Ceriatone Forum

Dear all,

I'd like to hear your comments to the following mods done on Michael W. Kliens 'Kleinulator'.

- bridged/removed the 33k input 'grit resistor on FET1
- removed the input 220p cap on FET1

- bridged the 100k input 'grid' resistor on FET2 with a 1.1n cap. = D'lator HP freq (1446 HZ)
- Added the LNF circuit, (10M+220n+10M) on FET2
- Changed the 1M input-to-ground resistor, on FET2, from to 220K

Using the Kelin i series, with a couple of pedals - a T-REX 'roommate' and T-REX 'replica'. I sounds nice and compresses nicely - even with the pedals off.

Settings
- both bright-switches off
- 'Mix' at 5 o'clock
- 'Send' at 12 0'clock
- 'Return' at 12 o'clock

Pedals adjustet to unity gain.

Since, I don't have a dumblator, it would be interesting if someone with both the klein and a d'lator clone, tried the mods on their clone and reported back about how the sounds compare. Due to the compression added by the mods, I have a feeling that its pretty close.

Erwin_we, Steven_nl? others?

that means soldering. I can't do it.

I do agree with Erwin that the Klein seems a bit "stiffer" and less trasparant then his Dumbleator. An experiment would be fun

I don't have a Dumleator, but I'd be willing to visit Erwin ofcourse.

No idea how much work this is?

Takes 5-10 min. tops

Count me in for the experiment...

Having just received my Kleinulator, I too would be interested in this comparison. Keep us posted!

+1
 ;)

I'm of on vacation friday (2 weeks). after that. If Erwin can do the soldeing. I can buy the parts.
Cheers
Steven

Hi bluesfendermanblues,

otherwise your mod appears very easy to experiment, but what is the "LNF circuit" like???

What do you mean?

What the LNF network sounds like? or what it consist of is?

Ouch,

what I mean is that when you build "LNF circuit on FET2", where and how these components (10M, 220n, 10M) are supposed to be 1) laid out 2) in relation to the FET2?

1) "phi" shape? T-shape? Something else?
2) On the grid side? Ground side? Ouput side?

I hope I'm not the only one who is wondering this... :-[

Ok, got you

I have done it as per the attached schemo  ;)

Many thanks for the schematics bluesfendermanblues!

Looking back, it shoud have been perfectly clear -  LNF = Local Negative Feedback.

I'm planning to build a Kleinulator during the Christmas break (your mods included). All this trouble only because of Roland SDE-3000 rack delay  ???

Great, that you can use the mods - all l really did was to make to Klein-ulator more like the original dumblator only in FET version. I don't  know why Klein left out the LNF and the extra caps that the real one have, but I find the with the mods the sound compresses nicely like the real one.

Nice that you are loyal to your old SDE, why change if it sounds good. I recommend running the Klien in parallel mode as opposed to serial mode like the original dumblator, in order not to degrade your signal through the SDE3000's old converters. Use it 100% wet and in parallelmode

To be honest, I've been using T.C. Nova Delay with my OTS for a long time, because it fits into the loop without any add-on boxes. The sound is OK, but it's  not very user friendly.

The SDE-3000 has a solid button for every function and despite it's age, it sounds terrific. Not to mention, it's also "period correct" with the early 80's -style OTS   ;)

I also have a Nova Delay, which I cant get to work in the OTS' loop without a kleinulator/Dumbleator. I sounds 'hollow' for lack of a better word direct in the loop. I have followed the input adjustment procedure as per the manual, but without much success.

However, with the Klein, it sounds nice an 2290'esh