Comments on: Spring Reverb http://gaussmarkov.net/wordpress/circuits/spring-reverb/ guitar stompboxes and electronics Thu, 17 May 2012 02:09:15 -0700 hourly 1 http://wordpress.org/?v=3.1 By: Jukka http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1569 Jukka Sat, 12 Nov 2011 15:24:00 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1569 Can you send me Spring Reverb Eagle PCB-files? Can you send me Spring Reverb Eagle PCB-files?

]]> By: Springer http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1538 Springer Mon, 18 Jul 2011 18:12:48 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1538 Hi I have a Fender Stage 185 Instrument Amp - fitted with a short Accutronics 8EB2C1B Reverb Tank. Question is would it be safe or will I damage the amp/reverb unit, if I switched in a longer reverb tank, namely an Accutronics 4DB2C1D which I have recently come in to the possession of. Thanks for assistance Hi

I have a Fender Stage 185 Instrument Amp – fitted with a short Accutronics 8EB2C1B Reverb Tank. Question is would it be safe or will I damage the amp/reverb unit, if I switched in a longer reverb tank, namely an Accutronics 4DB2C1D which I have recently come in to the possession of.

Thanks for assistance

]]> By: Fab http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1527 Fab Mon, 13 Jun 2011 13:37:18 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1527 hi! did anyone have any white noise coming from the recovery stage? i cant use this effects at higher volume with an amplifier (for guitar or bass)... im sure that the noise come from the 2n3906 collector, the pin that goes to pot...i tested it with my audio probe, before the transistor i havent find noise! is this normal? once i picked up an FM station... :( hi! did anyone have any white noise coming from the recovery stage? i cant use this effects at higher volume with an amplifier (for guitar or bass)… im sure that the noise come from the 2n3906 collector, the pin that goes to pot…i tested it with my audio probe, before the transistor i havent find noise!
is this normal?
once i picked up an FM station… :(

]]> By: derDon http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1525 derDon Sat, 04 Jun 2011 11:52:12 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1525 Hi, I'm just about to build one. Made a few changes, to acommodate my parts bin, and added a three-way Low Cut-Switch by adding 2 different pulldown resistors on the output of the reverb recovery amp with a 3-way spdt. Then I got the 160 Hz when the switch is in the mid position , and two other cutoff points on either side. I'm gonny start with 380 Hz and 560 Hz first (that's 4.7k and 2.7k, I think). Is there any reason why the input and recovery amps wouldn't work as npn stages with a 2N3904? Also, I have a small power transformer lying around that I want to use on this. It measures 1.2 kOhms on the primary and 2 ohms on the secondary. Could this actually work? Great circuit, and great site! Solder on, DerDon Hi,

I’m just about to build one. Made a few changes, to acommodate my parts bin, and added a three-way Low Cut-Switch by adding 2 different pulldown resistors on the output of the reverb recovery amp with a 3-way spdt. Then I got the 160 Hz when the switch is in the mid position , and two other cutoff points on either side. I’m gonny start with 380 Hz and 560 Hz first (that’s 4.7k and 2.7k, I think). Is there any reason why the input and recovery amps wouldn’t work as npn stages with a 2N3904?
Also, I have a small power transformer
lying around that I want to use on this. It measures 1.2 kOhms on the primary and 2 ohms on the secondary. Could this actually work?
Great circuit, and great site!

Solder on,

DerDon

]]> By: Bernard http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1522 Bernard Sun, 22 May 2011 18:11:51 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1522 That´s quite interesting, I am not alone with my built in an alamo reverb unit by OC electronics type 51 reverb tank. Unfortunately it is broken and very hardly to find. Do you know what other reverb, f.ex. an Accoutronics will fit on my OC electronics Type 51? My best wishes, Bernard That´s quite interesting, I am not alone with my built in an alamo reverb unit by OC electronics type 51 reverb tank.
Unfortunately it is broken and very hardly to find. Do you know what other reverb, f.ex. an Accoutronics will fit on my OC electronics Type 51? My best wishes, Bernard

]]> By: george http://gaussmarkov.net/wordpress/circuits/spring-reverb/comment-page-1/#comment-1426 george Sun, 19 Sep 2010 10:57:19 +0000 http://gaussmarkov.net/wordpress/circuits/spring-reverb/#comment-1426 Yes you can build it without the 4011. I have built it once without it but my second version is with the clipping leds and it's pretty cool. Also I used a 4EB3C1B pan without the matching transformer and I have a nice warm reverb. Now, I'm dealing with the boominess that this circuit have. Any advice from anyone. With a careful transistor bias it's better but I need better results. Cheers, G Yes you can build it without the 4011. I have built it once without it but my second version is with the clipping leds and it’s pretty cool. Also I used a 4EB3C1B pan without the matching transformer and I have a nice warm reverb.
Now, I’m dealing with the boominess that this circuit have. Any advice from anyone. With a careful transistor bias it’s better but I need better results.
Cheers, G

]]> 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?

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