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Old 27th March 2010, 08:08 PM   #121
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by generg View Post
....
very good! really still better than F4 in many aspects, but less dynamics! (hi ZenMod)

.....
someone called a




main differences - in sound - between F4 and B1 bias+output stage are result of dofferences in concept ; while F4 is plain ( ) follower ....... jumping freely up and down , without real knowledge and difference in what is up and what is down ........ B1 is nothing else than SE buffer .

so - sound is probably sweetened with B1 , while with F4 is more clinic ..... decent , real , precise ..... choose your own term here .

further mumbojumbo from Mighty ZM - say that is somewhat sweetened SUSY preamp ( not precise and brutal as full monty 4 quadrant symmetric UGS jobbie ) , tnx to SE outputs and just one LTP in core .... in same time F4 (without input buffer) is as full UGS preamp comparing to

taking care in evaluation and comparison that every competitor have same PSU quality ...... so - do not compare and UGS without using Shunty in both cases ;

do not compare B1 vs. F4 with different PSUs
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Old 27th March 2010, 09:03 PM   #122
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Generg,
Are you going to put in BA-1 front end, or use pumpie?
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Old 27th March 2010, 09:21 PM   #123
generg is offline generg  Germany
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Quote:
Originally Posted by Tea-Bag View Post
Generg,
Are you going to put in BA-1 front end, or use pumpie?
I am still in favour of pumpkin. But with BA-1 which is a little more sweeter than F4 as ZenMod says the BA-1 front end could be the better choice look here:
Burning Amplifier BA-2

Of course I will also try BA-2! In all combinations and when I have chosen my favorite combination Nelson will come
-with a new front-end and
-an BA-1 with more power,
-J2 will be published ...
ZenMod will offer new parts and modifications ...........
I am a lucky man, in summer I will retire and have all time to build all these cool things
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Old 27th March 2010, 09:25 PM   #124
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you forgot to count on possibility that ZM will finally find holly grail .....

P "channel" Tube

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Old 27th March 2010, 09:39 PM   #125
generg is offline generg  Germany
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ha, ha ZenMod "P channel tube" that sounds really good and I will look for my old OC 71 to build an SE output!

thanks for your comments, I don´t understand this part:

".... in same time F4 (without input buffer) is as full UGS preamp comparing to pumpkin"

would you suppose BA-2 is very similar to F4?

Do you understand why BA-2 has only one capacitor c101 to the gates of output devices, while F4 needs two?
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Old 27th March 2010, 09:57 PM   #126
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Quote:
Originally Posted by generg View Post
......
thanks for your comments, I don´t understand this part:

".... in same time F4 (without input buffer) is as full UGS preamp comparing to pumpkin"

hahaha ..... I forgot end of sentence ... or exact meaning of it .......... so - it must be something as :
you can use same logic (regarding euphony in sound ) comparing UGS vs. and F4 vs.B1 output stage ; just look which ones are SE and you'll know

Quote:
Originally Posted by generg View Post
......
....

would you suppose BA-2 is very similar to F4?
......
bingo !

( if you means on output stage only

Quote:
Originally Posted by generg View Post
......
....
....

Do you understand why BA-2 has only one capacitor c101 to the gates of output devices, while F4 needs two?

tip :

Papa is teasing ya , intentionally or not ;

naah ..... with just little more thinking - Papa is teasing us ..... always

just look at C203 , page 4 of article Burning Amplifier BA-2

it's same in function as in F4 output stage , even if position is slightly changed
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Old 27th March 2010, 10:41 PM   #127
generg is offline generg  Germany
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o.k. C203 is the missed candidate. I was looking for two similar values like in F4 2 x 220 microfarad.

So Nelson diminished one value to 10 micro (better quality polypropylen) and increased the other one to 1000 micro to avoid the plop when starting the amplifier.

which type of the coupling capacitor do you use for your F4?

black Serbian oil and blood capacitor?

have a good night!
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Old 27th March 2010, 11:32 PM   #128
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my F4 is long ago dismantled back to drawer ..... or is it still on heatsink .... dunno ;

it amuses me for about a week

presently , I don't have any Papa's amp in my possession or use .

I don't even have a or Babelfish J

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Old 28th March 2010, 08:56 AM   #129
generg is offline generg  Germany
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incredible, really ..........

poor serbian man........

.......I suppose you hear Accuphase, Krell, Sony

I don´t dare to ask you what you are hearing.... in the moment.....
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Old 28th March 2010, 09:12 AM   #130
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by generg View Post
....

.......I suppose you hear Accuphase, Krell, Sony
.....

I did - overengineered for my liking . even KSA50 is a bit too complex ...... and I don't need that power

Quote:
Originally Posted by generg View Post
....

...

I don´t dare to ask you what you are hearing.... in the moment.....

whatever I trow on my 16R speakers , they sing

I'm more in researching possibilities with olde speaks lately ; last find is pair of Lorenz LP312
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