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Old 4th July 2011, 08:58 PM   #21
generg is offline generg  Germany
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Sorry, Mr. Pass when the question was inadequate ........
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Old 4th July 2011, 09:05 PM   #22
generg is offline generg  Germany
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I bought two Lundahls 1674, connected primary and secondary windings to an autoformer and use them with a pair of modified F4.

The sound has not the charm of the Semisouth solutions concerning the voices but in the sum it is a very very good solution!
It is a detailed, yet relaxed sound with much atmosphere.....
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Old 11th October 2011, 03:30 PM   #23
generg is offline generg  Germany
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I followed Nelson recommendation to try different transformers...

This time I tried Jack Ellianos PVA2-N from his Electra Print...

He recommends it as a transformer pre with a 10k pot

Electra-Print.com PVA Passive Audio Pre-Amplifier

I put it the crippled F4 as a gain stage, wired it as an auto former and......

I like it much more than the Lundahl 1674.......

and it costs only the half .....! (Lundahls 200.-/ElectraPrint 120$)

So if you want to have a try I recommend you to start with Electra Print!
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Old 14th October 2011, 11:43 PM   #24
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Default B1 - trans/autoformer - F4?

As I was reading this thread, I could not stop wondering if positioning a trans/autoformer between a stock B1 and a stock F4 would give you a "B1 with gain" (or an "F4 with gain" depending on how you look at it)?

Would this work?
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Old 15th October 2011, 12:01 AM   #25
Zen Mod is offline Zen Mod  Serbia
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yeah
especially if you use F4 (side) without Jfet buffer
thread is exactly about something like that and it's mentioned already as "crippled F4"
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Old 15th October 2011, 02:35 AM   #26
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You mean liberated F4 don't you?

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Old 15th October 2011, 02:53 AM   #27
Zen Mod is offline Zen Mod  Serbia
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it can be liberated when you do this , but when ZM is in case ....... it can only be crippled .....

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Old 15th October 2011, 09:52 AM   #28
generg is offline generg  Germany
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ha, ha....

really two different points of view....!
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Old 15th October 2011, 09:54 AM   #29
generg is offline generg  Germany
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Quote:
Originally Posted by Zen Mod View Post
yeah
especially if you use F4 (side) without Jfet buffer
thread is exactly about something like that and it's mentioned already as "crippled F4"
or if you need a higher input impedance put it between the buffer and the output stage.... that should work at least with the bootstrapped F4....



and thanks to audiorob again...!
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Old 15th October 2011, 10:53 AM   #30
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Quote:
Originally Posted by generg View Post
ha, ha....

really two different points of view....!
there are just two groups here ;

one is Greedy Boyz group ;

other one is Papa group ;

considering that Papa group contains just one member , conclusion is simple - where Mighty ZM belongs .....

I call that some distinction ..... and that's why is there other one , regarding liberation and crippling
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