Comments on: Spring Reverb http://gaussmarkov.net/wordpress/circuits/spring-reverb/ guitar stompboxes and electronics Thu, 09 Sep 2010 05:27:44 -0700 http://wordpress.org/?v=2.9.2 hourly 1 By: Pawel http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1389 Pawel Thu, 08 Jul 2010 14:14:33 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1389 Is it possible to do this reverb without CD4011? Is it only for clipping detection, does it clip the sound, what it does? Is it possible to do this reverb without CD4011? Is it only for clipping detection, does it clip the sound, what it does?

]]> By: Rangelife http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1267 Rangelife Fri, 01 Jan 2010 18:44:53 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1267 vhbram: I've just built one of these - Set the voltage at the collectors of the two 2N3906 transistors to 6V. vhbram & george: The transformer in the partlist doesn't seem to be able to drive the springs har enough. Do what george suggests, use a matching transformer. I used a 42TU013 (as suggested to me by Solderman) and it sounds much much better! vhbram:
I’ve just built one of these – Set the voltage at the collectors of the two 2N3906 transistors to 6V.

vhbram & george:
The transformer in the partlist doesn’t seem to be able to drive the springs har enough. Do what george suggests, use a matching transformer. I used a 42TU013 (as suggested to me by Solderman) and it sounds much much better!

]]> By: george http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1243 george Sat, 05 Dec 2009 15:59:00 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1243 Hi, Gaussmarkov I have built it and now I'm experimenting with the matching transformer. Just checked the 42TM018 and it's 10K:10K. Isn't better to use 1K:8R? Like 42TL013 or 42TM013? By the way do you have any idea which is the difference btw TL and TM series? Thanks for your great website! Hi, Gaussmarkov
I have built it and now I’m experimenting with the matching transformer. Just checked the 42TM018 and it’s 10K:10K. Isn’t better to use 1K:8R? Like 42TL013 or 42TM013? By the way do you have any idea which is the difference btw TL and TM series? Thanks for your great website!

]]> By: marmora http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1199 marmora Wed, 30 Sep 2009 01:28:36 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1199 I've got an old OC Electronics tank that's the equivalent of the Accutronics' 8FB3A1B. Input impedance 1475 and output 2250 ohms. Is is possible to mod this circuit for use with this tank? I’ve got an old OC Electronics tank that’s the equivalent of the Accutronics’ 8FB3A1B. Input impedance 1475 and output 2250 ohms. Is is possible to mod this circuit for use with this tank?

]]> By: rocklander http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1076 rocklander Sat, 04 Apr 2009 08:17:41 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1076 is there any further instruction on what to do with biasing etc? I've not done any work with a xformer.. is it likely to present difficulties? is a particular tank required (possibly differing impedances I guess?) thanks in advance for any questions answered is there any further instruction on what to do with biasing etc? I’ve not done any work with a xformer.. is it likely to present difficulties?
is a particular tank required (possibly differing impedances I guess?)
thanks in advance for any questions answered

]]> By: vhbram http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-936 vhbram Tue, 23 Sep 2008 11:57:20 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-936 I've just built it, with the 8AB2A1B tank and it sounds great, but a bit too subtle I think. Could that be caused by the the tank? The decay is good, but I want more reverb than dry signal. I don't know how to set the both drive and input bias so I set them that I have the most reverb and no distortion. Is this reverb really that subtle? Here is a soundsample at full drive and reverb level: http://users.skynet.be/vhbram/reverb.mp3 I’ve just built it, with the 8AB2A1B tank and it sounds great, but a bit too subtle I think. Could that be caused by the the tank?

The decay is good, but I want more reverb than dry signal.

I don’t know how to set the both drive and input bias so I set them that I have the most reverb and no distortion.

Is this reverb really that subtle?

Here is a soundsample at full drive and reverb level:

http://users.skynet.be/vhbram/reverb.mp3

]]> By: matt n http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-892 matt n Fri, 01 Aug 2008 20:57:08 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-892 This is just what I have been looking for. My problem with trying this is that I am totally novice with wiring. I have a difficult time just heating up solder for speakers let-alone any of this kind of stuff. I have always wanted to treat the reverb tank as a unit and not impressed with the HoliGrail. I have the reverb tank, is there a possibility of getting the guts? How much would charge? This is just what I have been looking for. My problem with trying this is that I am totally novice with wiring. I have a difficult time just heating up solder for speakers let-alone any of this kind of stuff. I have always wanted to treat the reverb tank as a unit and not impressed with the HoliGrail. I have the reverb tank, is there a possibility of getting the guts? How much would charge?

]]> By: gaussmarkov http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-845 gaussmarkov Wed, 02 Jul 2008 02:24:04 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-845 Solderman, wonderful! send your pics and i will make some changes to the board. cheers! Solderman,

wonderful! send your pics and i will make some changes to the board.

cheers!

]]> By: Solderman http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-844 Solderman Tue, 01 Jul 2008 06:09:29 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-844 Hi Gausmarkow Thanks for a splendid site. I really enjoy and have learned much from your “pats” section. I just made the “Spring reverb project” and I am very pleased with the result. One of my goals with this project was to cram every ting in to a BIMBOX 4004 (Same as a Hammond 1590B except that it is 40mm deep). It was not that complicated. I used your layout and etched my own PCB. One thing I discovered tough was that I needed (at least one) hole for a PCB fixture. At the top end of the PCB I used double-coated adhesive tape to secure the PCB to the flat backside of the “In” and “drive” pots, but at the other end I needed a hole to fixate the PCB. The layout is tight and quite crowded (good design job I think). To accomplice this I drilled a 4,5 mm hole in the only area I found that was big enough. This was between R28, C1,C15, Rev_Bias Trim. As a result you will cut the trace going from “Input_2” to C1. This I solved by drilling a new hole close to C1 and solder the wire there instead. If you have the time I think it would be nice to have a pad there just in case someone like me shuld have the same idée. Of cause one can always cut the PCB with more space around the traces to fit holes in each corner but in my case I have only 3 mm in length and 2 mm in with to play with to get the PCB to fit within this box together with the rest of the stuff. I will send you pictures of my build as soon as my wife gets back from here holiday with our digital camera. Solderman Hi Gausmarkow

Thanks for a splendid site. I really enjoy and have learned much from your “pats” section.
I just made the “Spring reverb project” and I am very pleased with the result. One of my goals with this project was to cram every ting in to a BIMBOX 4004 (Same as a Hammond 1590B except that it is 40mm deep). It was not that complicated. I used your layout and etched my own PCB. One thing I discovered tough was that I needed (at least one) hole for a PCB fixture. At the top end of the PCB I used double-coated adhesive tape to secure the PCB to the flat backside of the “In” and “drive” pots, but at the other end I needed a hole to fixate the PCB. The layout is tight and quite crowded (good design job I think). To accomplice this I drilled a 4,5 mm hole in the only area I found that was big enough. This was between R28, C1,C15, Rev_Bias Trim. As a result you will cut the trace going from “Input_2” to C1. This I solved by drilling a new hole close to C1 and solder the wire there instead. If you have the time I think it would be nice to have a pad there just in case someone like me shuld have the same idée. Of cause one can always cut the PCB with more space around the traces to fit holes in each corner but in my case I have only 3 mm in length and 2 mm in with to play with to get the PCB to fit within this box together with the rest of the stuff.

I will send you pictures of my build as soon as my wife gets back from here holiday with our digital camera.

Solderman

]]> By: gaussmarkov http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-777 gaussmarkov Sat, 31 May 2008 22:17:08 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-777 <p>absolutely you can use different tanks! the basic issue is getting input and output impedances that work with the existing component values. :cool:</p> absolutely you can use different tanks! the basic issue is getting input and output impedances that work with the existing component values. :cool:

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