Circuitbenders Forum

Circuitbenders Forum => Circuitbending discussion => Effects Units => Topic started by: Matt the Modulator on August 24, 2009, 12:10:42 AM

Title: Spring reverb from maplin pre-amps kits
Post by: Matt the Modulator on August 24, 2009, 12:10:42 AM

Ive just made a spring reverb unit using modified maplin amp kits and iam very proud
http://www.flickr.com/photos/matt_the_modulator/3849312048/# (http://www.flickr.com/photos/matt_the_modulator/3849312048/#)
http://www.flickr.com/photos/matt_the_modulator/3848518047/# (http://www.flickr.com/photos/matt_the_modulator/3848518047/#)

some slight modifications to the amp kits werer made to change the gain and input impedance to get better results but pretty much the kits are stock with no circuit changes needed i used
2 x Maplin stereo pre-amp KIT (N47FL )
1x Maplin 1W amp kit (N48FL ) as the reverb driver
1x velleman pre-amp kit as the wet / dry mixer stage (VE21X)

Title: Re: Spring reverb from maplin pre-amps kits
Post by: SineHacker on August 24, 2009, 12:23:46 AM

very nice project, I like the pics!

Title: Re: Spring reverb from maplin pre-amps kits
Post by: Gordonjcp on August 24, 2009, 02:05:42 AM

Nice!  Can you overdrive the spring to get those boingy transients like on old King Tubby tracks?

Title: Re: Spring reverb from maplin pre-amps kits
Post by: Matt the Modulator on August 24, 2009, 05:39:39 PM

Cheers!  . yeh its possible to over load the springs and get a good thumpinmg boing out of it, sounds a bit muddy when you do that thou its not the best sounding unit but then it not trying to be. The tank i have used is a battered cheepest version acutronics do ile put up a video when i find the cable for my camera.

Title: Re: Spring reverb from maplin pre-amps kits
Post by: LoFi-Ninja on August 24, 2009, 10:28:47 PM

Cool ! Let's have some sounds!

BTW: It's on makezine.. http://blog.makezine.com/archive/2009/08/springbox_rocks_the_reverb.html (http://blog.makezine.com/archive/2009/08/springbox_rocks_the_reverb.html)

Title: Re: Spring reverb from maplin pre-amps kits
Post by: Matt the Modulator on August 25, 2009, 09:22:22 PM

some quick audio samples of the reverb below
http://magicmess.co.uk/demo_songs/Spring-1.mp3 (http://magicmess.co.uk/demo_songs/Spring-1.mp3)
http://magicmess.co.uk/demo_songs/Spring-2.mp3 (http://magicmess.co.uk/demo_songs/Spring-2.mp3)
http://magicmess.co.uk/demo_songs/Spring-3.mp3 (http://magicmess.co.uk/demo_songs/Spring-3.mp3)

Title: Re: Spring reverb from maplin pre-amps kits
Post by: nochtanseenspecht on August 26, 2009, 09:16:46 PM

hey nice ! i think i used the same tank in a unit ( it has a bit the same sound/decay)
but mine's much noisier.. did you shield it ? doesn't look like in the photo's..

nice project   :)

Title: Re: Spring reverb from maplin pre-amps kits
Post by: Matt the Modulator on August 27, 2009, 07:48:34 PM

Quote from: nochtanseenspecht on August 26, 2009, 09:16:46 PM

. did you shield it ? doesn't look like in the photo's..

yeh the spring case is connected to ground and the case of the spring drive pot (going to the 1w amp) is also connected to ground. The tone controll taken from the big muff schematic cleans up the sound a bit but you loose a little volume