John Curl's Blowtorch preamplifier part II

[simon7000]

Allow me a question OT: any alternative / comerative for 2N6550 (N-channel JFET)?

Thanks in advance...

The 2n6550 is still in production and there is even a Swiss distributor (juergen.ockens@implement-gmbh.com). It is also available from some stocking distributors (https://www.sierraic.com/2N6550).

Are you looking for a lower cost approach?

ES

 

[simon7000]

Don't worry. The middle simon can put the antimatter into the bybee slipstream. Luckily, bybees have a slipstream..

jn

Not a slipstream a slippery...

I am tied up for the next few weeks, but by then my other resistors should be in. So until then stay on the edge of your seats awaiting more results.

However JN I can think of several circuit theory reasons for the measurements shown.

But the point was that if one measures carefully enough a Bybee is different from a resistor.

Now I could accuse SY of being a knuckle dragging slobbering fool, except he played with the small Bybee and I used the big one.

ES

P.S. How can you tell when a stage is level?

 

[SY]

But the point was that if one measures carefully enough a Bybee is different from a resistor.

Any more different than one type of resistor to another?

 

[simon7000]

Any more different than one type of resistor to another?

Since I only have one sample to compare it to at the moment... But it is way different from that one.

 

[jneutron]

However JN I can think of several circuit theory reasons for the measurements shown.

I've already given them. Ls and Rs.

Oh, let's not forget test setup parasitics.
jn

 

[simon7000]

I've already given them. Ls and Rs.

Oh, let's not forget test setup parasitics.
jn

Ah what a poor imagination! You missed EMI and thermal. Of course there is the one that terrifies you, near superconductivity Maxwell's demons! (Demons according to many published sources are quite scary! )

The possibility exists that there may actually be something interesting!

 

[jneutron]

Any more different than one type of resistor to another?

Or even to itself.

jn

 

[SY]

Or even to itself.

jn

Bingo. R&R, how does that work?

 

[scott wurcer]

Dick Sequerra says HI to Scott Wurcer. You should call him sometime.

Dick is a good guy, we agree on some and not on other things, much respect to him still being active in this stuff.

Like anyone Dick can call me anytime, I don't block any callers.

 

[john curl]

Well, Dick and I agree on a lot of things, including Bybee's and FM distortion. He is an incredible resource, if you can accept his input.

 

[jan.didden]

"Do you think he can live a normal life, doctor?''
"No. He'll be an engineer"


jan

 

[Joao@AltheaMusica]

The 2n6550 is still in production and there is even a Swiss distributor (juergen.ockens@implement-gmbh.com). It is also available from some stocking distributors (https://www.sierraic.com/2N6550).
Are you looking for a lower cost approach?
ES

Thanks for the info. Didn't realize that it is still in production. Only as 2nd-source, is there an equivalent type?

Joao

 

[scott wurcer]

Well, Dick and I agree on a lot of things, including Bybee's and FM distortion. He is an incredible resource, if you can accept his input.

I didn't know there was any disagreement on FM distortion, just that it is not in-harmonic which is not possible.

 

[DF96]

Does the Bybee demon understand Bessel functions?

 

[jneutron]

Does the Bybee demon understand Bessel functions?

Does anybody really understand Bessel functions??

jn

 

[Steve Eddy]

Does anybody really understand Bessel functions??

se

 

[DF96]

I never understood them, but I suspected that it was due to some sort of mental block because I could cope with other basis functions.

I just thought that maybe a Bybee could improve FM distortion by calculating what error the IF filter had introduced and compensating for it?

 

[john curl]

Bybee's and FM distortion are different phenomena.

 

[scott wurcer]

Mesoscopic physics, something new to not understand. Talks about quantum noise though.

http://arxiv.org/ftp/cond-mat/papers/0501/0501208.pdf

 

[john curl]

Jack and I went to the UCB bookstore more than 15 years ago, to buy what we wanted to get. I bought an HP calculator, Jack bought a book on Mesoscopic physics. This was the first time that I had noted the word 'mesoscopic'. Jack also loaned me a textbook at that time that included 'quantum filters', but the math was over my head, so I returned it.