Klone Unity level issue

[DJPsychic]

Just completed my first Klone using the Sabro layout (https://www.sabrotone.com/klon-centaur-build-finished/)

I wired true bypass and omitted (numbers via original schematic) R3, R4, R26, R27, R28 & C2. I'm also using a MAX1044 instead of the 7660 as I was having noise/level issues.

After some trial and error I finally got working. It sounds nice but I think my unity level is a bit low. On a lower-mid gain setting the VOL is turned to 1-2 O'clock to reach unity.

Other Klones I have, unity is reached much earlier (around 9 o'clock).

I also notice I'm not getting the same fullness/magical harmonics from other Klones I have. May have to try some other diodes. I'm using NOS single black band 1n34as

Any suggestions are greatly appreciated

[ElectricDruid]

Sounds to me like there's something wrong still. Not something critical, but perhaps a wrong value somewhere, giving you not enough gain and therefore not enough level or harmonics.

Keep hunting?

Or post some voltages/pictures and let us lot take a look. You never know, someone might spot something. Fresh eyes helps.

[DJPsychic]

Hey Druid,

Not sure photos will help, it's a bit messy. I'll go through everything again today and match it against the layout. Voltages seem good as well.

IC1
1: 4.56   
2: 4.56   
3: 3.9     
4: 0 
5: 4.7
6: 4.5
7: 4.6
8: 9

IC2
1: 4.4
2: 4.3
3: 4.4
4: -8
5: 4.2
6: 4.4
7: 4.3
8: 15.6

IC3
1: 9
2: 4.5
3: 0
4: -4.2
5: -8.4
6: 3.4
7: 6.14
8: 9     

[DJPsychic]

Yay figured it out.

I had the wrong value in the Sabro R25 (560R).

Also had a gain wire in the wrong hole on board.

All good now!

Comparing it to an AF2 (aluminum Falcon) that I have, it's very very close. Mine is slightly thinner/brighter than the AF2. The AF2's mids are slightly smoother/Warmer, fuller lower end. I imagine this is where diode selection play a role. May try swapping the 3.9nf with a 6.8

Any pointers always welcome

Thank you!

[DJPsychic]

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