Search found 152 matches

by Nikifena
06 Nov 2013, 22:35
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Mesa Boogie - Throttle Box [schematic]
Replies: 94
Views: 112909

Re: Mesa Boogie Throttle Box schematics [schematic]

There is something strange (or not complete) in the schematics around C19 First leaving one of the C19 pins unconnected this will makes some pops, so a high value resistor to ground must be added. Second Mesa adds SW1B switch there to decrease the the gain (drive) from stage around IC1A. With this t...
by Nikifena
04 Jun 2013, 22:37
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Korg - Pitchblack Tuner
Replies: 25
Views: 9826

Re: KORG Pitchblack tuner

It's normal in some situarion to hear some pops with true bypass pedals. To fix this just add two 10meg resistors from the input to ground and from the output to ground to prevent some voltage potentials from otside.
I have the same tuner. It's my favourite one. I will neve change it :)
by Nikifena
22 Jun 2012, 16:58
Forum: Boutique Stompboxes dissected...
Topic: E.W.S Tri-Logic II Bass Preamp [traced]
Replies: 202
Views: 88214

Re: E.W.S Tri-Logic II Bass Preamp [traced]

A month ago I get one xotic fretless bas for repair. This bass has the same PCB like this one. Just for fun I trace it. The schematics is the same. Here is the missing parts based on the last schematics: The feedback resistor between the gate and drain is 10Meg The resistor in the opamps feedback wi...
by Nikifena
21 Jan 2012, 12:58
Forum: Stuff Seen for Sale
Topic: N-audio website
Replies: 9
Views: 4469

Re: N-audio website

^Thanks! All enclosures are custom made. I use 3d software to make them. Then local company cut the metal sheet, bended it, another company paint my enclosures with powdercoating and another one makes my silkscreen labels. I'm a big Freak Kitchen fan. My logo was inspired from their cow. This is the...
by Nikifena
20 Jan 2012, 16:37
Forum: Stuff Seen for Sale
Topic: N-audio website
Replies: 9
Views: 4469

Re: N-audio website

Thanks guys.
There are few typical colors - green, red, blue, black and white. Because the overall tube preamp will be white, I think about the color of the pcb's and I use white gold plated pcb's .
by Nikifena
20 Jan 2012, 07:26
Forum: Stuff Seen for Sale
Topic: N-audio website
Replies: 9
Views: 4469

Re: N-audio website

Adding middle in this configuration will be compromise. To make 3 band EQ stage - bass, treble and middle with big Q factor, I need another tube stage. A total of 3 tubes I can get more than 3 band EQ preamp for bass. My goal is small tube box for bass. Not tube preamp. Bass ant treble controls here...
by Nikifena
19 Jan 2012, 07:29
Forum: Stuff Seen for Sale
Topic: N-audio website
Replies: 9
Views: 4469

Re: N-audio website

Thank you! On the Firesound V3 demos you can see 2 of the best guitar players from Bulgaria. They have a lot of demos in their youtube channels. I'm bass player and I can't play so good on guitar hehee. Also I need a good presentation from professional guitar players. I start a tube bass preamp-Di b...
by Nikifena
18 Jan 2012, 21:44
Forum: Stuff Seen for Sale
Topic: N-audio website
Replies: 9
Views: 4469

N-audio website

Hi, guys. Finally N-audio has a website :) N-audio Custom Guitar Electronics | Handbuilt boutique pedals and custom stuff A few words: My name is Nikolay and I am from Bulgaria. Engineer and bass player with more than 10 years experience in band playing. I have equally long experience in making vari...
by Nikifena
01 Sep 2011, 12:02
Forum: Amplifiers
Topic: Free download Vacuum Tube Design Book
Replies: 16
Views: 9777

Re: Free download Vacuum Tube Design Book

From here you can download this book include xls file:
http://ixian.ca/gallery/thumbnails.php?album=38
by Nikifena
02 Apr 2011, 20:27
Forum: Davidoff Library
Topic: Grounding and Shielding: Circuits and Interference
Replies: 4
Views: 4685

Re: Grounding and Shielding: Circuits and Interference

Dave Davenport’s article about grounding and shielding for audio stuff. Great information! Must read!

http://www.raleighaudio.com/Audio%20Com ... ection.pdf
by Nikifena
16 Mar 2011, 23:42
Forum: DIY Projects
Topic: Paul Cochrane - Fat Bastard [documentation]
Replies: 44
Views: 26847

Re: Paul Cochrane - Fat Bastard [documentation]

Actually, this is my vision of electronics. For me this is better. There are nothing dangerous. Just a point of view. Almost any pedal, effect, or electric guitar device have input and output reaction with the "world". If we speak for guitar pedals, best choice is high input impedance and ...
by Nikifena
16 Mar 2011, 19:35
Forum: DIY Projects
Topic: Paul Cochrane - Fat Bastard [documentation]
Replies: 44
Views: 26847

Re: Paul Cochrane - Fat Bastard [documentation]

Less than 1K and doesn't depend by volume pot position.
It's always better to have smaller output resistance of any effect.
by Nikifena
14 Mar 2011, 21:59
Forum: DIY Projects
Topic: Paul Cochrane - Fat Bastard [documentation]
Replies: 44
Views: 26847

Re: Paul Cochrane - Fat Bastard [documentation]

I think that this is better

I put smaller input resistor, change protection with schottky diodie. Now we loose 0.2-0.3V, but the diode can't blow ;)

Now we have lower output resistance ;)
by Nikifena
12 Jan 2011, 13:08
Forum: DIY Projects
Topic: Mosfet booster
Replies: 16
Views: 3681

Re: Mosfet booster

EDIT: Reverse D3 pins!
Sorry for the error. No one see this :oops:
I check the schematics today and see the error. Sorry again.
by Nikifena
27 Nov 2010, 13:40
Forum: Davidoff Library
Topic: Fundamentals of Analog Circuits
Replies: 6
Views: 3840

Re: Fundamentals of Analog Circuits

Hi, guys. Try to find the book in other sitez over the net. I can't remeber the proper link for download, but the book is good.

The other good book is signal audio from Douglas Self. Someone was post the link here in this forum.
by Nikifena
25 Nov 2010, 07:52
Forum: Davidoff Library
Topic: Penfold - Practical Electronic Musical Effects Units
Replies: 15
Views: 26182

Penfold - Practical Electronic Musical Effects Units

Another stompbox book found over the net.
practical-electronic-musical-effects-units contents.jpg
by Nikifena
13 Oct 2010, 19:20
Forum: DIY Projects
Topic: Another brother of V30 speaker simulator
Replies: 16
Views: 5720

Re: Another brother of V30 speaker simulator

Sorry, KMG :oops: . I think, that this is input. In this case, this idea is useless ;)