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Old 15th June 2012, 12:07 PM   #781
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OK
I will check that out
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Old 15th June 2012, 12:48 PM   #782
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M2 is next in que for me. Looking into Cinemag and Electrprint transformers. Run the transformer into a phase splitter/PLH or phase splitter into circlotron. NO feedback all the way through. Way more complex than Nelson's version, but may be interesting. Looked into Vbe multiplier as another optin after transformer for output bias, but i suck at bjt circuits.
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Old 15th June 2012, 01:51 PM   #783
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Buzz, OT but, the xfrmr is a phase slpitter?
I have an LL7905 I'm getting ready to insert into an F4 circuit. Don't kinow if I can drive all 3 FETs well enough though.
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Old 15th June 2012, 02:28 PM   #784
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The phase splitter would come after the transformer to present it with higher Zin. i believe Vbe multiplier can be used in similar fashion to tL431 after trasnfromer as well. All this is assuming wiring it as an autoformer for increased bandwidth. Havent tried it yet, just info gleaned from reading and processinging through weak mind. If you leave input Jfets in F4, then i dont think there is any issue, just plug in step up transformer. Not knowing much about transformers, i think the output wants to see a high impedance. Phase spitter idea came from Sy's impasse. It needs to see equal load on drain and source to work properly, so circlotron might be best/only route over PLH output. MAy sit down and try to do the math this weekend, but i doubt ill get to it. It is possible that none of this works
PS. Ilike non feedback circuits as you might can tell
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Old 15th June 2012, 02:34 PM   #785
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boyz

I'm loosing ya from post #777
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Old 15th June 2012, 02:45 PM   #786
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boyz

I'm loosing ya from post #777
Yeah. Me too
I'm losing myself
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Old 15th June 2012, 02:52 PM   #787
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so , let's just ignore posted questions

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Old 15th June 2012, 03:10 PM   #788
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Sorry, Too much time on my hands today
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Old 15th June 2012, 03:31 PM   #789
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so , let's just ignore posted questions

Never the less, that was a genuine question.
Nelson also makes a similar remark in his SIT paper.
I am guessing he is referring to source resisors, but I am clutching at straws really.
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Old 15th June 2012, 04:31 PM   #790
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Put a 550 ohm R in the output of your B1 and call it a 600 ohm source? Put no R in the output of your B1 and call it a 50 ohm source. What can't you understand.
My sig gen is a 50 ohm output. If I don't terminate the ouptut in 50 ohms(add an extra 50 ohm cause the next equipment input Z is 20k) the output amplitude will read double what it should.
All this source R stuff adds up. If you have input C you would be figureing out what bandwidth is possible. If you have low input C you don't care... This has been a reoccurring theme in N.P. stuff for years
ZenMod buddy, what thread do you think you are in? It's not!
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