Zen Mod at the moment I get a heavy oscillation using the ISKRA.
I thought I was clever enough to wire it up in the right way after the Jensen and the Edcor..... unfortunately not.
could you mark me the pins according to Jensen and sleeve 13..please.
oscillation was so heavy that the whole house was rocking....😀
I thought I was clever enough to wire it up in the right way after the Jensen and the Edcor..... unfortunately not.
could you mark me the pins according to Jensen and sleeve 13..please.
oscillation was so heavy that the whole house was rocking....😀
Attachments
kasey197: I hope that DIYers consider using bjts as a viable option in the output stage of F6. Mr Pass said in his seminar that his F6 design improved the old classic [with bjts] by referencing the biasing scheme of upper JFET to ground. And, returning loop feedback to the other lead of the primary winding of the transformer. They are real enhancements which maybe worthy to implement in an old classic revisit.
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I would have answered this earlier, but I just woke up. 😎
Anyway, that's interesting, although it seems non-intuitive to me, and I
haven't run into issues over sever iterations. In any case, 100 uF is fine
with me.
😎
Now that the cat's out of the bag via BAF, here is the official F6 schematic.
There are several versions, but I am building 10 channels of this for in-house
use. There is a version without the input buffer, and a couple of versions
showing degeneration on the input devices and degeneration on the outputs,
which I have not chosen to use.
😎
There are several versions, but I am building 10 channels of this for in-house
use. There is a version without the input buffer, and a couple of versions
showing degeneration on the input devices and degeneration on the outputs,
which I have not chosen to use.
😎
Attachments
Generg , I don't have data in this pc for those repeaters
anyway - make like this :
P means primary , S means secondary
on P side , solder together ( brucke ) La pin with Sb pin ; same - Sa with Lb ;
now your primary is La-Sa , and say that La is having punkt ( use marker for that)
one secondary is La-Sa , another one is Sb-Lb
now connect sig gene (1-2Vac is enough) to primary , observe sig with scope first on primary , then on each secondary , trying to orient scope probe ( hot and gnd of it ) to have same phase as on primary
when you have that , just mark hot pin of secondary with marker
if you don't have scope near you , there is another way of doing it
edit - when you finish this , write back for exact pinout , if needed
little info , for different purposes , but useful
I drew that few months ago for some greenhorns
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wait for article , even if it's easy to grasp it , just listening to audio capture of Papa's BAF lecture
For those who have not suffered the audio file, the question will arise about
the degeneration.
a) Like with regular feedback, I use it only when it furthers my purpose
b) Undegenerated outputs on this circuit extend the class A region at the
specified bias by about 75% more.
😎
the degeneration.
a) Like with regular feedback, I use it only when it furthers my purpose
b) Undegenerated outputs on this circuit extend the class A region at the
specified bias by about 75% more.
😎
