F6 Amplifier

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let's just say that Iq was in 1A55 ballpark

somewhere earlier I gave little table of SJEP tempco at 2A (or something like that ) , so I'm expecting that , on value what I think I heard in Pa's Lecture , it's spot on dead ..... or dead spot on

:clown:

so , let's Iq be a pulsar , not ookin' Ugs :rofl:

btw. guys - flocchini didn't asked for Iq measuring procedure , but for expected Iq , for PSU calculus purposes

ZM,
I think I got this number for dissipation in my head from the speech. I am going to match some transistors this weekend.
I think around .75A @ 23-24v ballpark would be best for F6.
Do you agree?
 
Do it, it is one of the easiest PTP I made, only thing is to check twice the polarity of the windings to be correct.

@ ZM ISKRA adventure continues tomorrow, my wife has a cold and I have to do the household and some more....:D

Again a big thanks - I have a pair of Bud P transformers in addition to the Jensens and the windings are different. Wiring to the transformer is an idea I had'nt thought of - would be an easy way to compare transformers :D - Power supply first then .....

Best

Bob
 
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I had my crappy F6 at 1.5A per fet not per channel. I wonder if that is what ZM is eluding to.

considering that ( hopefully) current going through one Jfet is having to go nowhere but other Jfet , that means that you're having 1A5 through both Jfets,and there are no more than these two outputs per channel , so that's 1A5 per channel

wakooyank

:rofl:
 
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The one and only
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Yes, I showed several more versions, degenerating the input stage, the
output stage, and your variable arrangement, crediting the discussion on this
thread for the last.

:cool:

variable arrangement , known as Zen Amount Pot , originated from Generg (playing with Babelfish J2 , or some other derivative ; can't be sure - our personal correspondence is sorta hysteric in organization :rofl: ) and it's documented somewhere in some thread :clown: ; I was there with him only to mess things , as usual

that public thread was maybe ACA , maybe not .

lhquam made more than lion's share of investigating multiple combinations of two ZEPs together , in F6 .

buzzforb introduced it here :

My post did not include ZM's emoticon laughing. That was what i was responding to. ZM knows too much to just be laughing for no reason.

ZM, Would pot across top Rs with center pin feeding cap give some adjustability of the output and THD performance?
 
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The Mystery Man came over
An' he said: "I'm outa-site!"
He said, for a nominal service charge,
I could reach nervonna t'nite
If I was ready, willing 'n able
To pay him his regular fee
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And devote His Attention to me
But I said . . .
Look here brother,
Who you jivin' with that Cosmik Debris?
(Now who you jivin' with that Cosmik Debris?)
Look here brother,
Don't you waste your time on me

The Mystery Man got nervous
An' he fidget around a bit
He reached in the pocket of his Mystery Robe
An' he whipped out a shaving kit
Now, I thought it was a razor
An' a can of foamin' goo
But he told me right then when
the top popped open
There was nothin' his box won't do
With the oil of Afro-dytee
An' the dust of the Grand Wazoo
He said:
"You might not believe this,
little fella, but it'll cure
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An' I said . . .
Look here brother,
Who you jivin' with that Cosmik Debris?
(Now what kind of a geroo are you anyway?)
Look here brother,
Don't you waste your time on me waste yer time . . .

I've got troubles of my own, I said
An' you can't help me out
So take your meditations
an' your preparations
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"BUT I GOT A KRISTL BOL!", he said
An' held it to the light
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All away from him
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I wrapped a newspaper 'round my head
So I'd look like I was Deep
I said some Mumbo Jumbos then
An' told him he was goin' to sleep
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An' pocket watch
An' everything else I found
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He couldn't even make a sound
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As long as he was hanging around,
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Look here brother,
Who you jivin' with that Cosmik Debris?
(Now is that a real poncho or is
that a Sears poncho?)
Don't you know,
You could make more money as a butcher,
So don't you waste your time on me
(Don't waste it, don't waste
your time on me . . . )
Ohm shonty, ohm shonty, ohm shonty-ohm
SSHONTAY


FRANK ZAPPA COSMIK DEBRIS - YouTube