Guitar Effects http://blackmarketsunday.com/guitareffects.cfm Fri, 18 May 2012 19:57:52 GMT http://bandzoogle.com Random Archives http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=2091572 View a <a href="www.muzique.com/news/?random=1" title="random blog post">Random Post from the blog archives. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors. View a Random Post from the blog archives.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Fri, 18 May 2012 19:57:52 GMT 040256064A28DF9BCB897A017FEAC49F The Boat Anchor Manual Archive http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=2084066 <a href="http://bama.edebris.com/manuals/" title="The Boat Anchor Manual Archive" target="_blank">The Boat Anchor Manual Archive Nothing to do with boats &nbsp; The Boat Anchor Manual Archive is a vast collection of manuals for electronics devices and other manuals from years gone by&#8230; all free to download! Of particular interest to me was the <a href="http://bama.edebris.com/download/tubesandvalves/rca-hb3-1952/Semiconductors.pdf">1952 RCA Semiconductor manual, where the 2N33 germanium transistor was listed for $23.00, which is $199.70 in 2012 dollars!!! The 1N34a Ge diode is $2.00, which is $17.36 in 2012 currency. Check it out! <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors. The Boat Anchor Manual Archive

Nothing to do with boats   Smiley

The Boat Anchor Manual Archive is a vast collection of manuals for electronics devices and other manuals from years gone by… all free to download!

Of particular interest to me was the 1952 RCA Semiconductor manual, where the 2N33 germanium transistor was listed for $23.00, which is $199.70 in 2012 dollars!!!

The 1N34a Ge diode is $2.00, which is $17.36 in 2012 currency.

Check it out!

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Wed, 16 May 2012 18:45:40 GMT CBD4109808096E1D56CD5BF0CC4ECEF1 SSM2166 update http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=2080153 The radical new design of the 2166 compressor proved to be too difficult to get to work 100%, even though I have tried numerous mods to make it succeed. It should work (according to the datasheet) and it does work most of the time. However, some extreme settings of the controls would send it into weird oscillations. Therefore, I&#8217;m scrapping this design and will make a pcb run of the more conventional Q&#038;D version that has long been on the web site (though updated slightly). <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
SSM2166 compressor

The radical new design of the 2166 compressor proved to be too difficult to get to work 100%, even though I have tried numerous mods to make it succeed. It should work (according to the datasheet) and it does work most of the time. However, some extreme settings of the controls would send it into weird oscillations. Therefore, I’m scrapping this design and will make a pcb run of the more conventional Q&D version that has long been on the web site (though updated slightly).

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Tue, 15 May 2012 18:57:05 GMT 1621FBF2AEB2003BDD44DFC989769F04 Bypass Systems Measured http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1971953 I tested the signal level and frequency response of a short chain of true bypass pedals against the same number of buffered Boss pedals. See the full article in my <a href="http://www.muzique.com/lab/main.htm" title="AMZ Lab Notebook">Lab Notebook. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
jfet bypass response

I tested the signal level and frequency response of a short chain of true bypass pedals against the same number of buffered Boss pedals. See the full article in my Lab Notebook.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Thu, 12 Apr 2012 09:24:23 GMT A44F7ECDC948CF34C8F0F997217A2B51 Guitar & Bass magazine http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1970649 The May 2012 issue of Guitar &#038; Bass magazine has a full page dedicated to my <a href="http://www.muzique.com/lab/pickups.htm" title="pickup simulator">Pickup Simulator. The author describes the simulator circuit as having a &#8220;subtle but undeniably beneficial influence&#8221;. Pick up a copy of the May 2012 issue of Guitar &#038; Bass magazine and flip to page 109 for the full article! The May 2012 issue of Guitar & Bass magazine has a full page dedicated to my Pickup Simulator. The author describes the simulator circuit as having a “subtle but undeniably beneficial influence”.

Pick up a copy of the May 2012 issue of Guitar & Bass magazine and flip to page 109 for the full article!

]]> Thu, 12 Apr 2012 01:21:24 GMT D56EDD28D7536936EFBE6AD741D551AE Mini-Booster Frequency Response http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1964078 <a href="http://www.muzique.com/news/images2/mini-RTA.jpg"> I recently bought the TrueRTA software to use for measurements of audio circuits, and after installing and calibrating the setup with the laptop in my lab, I plugged in the Mini-Booster to see how it performed. The results were that the circuit is flat for most of the range with a high frequency droop of about 0.25db at 20KHz. The low end also sags somewhat and is down slightly over 0.30db at 82Hz (low E on a guitar) and about -1.25db at 41Hz (low E on the bass guitar). This is excellent response for guitar use and more than good enough for bass. The low end -3db corner frequency is about 25Hz. These measurements were made with a stock mini-booster circuit built on the <a href="http://www.muzique.com/pcb.htm" title="DIY AMZ pc boards for guitar effects">pcb that I sell for the circuit. J201 transistors are used in this pedal and it is capable of about 35db of gain. Once I get some more practice using the software, I will test the Mosfet Boost and some other transistor and opamp circuits. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors. Mini-Booster frequency response

I recently bought the TrueRTA software to use for measurements of audio circuits, and after installing and calibrating the setup with the laptop in my lab, I plugged in the Mini-Booster to see how it performed.

The results were that the circuit is flat for most of the range with a high frequency droop of about 0.25db at 20KHz. The low end also sags somewhat and is down slightly over 0.30db at 82Hz (low E on a guitar) and about -1.25db at 41Hz (low E on the bass guitar). This is excellent response for guitar use and more than good enough for bass. The low end -3db corner frequency is about 25Hz.

These measurements were made with a stock mini-booster circuit built on the pcb that I sell for the circuit. J201 transistors are used in this pedal and it is capable of about 35db of gain.

Once I get some more practice using the software, I will test the Mosfet Boost and some other transistor and opamp circuits.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Tue, 10 Apr 2012 11:07:39 GMT 461F2B43D1766165A5C41EE89DBA3196 Amplifier maker Jim Marshall dies at 88 http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1950361 Rest in Peace. <a href="http://latimesblogs.latimes.com/music_blog/2012/04/marshall-amplification-jim-marshall-dies.html" title="Jim Marshall dies at age 88" target="_blank">http://latimesblogs.latimes.com/music_blog/2012/04/marshall-amplification-jim-marshall-dies.html <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors. Rest in Peace.

http://latimesblogs.latimes.com/music_blog/2012/04/marshall-amplification-jim-marshall-dies.html

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Thu, 05 Apr 2012 21:14:17 GMT F654A838CB7FDD4C29648BAE6109A13C Electronics Magazine Memories http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1950362 I actually have one of the ancient magazines (IC circuits) that Dave shows in this video. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

I actually have one of the ancient magazines (IC circuits) that Dave shows in this video.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Thu, 05 Apr 2012 21:10:11 GMT 42D72E5B8C7C2ADE01302D95FD43BD54 Basic Breadboarding http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1945168 Basic breadboarding with Jessica Uelmen, Engineering Manager from Parallax. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

Basic breadboarding with Jessica Uelmen, Engineering Manager from Parallax.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Wed, 04 Apr 2012 15:14:36 GMT DF61432F14FD135F5C137728CD17F2DB Relay Bypass Updates http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1945169 I have added instructions on the relay bypass support page on how to control multiple bypasses with a single momentary switch. You can even toggle between two circuits with one switch. The code in the micro has been revised to add a little tolerance to support multiple switches. The support page is available to everyone who purchases the AMZ relay bypass. Also I have had a report of problems with a boards not wanting to switch and this was traced to cheap relays bought from surplus outlets, which do not meet the minimum standards on the relay datasheet. The code in the microprocessor has been updated to make sure that even out-of-spec relays will switch reliably. If you have problems with a relay not wanting to switch, return your micro to me and I&#8217;ll rewrite its code with the latest version. Lastly, if you play with the relay and micro on a breadboard, be aware that the added capacitance of some breadboards can impact the reliability of the switching. My breadboards work fine for testing but one user has had problems with his. Once he installed the parts on the pcb, everything worked as designed. Just FYI. The latest code revision may help with this too. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
Tweed Stack bypass

I have added instructions on the relay bypass support page on how to control multiple bypasses with a single momentary switch. You can even toggle between two circuits with one switch.

The code in the micro has been revised to add a little tolerance to support multiple switches. The support page is available to everyone who purchases the AMZ relay bypass.

Also I have had a report of problems with a boards not wanting to switch and this was traced to cheap relays bought from surplus outlets, which do not meet the minimum standards on the relay datasheet. The code in the microprocessor has been updated to make sure that even out-of-spec relays will switch reliably. If you have problems with a relay not wanting to switch, return your micro to me and I’ll rewrite its code with the latest version.

Lastly, if you play with the relay and micro on a breadboard, be aware that the added capacitance of some breadboards can impact the reliability of the switching. My breadboards work fine for testing but one user has had problems with his. Once he installed the parts on the pcb, everything worked as designed. Just FYI. The latest code revision may help with this too.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Wed, 04 Apr 2012 15:00:43 GMT 83799DFF6DC69952C497B07A05D1E339 Relay Bypass Revised http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1848745 The relay bypass is back in stock and I made a couple of changes to the design before reordering the boards. It now has a jumper that allows you to select whether the bypass powers up with the effect either on or off. Previously it always started with the effect off, but now you have a choice of how to build it. I also have a limited number of soft touch momentary switches available for purchase with this project. <a title="AMZ PC Boards" href="http://www.muzique.com/pcb.htm#byp">Order the AMZ Relay Bypass. Parts Kit now available <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
true bypass relay
The relay bypass is back in stock and I made a couple of changes to the design before reordering the boards. It now has a jumper that allows you to select whether the bypass powers up with the effect either on or off. Previously it always started with the effect off, but now you have a choice of how to build it. I also have a limited number of soft touch momentary switches available for purchase with this project.

Order the AMZ Relay Bypass.

Parts Kit now available

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Fri, 16 Mar 2012 00:57:54 GMT 47E4B0E166283B8220BBD8EDEF4A3E39 Digikey's Free Online Schematic Program http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1868239 Digikey&#8217;s Scheme-It is an online schematic drawing tool, that&#8217;s freefor users to design and draw circuit diagrams: <a href="http://www.digikey.com/us/en/mkt/scheme-it.html" title="Digikey's Scheme-It" target="_blank">http://www.digikey.com/us/en/mkt/scheme-it.html <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
Digikey

Digikey’s Scheme-It is an online schematic drawing tool, that’s free
for users to design and draw circuit diagrams:

http://www.digikey.com/us/en/mkt/scheme-it.html

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Wed, 14 Mar 2012 00:05:55 GMT 0871433A7A21072D778281C9298B181D AMZ Tweed Stack http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1860920 The AMZ Tweed Stack is a revised and improved version of the <a href="http://www.muzique.com/tech/AMZ_Booster2.gif">Dual Mini-Booster and <a href="http://www.muzique.com/tech/Booster25.jpg">Booster 2.5 designs from the late 1990s. It uses four jfet transistors in a high gain configuartion to provide a smooth overdrive tone like a vintage stack driven to its limits. <a href="http://www.muzique.com/tech/tweed.htm">Read more about this project. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
Tweed stack pcb

The AMZ Tweed Stack is a revised and improved version of the Dual Mini-Booster and Booster 2.5 designs from the late 1990s. It uses four jfet transistors in a high gain configuartion to provide a smooth overdrive tone like a vintage stack driven to its limits.

Read more about this project.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Sun, 11 Mar 2012 20:38:57 GMT B508F3959DF517F464E6496C42F097A7 CircuitLab online simulator http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1824803 <a href="http://www.muzique.com/news/images2/lab1.jpg" title="lpb1 sim larger image" target="_blank"> Circuitlab has an online simulator that is easy to use and plenty powerful enough for many guitar effects circuits. I created the LPB1 circuit as shown above, and made it public for you to try out. You can click on any of the images in this post for larger views of the screen captures. There is nothing to download, and the program is very easy to use. Simulations allow you to check the DCbias, the Frequency Response and a Time Domain view (like an o-scope) as shown below. Check it out at https://www.circuitlab.com/ <a href="http://www.muzique.com/news/images2/lab3.jpg" title="lpb1 sim larger image" target="_blank"> <a href="http://www.muzique.com/news/images2/lab5.jpg" title="lpb1 sim larger image" target="_blank"> <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
lpb1 sim

Circuitlab has an online simulator that is easy to use and plenty powerful enough for many guitar effects circuits. I created the LPB1 circuit as shown above, and made it public for you to try out.

You can click on any of the images in this post for larger views of the screen captures.

There is nothing to download, and the program is very easy to use. Simulations allow you to check the DCbias, the Frequency Response and a Time Domain view (like an o-scope) as shown below.

Check it out at https://www.circuitlab.com/

lpb1 sim

lpb1 sim

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Wed, 29 Feb 2012 23:04:14 GMT 54763AE93FBA14467EF64B979C878A7C Updated Firefox Button http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1752428 I have updated the AMZ button to work with Firefox version 10. It adds a small icon on your Firefox toolbar that will take you directly to the AMZ Guitar FX blog. I&#8217;ve tested it with several versions of Firefox, but you should be updated to the latest version for security purposes anyway. Just install the button by clicking the link below, and then restart Firefox once it has been installed. You may need to position the icon on the toolbar when Firefox restarts. This is done by going to the Firefox menu selection of View/Toolbars/Customize. Find the AMZ-FX icon and drag it onto the toolbar in the position you want it to occupy&#8230; for example, next to the Home icon or down past the end of the location entry bar. Enjoy! <a title="AMZ Toolbar Icon" href="http://www.muzique.com/news/Muzique_toolbar.xpi" target="_self">AMZ Firefox Tool AMZ toolbar icon I have updated the AMZ button to work with Firefox version 10. It adds a small icon on your Firefox toolbar that will take you directly to the AMZ Guitar FX blog. I’ve tested it with several versions of Firefox, but you should be updated to the latest version for security purposes anyway.

Just install the button by clicking the link below, and then restart Firefox once it has been installed. You may need to position the icon on the toolbar when Firefox restarts. This is done by going to the Firefox menu selection of View/Toolbars/Customize. Find the AMZ-FX icon and drag it onto the toolbar in the position you want it to occupy… for example, next to the Home icon or down past the end of the location entry bar. Enjoy!

AMZ Firefox Tool

]]> Wed, 01 Feb 2012 03:49:26 GMT C976B822D8270F14B55371999485A285 New Pedal Boxes? http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1747872 <a href="http://www.muzique.com/news/images2/boxes1.jpg"> Arrived in the mail today. Are these Hammond boxes new? <a href="http://www.muzique.com/news/images2/boxes3.jpg"> I ran across them while doing a search for 1590s on Mouser and thought they looked like they were made specifically for pedal builders. Maybe Hammond is trying to tap into a growing market. The one on the left is a 1590TRPB and is a trapezoid shape; wider at the top than the bottom. This would be a nice enclosure for a booster. The octagon box is a 1590STPC, and I&#8217;m thinking a fuzz face type circuit would be perfect for this one. The jacks would fit nicely on the angled corners at the top. Click on either of the pix for a larger view. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
new Hammond boxes

Arrived in the mail today. Are these Hammond boxes new?

new Hammond boxes

I ran across them while doing a search for 1590s on Mouser and thought they looked like they were made specifically for pedal builders. Maybe Hammond is trying to tap into a growing market.

The one on the left is a 1590TRPB and is a trapezoid shape; wider at the top than the bottom. This would be a nice enclosure for a booster.

The octagon box is a 1590STPC, and I’m thinking a fuzz face type circuit would be perfect for this one. The jacks would fit nicely on the angled corners at the top.

Click on either of the pix for a larger view.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Sun, 29 Jan 2012 03:46:53 GMT B1DC3823D98FC734B269CEC9E44FE767 Microprocessor and Relay Bypass Box http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1717865 Here is a prototype of my ATtiny development board, and a printout of a bypass pcb that can control 4 pedals. The microprocessor board is a generic pcb that I developed for general use with the 20-pin ATtiny AVR microprocessors. It is multi-purpose but when I received the prototypes, I realized that it could be used to control 4 relays to make a 4 pedal true bypass switching box. All that would be required would be a pcb with the 4 relays on it, and the print in the background is the first pass at the design. I should have some prototypes of the relay board soon. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
ATTiny2313 pcb

Here is a prototype of my ATtiny development board, and a printout of a bypass pcb that can control 4 pedals.

The microprocessor board is a generic pcb that I developed for general use with the 20-pin ATtiny AVR microprocessors. It is multi-purpose but when I received the prototypes, I realized that it could be used to control 4 relays to make a 4 pedal true bypass switching box. All that would be required would be a pcb with the 4 relays on it, and the print in the background is the first pass at the design. I should have some prototypes of the relay board soon.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Sun, 15 Jan 2012 20:38:06 GMT B156E9B63C1ECEC77EB2D2D2A9E714BF Vintage Fuzz http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1679228 If you like vintage electronics magazines, there are scans of some quite old issues of Practical Electronics in the <a href="http://www.archive.org/search.php?query=practical%20electronics%20AND%20mediatype%3Atexts" title="Practical Electronics">Internet Archive. The fuzz schematic above came from the November 1967 issue. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
fuzz schematic

If you like vintage electronics magazines, there are scans of some quite old issues of Practical Electronics in the Internet Archive.

The fuzz schematic above came from the November 1967 issue.

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Wed, 04 Jan 2012 04:17:59 GMT 6C28970BEAAF4918D41852639655FFF7 SSM2166 Compressor Project http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1469409 Update: The parts needed for this project arrived and the pcb is populated and ready to test. The ssm2166 adapter is mounted in the socket on the right. Prototype pcb for the SSM2166 Compressor I am in the process of revising the compressor project that is based on the SSM2166 chip from Analog Devices. The DIP version of the chip is out of production but <a href="http://www.smallbearelec.com" title="Small Bear Electronics" target="_blank">Small Bear has assembled a large number of the SMD chips onto an adapter, which is shown the foreground. More news on this project once I test the redesigned circuit. Also, in the package of prototype pc boards that I just received were these two items that I made for switches. The one on the right is for true bypassing with the 3PDT, while the board on the left is an adapter for a mini rotary 1P6T switch. This allows 6 capacitors to be selected by turning the knob, and I intend to use it on the input of a treble booster. <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
ssm2166 compressor

Update: The parts needed for this project arrived and the pcb is populated and ready to test. The ssm2166 adapter is mounted in the socket on the right.


ssm2166 compressor pcb

Prototype pcb for the SSM2166 Compressor

I am in the process of revising the compressor project that is based on the SSM2166 chip from Analog Devices. The DIP version of the chip is out of production but Small Bear has assembled a large number of the SMD chips onto an adapter, which is shown the foreground. More news on this project once I test the redesigned circuit.

Also, in the package of prototype pc boards that I just received were these two items that I made for switches. The one on the right is for true bypassing with the 3PDT, while the board on the left is an adapter for a mini rotary 1P6T switch. This allows 6 capacitors to be selected by turning the knob, and I intend to use it on the input of a treble booster.

1P6T switch


Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Fri, 16 Dec 2011 15:27:31 GMT C2F64DDDD3855A727062D106BFAAA6F2 Improved Buffer http://blackmarketsunday.com/guitareffects.cfm?feature=2067034&postid=1629263 What makes this buffer board special is that the input has been designed to duplicate the input circuitry of the typical tube amp, and it thereby preserves the interaction between the guitar&#8217;s pickups and the buffer circuit. This makes the sound of the guitar more natural, with a similar resonant peak, while still providing a low impedance output drive for your cables and pedalboard. Read the <a href="http://www.muzique.com/tech/buffer.htm">complete details <a href="http://www.muzique.com/index.html">Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.
AMZ Buffer pcb

What makes this buffer board special is that the input has been designed to duplicate the input circuitry of the typical tube amp, and it thereby preserves the interaction between the guitar’s pickups and the buffer circuit. This makes the sound of the guitar more natural, with a similar resonant peak, while still providing a low impedance output drive for your cables and pedalboard.

Read the complete details

Copr. 2008 by Jack Orman Visit my site to learn more about guitar effects, download free projects or buy pc boards and germanium transistors.

]]> Fri, 16 Dec 2011 09:31:42 GMT F168D58AE2E3596227146875DE15A16B