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Old 14th September 2011, 12:19 AM   #41
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Read the article again and found no explanation of the sound. Reminded me of another one his writings where he stated how he had grown tired of saying how it sounds. Looks like Generg will be the first to tell. I have a feeling it will be good. THank goodness i have two sets of F4 boards sitting around. Drop those nasty input pairs and we have the beginnings of something real NICE. Guess i will have to compare it to Juma's F5 and the Aleph J of course.
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Old 14th September 2011, 01:04 AM   #42
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It sounds really good.



especially if you use the parts specified.
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Old 14th September 2011, 01:12 AM   #43
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It just so happens that I stumbled upon some recently. I thought you might be coming with an SRPP VAS, as they apparently do well with large loads Like the F4. Or was it the Mu follower. TOO many amps floating around in my head What is the input impedance of the output stage?
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Old 14th September 2011, 01:20 AM   #44
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Quote:
Originally Posted by Nelson Pass View Post
It sounds really good.



especially if you use the parts specified.
perhaps this is a good reason to use my last 6x68.000uF caps
can try both BA-2 and BA-3 front ends on thesame amp
sounds like a nice deal
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Old 14th September 2011, 02:24 AM   #45
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Quote:
Originally Posted by Michael Rothacher View Post
I ordered my boards already.
Great service here! Thank you very much! (I hope the German customs won't let me wait once again for 3 months, before they decide to release them.)

Quote:
Originally Posted by Nelson Pass View Post
It sounds really good.



especially if you use the parts specified.
Of course it will! Thank you so much for sharing this gem! I guess it will perfectly drive the SemiSouth output stage circuit that's circulating here?
Interesting "Pass"-Clarity Caps populating the board. What's the story of them?
Actually the "MR" Clarity Cap is my favorite (high pass) crossover cap at the moment. I use them in my Thor Evos. They are expensive, but really excellent!
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Old 14th September 2011, 04:37 AM   #46
generg is offline generg  Germany
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Besides the stinking name, , Darmstadt has wonderful woods indeed.......

@ tea-bag: I think some of the 30db gain is lost in R13, as Nelson writes.
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Old 14th September 2011, 07:44 AM   #47
generg is offline generg  Germany
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minor problem forgot R8/9 first

first module adjusted......
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Old 14th September 2011, 08:34 AM   #48
sts9 is offline sts9  Poland
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Can I use BA-3 as a preamp for Zen v9?
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Old 14th September 2011, 09:19 AM   #49
Variac is offline Variac  United States
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The idea was to have the boards ready for you in the diyAudio store when the article came out! And they ARE ready to ship!
http://www.diyaudio.com/store/
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Old 14th September 2011, 10:40 AM   #50
generg is offline generg  Germany
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o.k.

another problem using the F5 boards, this boards leads the gate resistor directly to the caps and you hear nothing..........!

Even when the DC values are correct, Ac is fed to the rails, ha,ha

so I can only recommend to use the original boards.....

I tried to make no faults but I made three......


to a first sound check:

one channel Babelfish J2,
the other channel crippled F4 and BA-3

speakers Tiny Open Baffle from Jons idea

playing Ella Fitzgerald monaural recordings ......so charming...nevertheless which amp!

Semisouth solution has as always its own charm, sounding a bit darker and giving voices bit more body

BA-3 and F4 combined has more precision in sound for example piano, and sounds very relaxed and natural .....

buy the boards.........!
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