[silent:arts]

« Last Edit: March 12, 2013, 01:11:00 PM by [silent:arts] »


kante1603

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #1 on: November 25, 2012, 12:00:07 PM »
Now why does that look familiar to me....... ;D

Udo.

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #2 on: November 25, 2012, 12:02:28 PM »
You might visit a german Forum or Fratzenbuch? ;D

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #3 on: November 25, 2012, 12:14:08 PM »
HOT!


3nity

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #4 on: November 25, 2012, 08:54:49 PM »
Is this hot like really cool or hot like transistors really got hot?? lol
Tell us a bit more about it.
Thanks
Life is a path, death the destination.

okgb

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #5 on: November 26, 2012, 11:39:47 AM »
 you Germans and your wacky K's ! Lean meat  ?  low fat ? pyramid power ?
I see xfmr goodness and allot of caps , hmmmm , curious drizzeled with fat ?
not copping pier's pre eh ?
GKB Audio / Greg Boboski

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #6 on: November 26, 2012, 06:18:59 PM »
Tell us a bit more about it.
Transformer balanced input and output (designed for the specific transformers, no options)
pure classA running on +/- 30V

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #7 on: November 26, 2012, 06:21:45 PM »
not copping pier's pre eh ?
not copping anything  8)

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #8 on: November 26, 2012, 07:27:47 PM »
not copping pier's pre eh ?
Greg, since I have been asked: what do you mean exactly?

okgb

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #9 on: November 26, 2012, 11:56:29 PM »

 Since I didn't know , I was referring to Pier's ma-1 germanium pre , because I couldn't see & your's
didn't seem to be a 2520 type as his was not , was trying to figure it out , just a little friendly kidding .
class A Iron goodness ?
GKB Audio / Greg Boboski


Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #10 on: November 27, 2012, 12:37:42 AM »
To tell you guys the truth...i haven't been able to get that chicken out of my mind for that last two days.
Mmm...looks like garlic hot sauce maybe? Anyway...i just picked up a family pack of thighs.

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #11 on: November 27, 2012, 12:48:20 AM »
let me guess... the red wire is the NFB feed from the nuclear reactor's gas turbines?  ;D
There's nothing like the right tool for the job.
And -usually- that's what I end up using...
..nothing like the right tool for the job!

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #12 on: November 29, 2012, 11:23:03 AM »
Schematic without component values.

We will limit this project to 60 / 30 PCBs (= 30 Stereo Sets)
PCBs will be ordered next week.

Darius made some listening tests, description in german only:
http://www.nrgrecording.de/nrg/viewtopic.php?t=2364&start=98
« Last Edit: November 29, 2012, 11:31:27 AM by [silent:arts] »

dmp

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #13 on: November 29, 2012, 01:09:40 PM »
Rg1 / Rg2 control the gain? What is the max gain?
FYI for others: there are some nice pictures on page 5 of the German forum.

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #14 on: November 30, 2012, 01:13:23 PM »
Rg1 / Rg2 control the gain? What is the max gain?
correct. the value table Darius calculated did either go from 20 to 64 dB, or 25 to 69 dB.
this was done for Pikatron a output transformers, we now decided to go for a Haufe which needs some adjustment. I'm sure Darius is already calculating  8)

dmp

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #15 on: November 30, 2012, 05:27:32 PM »
I see two MAT02s in the pictures... cool. Makes me think this might be like a 990 with class A throughout.  :)
Have you compared the Haufe to a Jensen 16b?

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #16 on: December 01, 2012, 10:49:38 AM »
Have you compared the Haufe to a Jensen 16b?

no. and to make support etc easier transformers are fixed (input = E-1420, output = RK494), no options.

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #17 on: December 18, 2012, 09:12:56 AM »
Preliminary documents (values may change):

K13117 Schematic
K13117 PCB


N13117 Schematic
N13117 PCB

One unit is on the road for listening tests to finalize some component values  8)

[silent:arts]

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #18 on: February 03, 2013, 08:07:37 AM »
some Pics of the first K13117 (copyright by Darius Kubarth)








strangeandbouncy

Re: [Teaser / Feeler] K13117 (ClassA MicPre by Darius Kubarth / Kubi)
« Reply #19 on: February 03, 2013, 02:27:51 PM »




 . . . I am not sure your gain knobs are big enough. . . .
. . . . RUH ROH . . . . .


 

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