Greer Lightspeed

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.

Greer Lightspeed

Postby horselover_fat » 31 Aug 2014, 05:07

I've searched the Net, and can't find any info about what it is based on.

I know Greer, and he'll never have an original idea, so i *know* it's based
on something. I suspect he's pulled a JHS and based it on something from
Runoffgroove.

If anyone has traced it, or knows otherwise, all thanks.
horselover_fat
 
Posts: 10
Joined: 19 Apr 2010, 06:32
Has thanked: 0 time
Have thanks: 0 time

Re: Greer Lightspeed

Postby caspercody » 11 Sep 2014, 22:13

I have no information on this, but wanted to bump this. Also if you know Greer maybe ask him about it?
caspercody
Resistor Ronker
 
Posts: 311
Joined: 15 Jul 2009, 15:34
Has thanked: 30 times
Have thanks: 48 times

Re: Greer Lightspeed

Postby horselover_fat » 29 Sep 2014, 00:10

I no longer live in Athens, so I'm unable to ask him. Even if I could,
getting an honest from him about much of anything is next to impossible.
He's well known in Athens for being a bit challenged in the honesty department.

He told me with a straight face, looking me in the eye, that the Ghetto Stomp
was an original design all his own.
horselover_fat
 
Posts: 10
Joined: 19 Apr 2010, 06:32
Has thanked: 0 time
Have thanks: 0 time

Re: Greer Lightspeed

Postby Fredenando » 29 Sep 2014, 11:08

I have found this on a japanese web:

Image

For this message the author Fredenando has received thanks:
Blitz Krieg (01 Oct 2014, 11:25)
Fredenando
Breadboard Brother
 
Posts: 139
Joined: 20 Mar 2010, 12:37
Has thanked: 477 times
Have thanks: 93 times

Re: Greer Lightspeed

Postby horselover_fat » 12 Oct 2014, 18:43

For the first five or six years he was building pedals, he didn't goop anything.
His gooping of pedals tells me he has something to hide now.
horselover_fat
 
Posts: 10
Joined: 19 Apr 2010, 06:32
Has thanked: 0 time
Have thanks: 0 time

Greer Lightspeed

Postby RiGLEY » 15 Mar 2016, 15:02

Any info?

Image
User avatar
RiGLEY
 
Posts: 32
Joined: 08 Sep 2007, 11:43
Location: Budapest, Hungary
Has thanked: 1 time
Have thanks: 0 time

Re: Greer Lightspeed

Postby FiveseveN » 15 Mar 2016, 15:56

Previous thread: viewtopic.php?f=33&t=24982&p=243495
Put me down for $10 on Tubescreamer variant.
Ignorance more frequently begets confidence than does knowledge. (Charles Darwin)
User avatar
FiveseveN
Resistor Ronker
 
Posts: 419
Joined: 25 Oct 2009, 22:20
Location: Romania
Has thanked: 132 times
Have thanks: 53 times

Re: Greer Lightspeed

Postby roseblood11 » 21 May 2019, 12:23

*BUMP*

I'd really like to see a schematic for this one. Maybe it's just a variation of the tube screamer, but a very good one.
https://www.greeramps.com/products/lightspeed
roseblood11
Tube Twister
 
Posts: 1824
Joined: 23 Aug 2008, 15:21
Has thanked: 352 times
Have thanks: 310 times

Re: Greer Lightspeed

Postby 287m » 21 May 2019, 15:11

roseblood11 wrote:*BUMP*

I'd really like to see a schematic for this one. Maybe it's just a variation of the tube screamer, but a very good one.
https://www.greeramps.com/products/lightspeed


https://www.pedalpcb.com/product/mach1od

easy to build in 1590a. hehe
287m
Breadboard Brother
 
Posts: 104
Joined: 11 Nov 2014, 23:51
Location: Heaven ~ Hell
Has thanked: 320 times
Have thanks: 57 times

Re: Greer Lightspeed

Postby vtguedes » 21 May 2019, 15:16

Pedal PCB has it traced. It is a timmy with fixed eq controls, assymetrical clipping with 5 diodes (3+2) back to back and a simple treble roll-off for tone control at the end.

Build docs here: https://www.pedalpcb.com/product/mach1od/

I have done a vero layout from PedalPCB's schematic, it is verified and sounds pretty much like the lightspeed.

https://drive.google.com/open?id=10QOkUyK6EODLBifD7B1cc4mZTLnIP-9D
Last edited by vtguedes on 21 May 2019, 15:43, edited 1 time in total.

For this message the author vtguedes has received thanks:
Manfred (21 May 2019, 18:26)
vtguedes
 
Posts: 16
Joined: 04 Oct 2017, 23:07
Has thanked: 2 times
Have thanks: 5 times

Re: Greer Lightspeed

Postby ppluis0 » 21 May 2019, 15:23

HEY !!!

Why invest in an expensive op amp ($ 4.30) for this application ?
Any dual operational at fraction of cost can be used in this overdrive without change in performance... :roll:

Cheers,
Jose
User avatar
ppluis0
Cap Cooler
 
Posts: 592
Joined: 14 Jul 2010, 19:33
Location: Argentina
Has thanked: 43 times
Have thanks: 87 times

Re: Greer Lightspeed

Postby vtguedes » 21 May 2019, 15:33

Oh, I've tested my build with 4558, TL072, TL082 and the OPA. All sounded the same to my ears, I just wrote in the layout the same part that was in the schematic.

For this message the author vtguedes has received thanks:
Ben N (28 May 2019, 12:48)
vtguedes
 
Posts: 16
Joined: 04 Oct 2017, 23:07
Has thanked: 2 times
Have thanks: 5 times

Re: Greer Lightspeed

Postby roseblood11 » 21 May 2019, 17:13

Hiss might be a bit lower, but...

Things are boring these days. PedalPCB has everything already...
roseblood11
Tube Twister
 
Posts: 1824
Joined: 23 Aug 2008, 15:21
Has thanked: 352 times
Have thanks: 310 times

Re: Greer Lightspeed

Postby FeVeR2112 » 23 May 2019, 01:57

roseblood11 wrote:Things are boring these days. PedalPCB has everything already...


... and is that BUGGing you?
FeVeR2112
Breadboard Brother
 
Posts: 77
Joined: 27 Dec 2013, 07:07
Has thanked: 22 times
Have thanks: 34 times

Re: Greer Lightspeed

Postby Ben N » 28 May 2019, 12:49

Is that just hot glue? Even the goop is unimpressive.

For this message the author Ben N has received thanks:
roseblood11 (28 May 2019, 13:28)
Ben N
Resistor Ronker
 
Posts: 303
Joined: 12 Dec 2008, 04:34
Location: Israel
Has thanked: 15 times
Have thanks: 11 times

Re: Greer Lightspeed

Postby Huff and Doback » 28 May 2019, 13:30

Is it possible to build the Timmy with the Lightspeed diode arrangement as a switching option? I have both pedals and prefer the Lightspeed with single coils and the Timmy with humbuckers.
Huff and Doback
 
Posts: 1
Joined: 01 Dec 2017, 00:58
Has thanked: 0 time
Have thanks: 0 time

Re: Greer Lightspeed

Postby roseblood11 » 28 May 2019, 14:07

Sure. Leave enough space for a rotary switch for various clipping arrangements. Or use a simple dpdt switch for two sounds. A dpdt on-on-on can be used for three sounds: One side of each diode combo is hardwired to the circuit, the other sides go to lugs 1, 4, 6 respectively. There's many combinations that sound good in this circuit. I tried germanium diodes, LED's an Mosfet Transistors, and all were useful.

https://musikding.rocks/userImages/a6/361-a695797e.jpg
roseblood11
Tube Twister
 
Posts: 1824
Joined: 23 Aug 2008, 15:21
Has thanked: 352 times
Have thanks: 310 times

Re: Greer Lightspeed

Postby vtguedes » 28 May 2019, 17:44

Be aware that, besides the clipping options, the Lightspeed is a Timmy with fixed bass and treble controls AND a treble roll-off after the 2nd op amp. That might make some of the difference between single coils and humbuckers you said.
Anyway, you could make a regular lightspeed and put a spdt on-on switch to turn the "lightspeed" tone pot on and off.
vtguedes
 
Posts: 16
Joined: 04 Oct 2017, 23:07
Has thanked: 2 times
Have thanks: 5 times

Re: Greer Lightspeed

Postby FeVeR2112 » 28 May 2019, 23:29

I built it but have a squeal happening when drive and loudness reach a certain point in relation to each other - i.e.: when the drive is full up, the loudness will cause squeal when about half way. the same happens when the drive is lower but the loudness is higher. Anyone else encounter this?
FeVeR2112
Breadboard Brother
 
Posts: 77
Joined: 27 Dec 2013, 07:07
Has thanked: 22 times
Have thanks: 34 times

Re: Greer Lightspeed

Postby HamishR » 29 May 2019, 03:28

While I'm not a huge fan of the Timmy it's still a beloved pedal of many for good reason. The Lightspeed seems to be a way of taking a revered pedal and making it less useful. I built one to see what the fuss was about and found it altogether underwhelming. I'd take a Timmy over the Lightspeed any day.
HamishR
Breadboard Brother
 
Posts: 59
Joined: 31 May 2016, 15:51
Has thanked: 5 times
Have thanks: 19 times

Next

Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: 456Onno456, Etch107 and 4 guests