anymore, way out of spec.

Er... what spec is not matching?  I'm going to be spec'ing an N-channel JFET for a front-end source follower/buffer and/or common source gain stage with a gain of 2 or 3.  Haven't built anything in a long time but I'm about to start up again.  I'm also not averse to making the PCB footprint an SMT if that is a way to get better results.  Ultimately you are at the mercy of your supplier and unless you check each one I'm not sure how you're going to know what you have.

[pappasmurfsharem]

J201's cost anywhere from $.50 to $2.00 now.

The ones from tayda don't even seem to be legit ones anymore, way out of spec.

Er... what spec is not matching?  I'm going to be spec'ing an N-channel JFET for a front-end source follower/buffer and/or common source gain stage with a gain of 2 or 3.  Haven't built anything in a long time but I'm about to start up again.  I'm also not averse to making the PCB footprint an SMT if that is a way to get better results.  Ultimately you are at the mercy of your supplier and unless you check each one I'm not sure how you're going to know what you have.

I don't recall off hand there have a been a few threads of "fake" J201s coming from Tayda with pictures showing physical differences and I believe audible differences.

They may not be fake as I can't recall if the thread included someone commenting on a build failing because of them, but I'd be leery.

[mistahead]

There were some pictures here of the JFETs where the graphics work was clearly substandard, sanding marks could be seen on the TO-91 cases, measuring them gave WILDLY unexpected results, off-setting those oddities with circuit modification resulted in less satisfactory sounds...

Ebay was a source, and I believe Tayda may have also been burned by this, however I can't be sure personally - mine were all bought up from Farnells, before they became Element14 or whatever.

Anyone out there have issues with trusting any global electronics vendors with securing credit card info? PM only as if my theory is wrong it would be slander/defamation to publically discuss.

[chromesphere]

Yeah thats what i heard.  Joker measured some of these and reported they had tighter specs then the throughhole j201.   Cant confirm or even explain it (fet's elude me) but there you go!

Paul

[Willverine]

Just to add my two cents: the local electronics store has NTE J201-equivalent transistors for $7.00 a piece when most others are $1 at the most!

[pappasmurfsharem]

I bought 100x SMD J201's from mouser. I etched a small adapter board and wouldn't you know it didn't realize I did it backwards

Kids were sleeping so I couldn't re-etch at the moment and I'm impatient so I used Vero and it worked perfectly for my Dr Boogie

Here is the layout

Use a 4x4 vero piece. Cut between the bottom tracks. and place the wire legs through the other non copper side. It's hard to tell from the layout but the legs should not be in the same side as the SMD. If you angle the legs as shown they will line up perfectly

Also you want to place the J201 a little on the higher side because the two bottom legs will sit just above the bottom holes.

[pappasmurfsharem]

double post

[psychedelicfish]

J201's cost anywhere from $.50 to $2.00 now.

The ones from tayda don't even seem to be lefit ones anymore, way out of spec.

Er... what spec is not matching?  I'm going to be spec'ing an N-channel JFET for a front-end source follower/buffer and/or common source gain stage with a gain of 2 or 3.  Haven't built anything in a long time but I'm about to start up again.  I'm also not averse to making the PCB footprint an SMT if that is a way to get better results.  Ultimately you are at the mercy of your supplier and unless you check each one I'm not sure how you're going to know what you have.

I tested 7 of my tayda "J201s" and these were my results:

VGS(off)	IDSS
1.3	1.4
1.26	1.2
1.35	1.5
1.44	1.6
1.15	1.0
1.48	1.7
1.16	1.1

They were all in spec for V_GS(off, however all but one of them had far too high I_DSS