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Topics - Scruffie

#1
From time to time I dabble with cameras and I need a spare part 3D printed to repair one, would any of you kind people be willing to undertake such a task for moi? :)
#2
Open Discussion / Rustbucket Mod Idea.
October 29, 2020, 06:18:27 PM
Haven't the time to try it, but hacking the Deluxe Memory Man modulation section on to the Rustbucket could add some interesting finger movement to those violin & cello tones.

Might even get a bit analogue mellotron.
#3
Could any of you fine people give me a clock reading for the vibrato setting at minimum rate & depth?

Bonus points for maximum depth and chorus at min. and max rate.
#5
Open Discussion / EHX Attack Decay
January 22, 2019, 09:06:21 PM


Took them long enough, doesn't seem like it's really going to be much the same as the original though.
#7
Open Discussion / A small favour for a friend of mine.
August 18, 2018, 02:40:46 PM
A friend has asked if I can help her put a collage together for her wife, if you'd be willing to help out a lovely couple, could you please take a photo of a message with "She loves you, even in (country, town)" with the date (21.03.13) as in the photo attached.

Take it at your gig, outside your window, at a local spot or monument.

If you'd be willing to take a minute to help a stranger show their love it would be greatly appreciated  :)
#8
Is anyone else using Firefox getting an 'Your connection is insecure' error page when trying to visit DIYStompboxes? Opera doesn't seem to like its certificate either.
#9
Open Discussion / Donut?
February 08, 2018, 07:44:46 PM
Mmm... Doughnut.
#10
Open Discussion / Today's Repair.
February 06, 2017, 09:32:58 PM
I just had to show off because I finally got my hands on one of these, an A/DA Harmony Synthesizer, god damn is this a crazy circuit.

#12
Open Discussion / EHX releases the Mel 9
March 14, 2016, 02:30:06 PM
I've been waiting for this to come... not listened to the demo yet but i'm fairly sure I need it.

http://www.ehx.com/products/mel9

#13
Using firefox, just started yesterday, not sure if it's happened because of the latest browser update or something to do with the site itself.
#14
Tech Help - Projects Page / Some Basic Debugging Voltages
February 18, 2015, 06:47:27 PM
I figured this might save some time, some basic voltages to expect for debugging, all readings are approximate, use your judgement. They may not apply to everything, but in a pinch they might just help solve your issue.

This all applies to positive voltage effects!

If you have a circuit with standard ground, V.Ref and 9/12/15/18V supply, any audio path dual opamps you can usually expect to see;
1 - 1/2 Supply
2 - 1/2 Supply
3 - 1/2 Supply (Sometimes this may show lower)
4 - 0V
5 - 1/2 Supply (Sometimes this may show lower)
6 - 1/2 Supply
7 - 1/2 Supply
8 - Voltage Supply

If the pedal uses a charge pump to achieve +/-9V or Split Supply, the audio path opamps should read;
1 - 0V
2 - 0V
3 - 0V
4 - -9V
5 - 0V
6 - 0V
7 - 0V
8 - +9V

In effects with modulation, if you have a dual opamp LFO at 9/12/15/18V (this will have a rate control connected to it) you should expect to see;
1 - Varying Voltage
2 - N/A
3 - N/A
4 - 0V
5 - N/A
6 - N/A
7 - Varying Voltage
8 - Supply voltage
The varying voltages here indicate that your LFO is running, the N/A pins will vary, the main thing is there is moving voltage.

8 Pin BBDs (3007 etc.)
1 - Supply Voltage
2 - 1/2 Supply
3 - This will be changed by the bias pot, start at 1/2 Supply and adjust until the effect passes.
4 - Between 0 - 1V
5 - 0 V
6 - 1/2 Supply
7 - Just above (approx 1V) pin 3s voltage
8 - Just above (approx 1V) pin 3s voltage

8 Pin BBDs (3207, 3208 etc) you should see
1 - 0V
2 - 1/2 Supply
3 - This will be changed by the bias pot, start at 1/2 Supply and adjust until the effect passes.
4 - Supply or up to 1V below
5 - Supply Voltage
6 - 1/2 Supply
7 - Approx half supply (varies with pin 3)
8 - Approx half supply (varies with pin 3)

14-Pin Package BBDs (3005, 3008)
1 - Supply Voltage
2 - 1/2 Supply
3 - Just above (approx 1V) pin 7s voltage
4 - Just above (approx 1V) pin 7s voltage
5 - 0V
6 - 1/2 Supply
7 - This will be changed by the bias pot, start at 1/2 Supply and adjust until the effect passes.
8 - Between 0 - 1V

14-Pin Package BBDs (3205, 3208)
1 - 0V
2 - 1/2 Supply
3 - Approx half supply (varies with pin 7)
4 - Approx half supply (varies with pin 7)
5 - Supply
6 - 1/2 Supply
7 - This will be changed by the bias pot, start at 1/2 Supply and adjust until the effect passes.
8 - Supply or up to 1V below
#15
And they look a little different, I know Steve wasn't purchasing them from CoolAudio again until they fixed the issues with high biasing points and excess distortion so I wonder if this new batch (which Steve has QA tested) are an improvement over what we've seen before.
#17
Open Discussion / Saw this over at ILF - Paypal
October 11, 2014, 02:51:01 PM
Apparently Paypal are extending the time buyers can make disputes from 45 days to 180 days, don't think i'll be selling anything to anyone I don't know from now on...
#18
Open Discussion / The future of BBDs
July 17, 2014, 11:24:04 PM
Been away for a week, but this could be big news http://www.bossus.com/gear/productdetails.php?ProductId=1330

Companies like BOSS make continued production much more likely.
#19
We all know that the Chinese relabel BBDs, in fact alot of the ones that are totally legitimate that pass through my hands I tend to find have been all stamped to be uniform in appearance.

Well I was going through such a batch of MN3008 I had today (I usually test in a chorus with a daughter board just for a quick check before putting them in a delay as the sound's more obvious) and I noticed one sounded... well, odd, really really deep and pitch changey.

Everyone's heard of MN3005 turning out to be MN3008, i've got the first MN3008 that turned out to be a MN3005!  ;D

I spent half an hour testing it back and forth against every legit MN3008 & 3005 I had in a Memory man, no doubt about it, it's an MN3005 stamped as MN3008, judging by the bottom (which is still original) and also the actual feel of it (there is a noticeable difference) this was one of the early white stamped chips and i'm guessing the last number had rubbed off enough that it got mistaken for an '8' rather than '5'.
#20
Open Discussion / Poll - 13700 or 3080
April 26, 2014, 10:17:27 PM
This is just a general build question as i've seen it coming up quite a bit, in a case where an OTA was in a non-audio position (as some have complained of noise with them) and you only needed ONE would you rather use a 13700/13600 where at least half the chip is wasted (possibly more if you didn't use the darlingtons) OR use a 3080 to its full potential and save board space/pin soldering/whatever your reason.

And to up it, that space difference could be the difference in enclosure size of 1590BB to 1790NS (or 1590B to 125B if you prefer or 125B to 1590BB).