Search found 92 matches

by lietuvis
08 Jan 2024, 23:18
Forum: Electric Guitar/Bass Wiring
Topic: Mike Pope - Flexcore
Replies: 6
Views: 1270

Re: Mike Pope - Flexcore

Here you go, I think I ever did simulation in SPICE and mid frequencies correspond preamp specs.
by lietuvis
14 Apr 2023, 19:48
Forum: Boutique Stompboxes dissected...
Topic: Diamond Bass Comp
Replies: 68
Views: 49031

Re: Diamond Bass Comp

Please forgive my ignorance as I'm just learning EE in my free time. Did you all use 1/4W metal film resistors for most of the circuit? I saw on the Diamond website ( http://web.archive.org/web/20180731113024/http://www.diamondpedals.com/faq/ ) that the pedal is supposed to draw 20mA @ 18-24V which...
by lietuvis
01 Feb 2023, 22:11
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Yamaha NE1 pots orientation
Replies: 3
Views: 451

Re: Yamaha NE1 pots orientation

This is how original is wired in, the pot in the left:
Image
by lietuvis
13 Jun 2022, 18:52
Forum: Parts & Tools Sourcing & Trading
Topic: Searching for long-life, S-taper pots
Replies: 1
Views: 642

Re: Searching for long-life, S-taper pots

Hi, you might find hard time to find S taper potentiometer. However if you want for balance with centre detent you can use P260P series potentiometer with adding static resistor to each side between centre to side that will simulate S taper. I used this way for bass guitar as a pan (balance) after a...
by lietuvis
10 Sep 2021, 18:34
Forum: Electric Guitar/Bass Wiring
Topic: Ibanez Power Curve bass filter preamp
Replies: 5
Views: 2598

Re: Ibanez Power Curve bass filter preamp

Hard to say about every preamp made but little google find this couple images of power curve that reminds yamaha NE-1 schematic? https://www.talkbass.com/attachments/nus2f-jpg.674399/ https://www.talkbass.com/attachments/tlk30-jpg.674400/ https://lh3.googleusercontent.com/proxy/4nxGJ4Kq0vjCBMd4Z3HZ6...
by lietuvis
31 Jul 2021, 21:10
Forum: Printed/Published Online Designs
Topic: Fodera, Sadowsky, aguilar, and other bass preamps
Replies: 225
Views: 172411

Re: Fodera, Sadowsky, aguilar, and other bass preamps

Hi David, download yourself a LTSpice run midrange circuit from link at the below and have a play with values of resistors, capacitors, potentiometers and have your own calculator-simulator.
https://mega.nz/folder/0NgAFDoL#uYQUSBQ9f2HWW4R94PuO_A
by lietuvis
05 Mar 2021, 13:06
Forum: Printed/Published Online Designs
Topic: Fodera, Sadowsky, aguilar, and other bass preamps
Replies: 225
Views: 172411

Re: Fodera, Sadowsky, aguilar, and other bass preamps

Hi. After quite long lurking on web trying to find more information about Alembic bass onboard electronics I would say there is almost nothing regarding schematics or wiring diagrams. But what I could find is some pictures of onboard preamp filters. So I decide to try to trace the circuit from pictu...
by lietuvis
13 Oct 2019, 12:34
Forum: Boutique Stompboxes dissected...
Topic: Nordstrand - 3b preamp [traced]
Replies: 37
Views: 45055

Re: Nordstrand - 3b preamp [traced]

Here is my take on PCB 47mm X 26mm
NordstrandPCB.JPG
by lietuvis
23 Sep 2018, 09:28
Forum: Power
Topic: 9VDC to +15V -15V chargepump layout
Replies: 6
Views: 7644

Re: 9VDC to +15V -15V chargepump layout

Hello Thank you for your answer. That is indeed a solution to consider. Would you care to share a link ? (I think i didn't use the proper keywords, and my ebay search didn't give me accurate results...) https://www.ebay.co.uk/itm/15V-Dual-Output-DC-DC-Converter-Step-Up-Boost-Voltage-3-3V-5V-12V-to-...
by lietuvis
06 Jul 2018, 18:21
Forum: Pedal Debugging & Troubleshooting Support
Topic: Snow White Auto Wah
Replies: 12
Views: 2423

Re: Snow White Auto Wah

Decay pot doesn't work Hi, I have built 4 or 5 of SWAW circuits and yes at the beginning also noticed that DECAY is not responding as it should, but then after watching some videos of original pedal I noticed that decay is long when pot CCW and short CW and traced circuit stated that pot is C1M(rev...
by lietuvis
05 Mar 2018, 15:59
Forum: Pedal Debugging & Troubleshooting Support
Topic: EHX Bass Soul Food help
Replies: 4
Views: 2373

Re: EHX Bass Soul Food help

You can find schematic on web not for bass but should be very similar.
https://manticorefx.files.wordpress.com ... schem2.png
I would start from U3 and components around it.
by lietuvis
04 Mar 2018, 22:45
Forum: Pedal Debugging & Troubleshooting Support
Topic: EHX Bass Soul Food help
Replies: 4
Views: 2373

Re: EHX Bass Soul Food help

The diode D4 looks like a SMBJ10CA DO - 214 10 v two-way SMB transient suppression diode. But to me IC U3 and possibly resistor or cap on the right top corner doesn't look healthy, I might be wrong as not enough resolution on the picture.
by lietuvis
24 Nov 2017, 16:18
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JP-02 PowerSupply 2 [schematic]
Replies: 22
Views: 14345

Re: Joyo PowerSupply 2 schematic [schematic]

There are isolated DC-DC topologies that use transformers which are much smaller compared to the transformer in a standard AC supply. Could be that, or they are just as generous with the term isolated as Joyo. You can't isolate DC from DC via transformer. Transformers work only with ac. Since this ...
by lietuvis
16 Nov 2017, 12:10
Forum: Parts & Tools Sourcing & Trading
Topic: Compact 1/4" mono jacks, where to find?
Replies: 1
Views: 1972

Re: Compact 1/4" mono jacks, where to find?

Hi! I've searched till blue in the face, can anyone help be locate a source for those tiny compact 1/4" mono jacks? Enclosed prefered. Many thanks! - Dave something like this : http://smallbear-electronics.mybigcommerce.com/stereo-low-profile-pc-mount/ I use these and think they small enough: ...
by lietuvis
30 Oct 2017, 14:25
Forum: Printed/Published Online Designs
Topic: Fodera, Sadowsky, aguilar, and other bass preamps
Replies: 225
Views: 172411

Re: Fodera, Sadowsky, aguilar, and other bass preamps

Hi George, all my traced preamp component values were done not by me, check text file in dropbox link. And thanks to your newer schematic that helped me to sort little puzzle in also recent trace of this preamp PCB from picture found on web. Yes there is some resistor values not matching your schema...
by lietuvis
29 Oct 2017, 20:08
Forum: Printed/Published Online Designs
Topic: Fodera, Sadowsky, aguilar, and other bass preamps
Replies: 225
Views: 172411

Re: Fodera, Sadowsky, aguilar, and other bass preamps

Hello, here I have traced Ibanez onboard preamp with variable mids. I actually built this preamp for my washburn t24 bass and happy with it. Midrange has good Q and wide range 100hz-5kHz. The midrange circuit topology I see on moog lab series preamp. I never had original preamp and worked from pictu...
by lietuvis
25 Oct 2017, 13:42
Forum: Printed/Published Online Designs
Topic: Fodera, Sadowsky, aguilar, and other bass preamps
Replies: 225
Views: 172411

Re: Fodera, Sadowsky, aguilar, and other bass preamps

The 90's Ken Smith and Fodera basses also use the same Haz Labs circuit. The 3-band Ken Smith adds a mid control board that plugs into the other board. One thing to note is the Ken Smith uses a smaller bass cap. There's a few other minor variations you can see on the schematic. The new Ken Smith pr...
by lietuvis
20 Oct 2017, 18:04
Forum: DIY Projects
Topic: THAT4301 Compressor [schematic & layout]
Replies: 21
Views: 12734

Re: THAT4301 Compressor [schematic & layout]

great pcb design! Where did you buy the DC-DC converter? Do you have a link? link is in previous post, but here you are http://www.ebay.co.uk/itm/3W-DC-DC-Boost-Converter-3-3V-12V-to-15V-Output-Step-up-Power-Supply-Module-/222652335504?hash=item33d71d0590 3W DC-DC Boost Converter 3.3V-12V to ± 15V ...
by lietuvis
20 Oct 2017, 11:20
Forum: DIY Projects
Topic: THAT4301 Compressor [schematic & layout]
Replies: 21
Views: 12734

Re: THAT4301 Compressor [schematic & layout]

Wow do you sell some pcb? You can order pcb from https://oshpark.com (you can use zip file (I added) from dropbox link) . It's not that expensive for 3 of them ( $15.90 ). actually on my first order pcb I had error which is fixed in the files provided. Here is the link for dcdc: http://www.ebay.co....
by lietuvis
31 Aug 2017, 17:49
Forum: DIY Projects
Topic: THAT4301 Compressor [schematic & layout]
Replies: 21
Views: 12734

Re: THAT4301 Compressor [schematic & layout]

My latest build to 1590A using stock circuit and dual 15V DCDC inverter with input from 5V to13V, all resistors and some capacitors are at the bottom on PCB, added polarity protection fet BS250. Sprint Layout files for pcb: https://www.dropbox.com/sh/s9l2nr1kwqi6wt9/AAD-DwktyQt4ruzgMSlV4Hoza?dl=0 ht...