[BUILD] 1176 Rev A - Back to the beginning...

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thomasdf

Well-known member
Joined
Aug 10, 2011
Messages
484
Location
Paris, France
I am SO in love with my Hairball Rev A old version. It's just plain incredible and does something awesome to any vocals I run thru it.

So here's my question : if I want a pair of them, are there any circuit changes between the old and new kits ?
 

dribro

Well-known member
Joined
Jan 14, 2009
Messages
151
Location
Lisboa
hi.
cannot wrap my head around Igor's F76 LL1524 schematic and Rev.A output feedback. Maybe this traffo can't be used with Mnats 1.25 boards?
As i have a LL1524 pair, i might as well use them. They are so good.
As per Igors, primary + 12/7 and - 11/8; output +6/3 and 4/1 shunt. But then i have 5/2 not connected but i tested these are outs too.

any help is welcomed
 

Potato Cakes

Well-known member
Joined
Jul 1, 2014
Messages
1,886
Location
Nashville, TN
I am SO in love with my Hairball Rev A old version. It's just plain incredible and does something awesome to any vocals I run thru it.

So here's my question : if I want a pair of them, are there any circuit changes between the old and new kits ?
I've built the old ones and the new ones. The only difference I know of is the board layout, which makes it much easier to assemble and has an integrated option to add an active stereo linking option.

Thanks!

Paul
 

Poupignon

New member
Joined
Aug 2, 2021
Messages
1
Location
Paris
Hi everyone.
I just finished my 1176 rev D,
But the sound is completely distorted.
And the unit, more precisely, the transformer make a strange noise like whistling like a radio…
If someone can help me…
 

Ilya

Well-known member
Joined
Feb 25, 2005
Messages
558
Location
Moscow
Hi. This is Rev A thread, not Rev D.
As for your issue, this sounds like an oscillation in high frequencies. Check for proper wiring.
 

HerbertR

Active member
Joined
Mar 3, 2020
Messages
44
Location
Austria Voecklabruck
Hi, ve built a pair of Mnats 1176 A's and I measured wrong DC Voltages on the two JFets J309. Also my Output Level feeding with an 1kHz Sine is very low.
So I ve measured the 309J's and have recognised that they are BJTs and not JFETs!!! Original Aliex Fairchild Quality....😫.... Hell.... Five meteres before finishing the units...... I also made the expierence with BF245A's... Especially always with Fairchild brands... Cheap BJTs reprinted in China... I am such an Idiox....👿.... Sorry for my words....
 

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