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Old 6th October 2012, 06:37 PM   #2281
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Default Potential high OLG for F6 clones.

Quote:
Originally Posted by Zen Mod View Post
be aware that , without attenuating net , that hunt can be extremely short
and , after that , no further need for any sonic hunt

My thanks again ZM for subtly pointing out the voltage gain of the BA 3 Front End [FE]. I do not know its numerical value; but here is the connection which followed: By comparison with BA 3 FE, the FE of Conceptual F6 has unity gain. So, an OLG much higher that currently attained in the clones of lhquam, buzzforb and others is potentially at hand by replacing the FE in Teaser-6 and Franken6 etc with BA 3 FE.
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Old 6th October 2012, 06:54 PM   #2282
generg is offline generg  Germany
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to tame the BA-3 frontend you could use this variant with feedback....

Burning Amp BA-3b (Balanced)

but of course you have feedback in the system now.....
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Old 6th October 2012, 06:57 PM   #2283
Zen Mod is offline Zen Mod  Serbia
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@ Antoinel

I'm having slight impression that you're nutz almost as me ........

looking 10 days back , only I posted more useless and confusing posts than you ........
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Old 6th October 2012, 07:16 PM   #2284
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Quote:
Originally Posted by Zen Mod View Post
@ Antoinel

I'm having slight impression that you're nutz almost as me ........

looking 10 days back , only I posted more useless and confusing posts than you ........
I am working hard to be as nutz as you. Fat chance! I surely hope that my posts are not confusing. But; I am more than willing to explain further and to any length needed anything I wrote which was not clear to you.
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Old 6th October 2012, 07:17 PM   #2285
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Quote:
Originally Posted by generg View Post
to tame the BA-3 frontend you could use this variant with feedback....

Burning Amp BA-3b (Balanced)

but of course you have feedback in the system now.....
Thanks generg.
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Old 6th October 2012, 07:22 PM   #2286
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Quote:
Originally Posted by generg View Post
to tame the BA-3 frontend you could use this variant with feedback....

Burning Amp BA-3b (Balanced)

but of course you have feedback in the system now.....
Thats a rabbit hole worth traveling, I think. Generg, you got PM.
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Old 6th October 2012, 07:34 PM   #2287
lhquam is offline lhquam  United States
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In post #2249 F6 Amplifier I said that I couldn't get a flat THD sweep without adjusting both the upper and lower Zen pots. I figured out reason: the upper pots were 100 ohm multi-turn potentiometers and the lower pots were 10 ohm Bourns multi-turn trimmers. It makes a big difference for the THD spectrum.

I now have 20 ohm single turn pots above and 10 ohm Bourns multi-turn trimmers below set exactly mid position. I have 10 ohm pots on order. Even though the pots are different, the results look good.

The upper pots are all that are needed to vary the THD from about 0.02% to 0.20% and the THD spectrum is quite flat. THD is minimum at mid position. H2 is compressive one way and expansive the other way.

For some reason, one channel is behaving as predicted by Spice, but the other channel is not behaving well. I have to carefully check the wiring and components. The R100s were fairly well matched, so I do not think their differences could explain the different THD spectra.
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Old 6th October 2012, 07:45 PM   #2288
Zen Mod is offline Zen Mod  Serbia
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we must be bloody careful ;

Papa had hernia surgery few years ago ( remember pijama picture , with Pirate flag and Jack) , due to overly enthusiastic big PL amp moving attempt (at least he declared that ) ......... so we don't want him having repeated hernia , this time induced with too much laughing .......

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Old 6th October 2012, 07:57 PM   #2289
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Quote:
Originally Posted by Zen Mod View Post
we must be bloody careful ;

Papa had hernia surgery few years ago ( remember pijama picture , with Pirate flag and Jack) , due to overly enthusiastic big PL amp moving attempt (at least he declared that ) ......... so we don't want him having repeated hernia , this time induced with too much laughing .......

Pls show this one of a kind picture. Laughter within reason is best medicine....
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Old 6th October 2012, 08:03 PM   #2290
Zen Mod is offline Zen Mod  Serbia
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hard task , but I have some luck

believe it or not , my Pass folder is 6,2GB big

(observe well ....... you'll see that Jack is having all the fun , in fact )
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