Craig Anderton circuits

soulsonic · Post by **soulsonic** » 09 Sep 2007, 00:27

Good job with the heatsink/ground plane.... it's an essential thing.

RLBJR65 · Post by **RLBJR65** » 09 Sep 2007, 12:51

Thanks.
If you soldered the IC directly to the board I think there is enough ground plane / heatsink that if no external heat sink would be required. They do have thermal overload protection so (fingers crossed) it would only get hot and shut off. Heck the board is less than 2" wide I could easily space things out a bit if more is required.

I don't know if the LM380N is still in production, National doesn't list it as obsolete anyway. I found plenty of them online, Futurelec has them for $1.00ea. I got some for 50 cents ea. at my favorite surplus dealer

Mouser has the NTE replacement NTE704A $6.23 ea. YIKES!

analogguru · Post by **analogguru** » 09 Sep 2007, 12:55

I don't know if the LM380N is still in production, National doesn't list it as obsolete anyway. I found plenty of them online, Futurelec has them for $1.00ea. I got some for 50 cents ea. at my favorite surplus dealer

Take care.... in the last years have also been around 8-pin-versions.

analogguru

RLBJR65 · Post by **RLBJR65** » 09 Sep 2007, 13:09

Thanks AG!

Good catch! I'll make sure to note it on the layout.
It's such a simple circuit maybe I will make a board for the 8 pin too.

8 pin Layout https://img265.imageshack.us/img265/9606/caha8hv6.gif

RLBJR65 · Post by **RLBJR65** » 09 Sep 2007, 19:52

Electronic footswitch added https://img517.imageshack.us/my.php?ima ... otsro9.gif

RLBJR65 · Post by **RLBJR65** » 12 Sep 2007, 00:52

Super Tone Control added https://img201.imageshack.us/img201/778 ... trozr1.gif

Question about the schem. in the feedback loop of IC 1D there are 3 - 10K then a tap labled M. What is it for? On the layout it just goes to a pad labeled M with no connection. No notes about it in the book.

analogguru · Post by **analogguru** » 12 Sep 2007, 06:18

Question about the schem. in the feedback loop of IC 1D there are 3 - 10K then a tap labled M. What is it for?

In theory this is a "virtual ground" "summing bus". You could connect there another input signals with additional mixing resistors. For example a second filter.

You cannot connect a second op-amp stage (similar as shown) there.

The schematic shown is well known as "state-variable filter" and used nearly in every "Parametric Equalizer". also used in the EH Q-Tron/Mini-Q-tron, or the Tycobrahe Parapedal and may others

analogguru

bajaman · Post by **bajaman** » 12 Sep 2007, 07:32

and, a modified version (state variable filter)
is used in the BBE Sonic Stomp pedal too

bajaman

RLBJR65 · Post by **RLBJR65** » 12 Sep 2007, 19:41

Thanks guys!

Mixer added https://img402.imageshack.us/img402/483 ... xerlr3.gif

John Lyons · Post by **John Lyons** » 12 Sep 2007, 22:44

RLBJR65
The point M on the board is not used. (been there...)
Once again, this one is a great tone control with radical as well as slight boosts or cuts.

Hooking up the STC to the envelope follower in the book would be nice as well for an auto wah type quack or sweeping filter.

Thanks for drawing these up!! I have the book(s) but the info needs to be out there...

John

RLBJR65 · Post by **RLBJR65** » 14 Sep 2007, 00:29

Thanks John
I wonder if JD would complain about you making a few copies of those boards

Oh well I'm glad they pcb artwork is available and he did at least change the boards that used dual opamps.

RLBJR65 · Post by **RLBJR65** » 14 Sep 2007, 11:32

Practice Play Along added https://img237.imageshack.us/img237/309 ... ppaab6.gif

luap77 · Post by **luap77** » 15 Sep 2007, 21:52

Hi,

I would very much like to build the Anderton "Stack in a Box". Does anybody have a schematic, pcb layout etc that they are willing to share?

Thanks.

Paul E

RLBJR65 · Post by **RLBJR65** » 15 Sep 2007, 23:33

luap77 wrote:I would very much like to build the Anderton "Stack in a Box". Does anybody have a schematic, pcb layout etc that they are willing to share?

First post in the thread

http://www.paia.com/proddetail.asp?prod=9210K The schematic is there and you can buy their kit But I don't know of any other layout around.

RLBJR65 · Post by **RLBJR65** » 16 Sep 2007, 02:47

Phase Shifter added https://img461.imageshack.us/img461/743 ... terto8.gif

luap77 · Post by **luap77** » 17 Sep 2007, 06:31

Thank you for the link RLBJR65

RLBJR65 · Post by **RLBJR65** » 20 Sep 2007, 01:22

Spluffer https://img530.imageshack.us/img530/449 ... ferji7.gif

RLBJR65 · Post by **RLBJR65** » 20 Sep 2007, 01:23

RLBJR65 wrote:HeadPhone Amp from EPFM
https://img126.imageshack.us/my.php?ima ... amphs3.gif

I'll redraw the other projects as I get time.
You still got to get the book for build notes, tweaks and mods

Project #1 Preamp https://img61.imageshack.us/my.php?imag ... ampgj0.gif

Project #2 Metronome https://img61.imageshack.us/my.php?imag ... omeuv6.gif

Project #3 Passive Tone Controll (posted Meanderthal) https://i86.photobucket.com/albums/k99/ ... vetone.jpg

Project #4 Head Phone Amp (posted above)
Headphone amp layout. https://img267.imageshack.us/my.php?image=cahaik7.gif
Headphone Amp layout for 8 pin LM380N-8 https://img265.imageshack.us/img265/9606/caha8hv6.gif

Project #5 Mini Amp that uses an obsolete audio amp IC UA706 or TBA641B https://img412.imageshack.us/my.php?ima ... ampgm9.gif

Project #6 Ultra Fuzz https://img165.imageshack.us/my.php?ima ... uzzjd1.gif

Project #7 Bass Fuzz https://img106.imageshack.us/my.php?ima ... uzzqa0.gif

Project #8 Compressor / Limiter (posted ModMan) https://i197.photobucket.com/albums/aa2 ... or1980.jpg

Project #9 Ring Modulator https://img413.imageshack.us/my.php?ima ... torcd7.gif

Project #10 Dual Filter Voicing Unit (Thanks Andrew!) Added PS info https://img106.imageshack.us/my.php?ima ... filig7.gif

Project #11 Adding Bypass switches. Won't do that one.

Project #12 Guitar rewiring. Telecaster Rewire http://users.adelphia.net/~cygnusx_1/anderton_jpeg.html

Project #13 Bipolar AC Adaptor: + / - 9v Power supply https://img530.imageshack.us/img530/325 ... terux0.gif

Project #14 Treble Booster https://img374.imageshack.us/img374/131 ... ostwr4.gif

Project #15 Electronic Foot Switch https://img517.imageshack.us/my.php?ima ... otsro9.gif

Project #16 Tuning Standard. Uses obsolete MK50240 Tone generator not worth re-drawing unless someone wants it.

Project #17 Super Tone Control https://img201.imageshack.us/img201/778 ... trozr1.gif

Project #18 8 in, out Mixer. https://img402.imageshack.us/img402/483 ... xerlr3.gif

Project #19 Using an Ohm-Milliammeter. NAH!

Project #20 Practice Play Along https://img237.imageshack.us/img237/309 ... ppaab6.gif

Project #21 Phase Shifter https://img461.imageshack.us/img461/743 ... terto8.gif

Project #22 Making patch cords. NAH!
Project #23 Talk Box. NAH!

Project #24 Tube Sound Fuzz (posted Modman) http://www.geocities.com/CollegePark/Li ... 55/tsf.gif

Project #25 Envelope Follower

Project #26 Spluffer, combination splitter buffer. https://img530.imageshack.us/img530/449 ... ferji7.gif

Project #27 Noise Gate

WOW, that will keep me busy for a while, I forgot there were that many!

I'll do them in order unless someone has a request.

RLBJR65 · Post by **RLBJR65** » 25 Sep 2007, 00:57

Envelope Follower https://img166.imageshack.us/img166/935 ... oweql2.gif

Couple of usefull circuits from the back of the book. How to make a dual supply from a single 9v
https://img166.imageshack.us/img166/627 ... plycg1.gif

feelsobad · Post by **feelsobad** » 05 Mar 2008, 05:45

I have an interest in Project #27 Noise Gate.
Anyone have that schematics?