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Old 4th October 2012, 12:40 AM   #2221
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Default Candidate Conceptual F6 schematics; maybe?

Got three of them. Their base schematics are those shown in the article by Mr. Pass which is entitled: "The Zen Variations-Part 2; The Penultimate Zen's Current Sources. The attached file is ConceptualF6#0. I added a large bypass capacitor across R1, a blocking capacitor C2' at the collector of ZTX550, and of course the Jensen transformer. I hope that I got the phasing of the signals correctly on the secondaries.
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File Type: pdf ConceptualF6#0.pdf (111.2 KB, 74 views)
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Old 4th October 2012, 12:46 AM   #2222
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Default Candidate F6 schematics; maybe?

Quote:
Originally Posted by Antoinel View Post
Got three of them. Their base schematics are those shown in the article by Mr. Pass which is entitled: "The Zen Variations-Part 2; The Penultimate Zen's Current Sources. The attached file is ConceptualF6#0. I added a large bypass capacitor across R1, a blocking capacitor C2' at the collector of ZTX550, and of course the Jensen transformer. I hope that I got the phasing of the signals correctly on the secondaries.
Here is the second one ConceptualF6#1.pdf: I believe my additions to the basic skeleton are clear, and I have the correct signal phasing on the transformer secondaries.
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File Type: pdf ConceptualF6-#1.pdf (106.9 KB, 56 views)
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Old 4th October 2012, 12:53 AM   #2223
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Default Candidate F6 schematics; maybe?

Quote:
Originally Posted by Antoinel View Post
Here is the second one ConceptualF6#1.pdf: I believe my additions to the basic skeleton are clear, and I have the correct signal phasing on the transformer secondaries.
The third schematic is ConceptualF6#2.pdf which is a Jensen transformer-coupled Aleph current source. Use JFETs instead of MOSFETs in the three candidate schematics so as to be commensurate with Conceptual F6 methodology.
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File Type: pdf ConceptualF6#2.pdf (42.4 KB, 70 views)
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Old 4th October 2012, 05:42 AM   #2224
lhquam is offline lhquam  United States
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Nelson:

I am trying to understand the mechanism of the secondary loading on the harmonics. With the Jensen JT-123-FLPCH I haven't been able to detect a significant effect from secondary loading.

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Originally Posted by Nelson Pass View Post
You are overlooking another location for trimming the cancellation, which is
resistance across the secondary coils. Typical values would be on the order
of 200 ohms or more.

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Old 4th October 2012, 07:09 AM   #2225
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Wouldnt altering the resistance/impedance of the secondary affect the reflected impedance and thus voltage ratio/amplification factor, changing the gain sligjtly. Similar to what Zen pot does on output. Dunno,just guessing.. Gotta go lay baby girl down.. sweet dreams!
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Old 4th October 2012, 08:55 AM   #2226
Zen Mod is offline Zen Mod  Serbia
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load/unload two secs differently
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Old 4th October 2012, 09:22 AM   #2227
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Makes divider with gate stopper?
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Old 4th October 2012, 10:12 AM   #2228
generg is offline generg  Germany
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Quote:
Originally Posted by Zen Mod View Post
load/unload two secs differently
that´s it!
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Old 4th October 2012, 10:40 AM   #2229
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by bobodioulasso View Post
Makes divider with gate stopper?
nope

just resistor across secondary,creating constant load

same as you walking with or without sack of cement on your shoulder(s)

or constant felt brake under EMT927/930 platter



Quote:
Originally Posted by buzzforb View Post
Wouldnt altering the resistance/impedance of the secondary affect the reflected impedance and thus voltage ratio/amplification factor, changing the gain sligjtly. Similar to what Zen pot does on output. Dunno,just guessing.. Gotta go lay baby girl down.. sweet dreams!
loading secondary will decrease amplitude

so , speaking of directly altering modulation of gate , not influencing xconductance shape , as with ZAP
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Last edited by Zen Mod; 4th October 2012 at 10:43 AM.
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Old 4th October 2012, 10:54 AM   #2230
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Quote:
Originally Posted by Zen Mod View Post
nope

just resistor across secondary,creating constant load
Of course, gate stopper is negligible in front of high Z gate.
I am stupid.
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