smallsound/bigsound - mini  [traced]

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

Re: smallsound/bigsound mini

Postby smallsnd/bigsnd » 13 Jul 2016, 22:53

no worries! just fyi if you change the bias points of the first and/or second jfet specifically, you may or may not have issues with the main bias knob at lower settings and/or with low bass settings. :secret:
smallsnd/bigsnd
 
Posts: 28
Joined: 20 Feb 2013, 17:54
Has thanked: 1 time
Have thanks: 76 times

Re: smallsound/bigsound mini

Postby johnk » 14 Jul 2016, 11:15

i got mine completed in an etched 1590B with top jacks and it sounds just like my original:
You do not have the required permissions to view the files attached to this post.

For this message the author johnk has received thanks:
Lawnchair (21 Jul 2016, 18:43)
johnk
Resistor Ronker
 
Posts: 259
Joined: 05 Apr 2010, 08:33
Has thanked: 30 times
Have thanks: 246 times

Re: smallsound/bigsound mini

Postby smallsnd/bigsnd » 14 Jul 2016, 17:37

johnk wrote:i got mine completed in an etched 1590B with top jacks and it sounds just like my original:


damn. looks amazing! i love that layout too. might be some nice inspiration for a new layout of my own... :horsey: :hug: :popcorn:

For this message the author smallsnd/bigsnd has received thanks: 2
johnk (14 Jul 2016, 18:12), storyboardist (14 Jul 2016, 21:23)
smallsnd/bigsnd
 
Posts: 28
Joined: 20 Feb 2013, 17:54
Has thanked: 1 time
Have thanks: 76 times

Re: smallsound/bigsound mini

Postby storyboardist » 14 Jul 2016, 17:52

Nice work, John! Love top mounted jacks in a 1590B. :thumbsup

For this message the author storyboardist has received thanks:
johnk (14 Jul 2016, 18:12)
User avatar
storyboardist
Breadboard Brother
 
Posts: 80
Joined: 28 Dec 2013, 01:08
Location: Georgia, USA
Has thanked: 57 times
Have thanks: 147 times

Re: smallsound/bigsound mini

Postby jrfox92 » 24 Jul 2016, 23:56

smallsnd/bigsnd wrote:
johnk wrote:i got mine completed in an etched 1590B with top jacks and it sounds just like my original:


damn. looks amazing! i love that layout too. might be some nice inspiration for a new layout of my own... :horsey: :hug: :popcorn:

Should be expect some future Minis with soft switches? :idea: :horsey:
jrfox92
Breadboard Brother
 
Posts: 58
Joined: 11 Jun 2014, 05:46
Location: Akron, Ohio
Has thanked: 4 times
Have thanks: 38 times

Re: smallsound/bigsound mini

Postby burgerkong » 12 Aug 2016, 01:02

First off, much thanks for the schematics Brian!

Secondly, I've noticed that there are two pads, namely 'PAD1' and 'PAD3' that are unused (or don't show up) in other people's layouts - what are they used for?

I've included my schematic below, D3's LN5158 was replaced with a LN5817 (now D2) as seen in a vero board layout, was there a specific reason to do so? I've added (or rather will add) two traces to take the input/output from the stomp switch upn to the top mounted jacks hence the disconnected portions at the bottom.

ss_bs.jpg
You do not have the required permissions to view the files attached to this post.
burgerkong
 
Posts: 11
Joined: 06 Jan 2011, 20:09
Has thanked: 2 times
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby notnews32 » 12 Aug 2016, 12:49

johnk wrote:i got mine completed in an etched 1590B with top jacks and it sounds just like my original:


Hey John.. do you mind sharing what you use for a stomp-switching circuit? It looks like a relay bypass.. do you buy them from someone pre-made or make them yourself? I've been weary to jump into the relay world for fear of time-delays when stomping... i've read that some circuits have a noticeable delay between the stomp and the effect engaging.
notnews32
 
Posts: 13
Joined: 24 Dec 2015, 01:50
Has thanked: 1 time
Have thanks: 1 time

Re: smallsound/bigsound mini

Postby destro » 12 Aug 2016, 13:22

Sorry to derail the thread...notnews32 it's in this thread.

viewtopic.php?f=7&t=24484&p=248648#p248648

I've thought about going that route, but stumbled upon this...

http://effectslayouts.blogspot.com/2016 ... ching.html

It's a little more cost effective but I haven't tried either to compare.
User avatar
destro
Breadboard Brother
 
Posts: 117
Joined: 06 Oct 2007, 15:24
Location: Kentucky
Has thanked: 8 times
Have thanks: 34 times

Re: smallsound/bigsound mini

Postby burgerkong » 13 Aug 2016, 02:03

FWIW, here's a WIP on a 1590B compatible layout with PCB mounted pots and jacks. Looks super crowded I know, and you'll need to scrape out a channel on the bottom of the input jack so it clears the pot pads. Still tweaking positioning.

ss_bs5.jpg
You do not have the required permissions to view the files attached to this post.
burgerkong
 
Posts: 11
Joined: 06 Jan 2011, 20:09
Has thanked: 2 times
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby smallsnd/bigsnd » 13 Aug 2016, 03:38

burgerkong wrote:First off, much thanks for the schematics Brian!

Secondly, I've noticed that there are two pads, namely 'PAD1' and 'PAD3' that are unused (or don't show up) in other people's layouts - what are they used for?

I've included my schematic below, D3's LN5158 was replaced with a LN5817 (now D2) as seen in a vero board layout, was there a specific reason to do so? I've added (or rather will add) two traces to take the input/output from the stomp switch upn to the top mounted jacks hence the disconnected portions at the bottom.

ss_bs.jpg


8)
those 2 pads are for the offboard wiring to the BIAS (offboard) pot.
i'm sorry but i don't quite understand your 2nd question?

For this message the author smallsnd/bigsnd has received thanks:
burgerkong (13 Aug 2016, 13:55)
smallsnd/bigsnd
 
Posts: 28
Joined: 20 Feb 2013, 17:54
Has thanked: 1 time
Have thanks: 76 times

Re: smallsound/bigsound mini

Postby burgerkong » 13 Aug 2016, 04:00

smallsnd/bigsnd wrote:
burgerkong wrote:First off, much thanks for the schematics Brian!

Secondly, I've noticed that there are two pads, namely 'PAD1' and 'PAD3' that are unused (or don't show up) in other people's layouts - what are they used for?

I've included my schematic below, D3's LN5158 was replaced with a LN5817 (now D2) as seen in a vero board layout, was there a specific reason to do so? I've added (or rather will add) two traces to take the input/output from the stomp switch upn to the top mounted jacks hence the disconnected portions at the bottom.

ss_bs.jpg


8)
those 2 pads are for the offboard wiring to the BIAS (offboard) pot.
i'm sorry but i don't quite understand your 2nd question?


Alex's vero board layout has a LN5817 in place of the original diode:

http://tagboardeffects.blogspot.ca/2016 ... drive.html

Perhaps I should be asking him haha. I combined the 10K trimpot in series after the 10k bias as recommended, do the pad numbers corresepond to the pot legs, as in pad 3 pulls to VD+ and pad 1 links up with leg 1? Or do I have it totally baskwards/fubar'd? Lol, regardless, thanks for the reply!
burgerkong
 
Posts: 11
Joined: 06 Jan 2011, 20:09
Has thanked: 2 times
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby smallsnd/bigsnd » 13 Aug 2016, 04:41

burgerkong wrote:Alex's vero board layout has a LN5817 in place of the original diode:

http://tagboardeffects.blogspot.ca/2016 ... drive.html

Perhaps I should be asking him haha. I combined the 10K trimpot in series after the 10k bias as recommended, do the pad numbers corresepond to the pot legs, as in pad 3 pulls to VD+ and pad 1 links up with leg 1? Or do I have it totally baskwards/fubar'd? Lol, regardless, thanks for the reply!


oh whoops that was a typo on my original schem. should have read - 1n5818 but 1n5817 will of course work just the same.
as for the bias knob wiring, it's a little confusing on my schematic because until now no one else had to read it but me... you wire V+ to the trim, then from the trim to 3 on the bias knob, 2 on bias goes to the 2n5457.

as for the wiring, it's whichever way makes you happy - the pot is linear so neither way is wrong - i prefer higher voltage to be clockwise (which is what i just outlined)

For this message the author smallsnd/bigsnd has received thanks:
burgerkong (13 Aug 2016, 13:55)
smallsnd/bigsnd
 
Posts: 28
Joined: 20 Feb 2013, 17:54
Has thanked: 1 time
Have thanks: 76 times

Re: smallsound/bigsound mini

Postby burgerkong » 13 Aug 2016, 14:09

smallsnd/bigsnd wrote:
burgerkong wrote:Alex's vero board layout has a LN5817 in place of the original diode:

http://tagboardeffects.blogspot.ca/2016 ... drive.html

Perhaps I should be asking him haha. I combined the 10K trimpot in series after the 10k bias as recommended, do the pad numbers corresepond to the pot legs, as in pad 3 pulls to VD+ and pad 1 links up with leg 1? Or do I have it totally baskwards/fubar'd? Lol, regardless, thanks for the reply!


oh whoops that was a typo on my original schem. should have read - 1n5818 but 1n5817 will of course work just the same.
as for the bias knob wiring, it's a little confusing on my schematic because until now no one else had to read it but me... you wire V+ to the trim, then from the trim to 3 on the bias knob, 2 on bias goes to the 2n5457.

as for the wiring, it's whichever way makes you happy - the pot is linear so neither way is wrong - i prefer higher voltage to be clockwise (which is what i just outlined)


Sweet. Fixed my schematic (attached), I deleted the 4.7k resistor (R24) since presumably that's for the LED which will be on my switch breakout (offboard). 8)

ss_bs6.jpg


Cheers, Brendan
You do not have the required permissions to view the files attached to this post.
burgerkong
 
Posts: 11
Joined: 06 Jan 2011, 20:09
Has thanked: 2 times
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby smallsnd/bigsnd » 13 Aug 2016, 17:30

burgerkong wrote:Sweet. Fixed my schematic (attached), I deleted the 4.7k resistor (R24) since presumably that's for the LED which will be on my switch breakout (offboard). 8)

ss_bs6.jpg


Cheers, Brendan


errrr not exactly. ripup the connections you just made to that 220uf and BIAS1.
BIAS1 should not be connected or connected to BIAS2.
220uf should be between the 10ohm and ground.
smallsnd/bigsnd
 
Posts: 28
Joined: 20 Feb 2013, 17:54
Has thanked: 1 time
Have thanks: 76 times

Re: smallsound/bigsound mini

Postby johnk » 15 Aug 2016, 01:56

notnews32 wrote:
johnk wrote:i got mine completed in an etched 1590B with top jacks and it sounds just like my original:


Hey John.. do you mind sharing what you use for a stomp-switching circuit? It looks like a relay bypass.. do you buy them from someone pre-made or make them yourself? I've been weary to jump into the relay world for fear of time-delays when stomping... i've read that some circuits have a noticeable delay between the stomp and the effect engaging.


I used to make them myself (etch them) but OSH park now has them which is the same version hat I drew up. there's no delay with this one.

it's called "Andy Relay TQ2-L2-5V copy"

it does have one resistor value mislabeled though and I sent them an email about it but they just ignored it.
johnk
Resistor Ronker
 
Posts: 259
Joined: 05 Apr 2010, 08:33
Has thanked: 30 times
Have thanks: 246 times

Re: smallsound/bigsound mini

Postby guigui_jones » 14 Dec 2016, 21:55

johnk wrote:i got mine completed in an etched 1590B with top jacks and it sounds just like my original:


nice job johnk.. just an question : what's the pcd "under the footswitch" ?? :shock:

Thanks?
guigui_jones
 
Posts: 4
Joined: 14 Dec 2016, 21:39
Has thanked: 0 time
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby guigui_jones » 14 Dec 2016, 21:57

guigui_jones wrote:
johnk wrote:i got mine completed in an etched 1590B with top jacks and it sounds just like my original:


nice job johnk.. just an question : what's the pcd "under the footswitch" ?? :shock:

Thanks?



Oups.. sorry.. i reed your post to late with my english->french translate..
guigui_jones
 
Posts: 4
Joined: 14 Dec 2016, 21:39
Has thanked: 0 time
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby guigui_jones » 15 Dec 2016, 13:47

Hello everybody.
I wish to start the realization of the mini but I"m a little lost in the indication of the transistors ..

On " bubstance" post..
Q1 2N5089
Q2 J201
Q3 2N5457
Q4 J201

On schematic
Q2,Q3, Q4 2N5457T
Q6 2N5089T

On Brian post "i use J201 for Q2 and Q4, 2N5457 for Q3"

On " storyboardist" image (typon)
Q1, Q3 => J201
Q2, 2N5457
Q4, 2N5089

Could you help me make the right choice?
Great Thanks.
guigui_jones
 
Posts: 4
Joined: 14 Dec 2016, 21:39
Has thanked: 0 time
Have thanks: 0 time

Re: smallsound/bigsound mini

Postby smallsnd/bigsnd » 16 Dec 2016, 01:45

guigui_jones wrote:Hello everybody.
I wish to start the realization of the mini but I"m a little lost in the indication of the transistors ..

On " bubstance" post..
Q1 2N5089
Q2 J201
Q3 2N5457
Q4 J201

On schematic
Q2,Q3, Q4 2N5457T
Q6 2N5089T

On Brian post "i use J201 for Q2 and Q4, 2N5457 for Q3"

On " storyboardist" image (typon)
Q1, Q3 => J201
Q2, 2N5457
Q4, 2N5089

Could you help me make the right choice?
Great Thanks.


it's the same on all of them.
J201 for the first stage, 2n5457 for the second stage, J201 for the third stage and 2N5089 (or similar BJT) for the last stage.
smallsnd/bigsnd
 
Posts: 28
Joined: 20 Feb 2013, 17:54
Has thanked: 1 time
Have thanks: 76 times

Re: smallsound/bigsound mini

Postby guigui_jones » 19 Dec 2016, 07:48

Great thanks Brian.. i'm a newbie.... ;)
guigui_jones
 
Posts: 4
Joined: 14 Dec 2016, 21:39
Has thanked: 0 time
Have thanks: 0 time

PreviousNext

Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: arxxra, marckosolo1, ryan77 and 7 guests