Search found 448 matches

by JHS
26 Apr 2010, 17:15
Forum: Amplifiers
Topic: JCM800 as preamp
Replies: 12
Views: 6926

Re: JCM800 as preamp

I recommend to run Marshall on 11 with your fav. 4x12" and to use a H&K Red Box 4 or similar device for sending the output signal to the mixing console and/or another poweramp.

JHS
by JHS
20 Mar 2010, 11:25
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Ibanez - TS-9DX Turbo Tube Screamer [schematic]
Replies: 52
Views: 37853

Re: TS9-DX schematic ? [schematic]

Just a stock TS with switchable Cs on the R/C-network and switchable FB-loop clippers. Stock TS9DX: the 4.7k R is unchanged in all modes TS9-mode: 0.047nF+2 Si-diodes +mode: 0.22nF +4 Si-diodes hot-mode: 1.0nF+2 red LED+470kin parallel with the LEDs (I'm, not sure about this, 'cos I've seen a DX wit...
by JHS
21 Jan 2010, 16:48
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Proco - Brat
Replies: 37
Views: 15612

Re: Proco - Brat

A basic BRAT-schem can be found on this site.

http://www.happybob.com/rstrand/rat/rat_versions.htm

JHS
by JHS
19 Sep 2009, 18:50
Forum: Boutique Stompboxes dissected...
Topic: Okko - Diablo Boost+ (goop pics!!) [traced]
Replies: 146
Views: 84635

Re: Okko - Diablo Boost+ (goop pics!!) [traced]

The newer D. has the charge pump circuit, the older didn't and the same with more drive feature. Any CP circuit (from the Centaur or other FX) can be added in front of the BIAS devider. I would drop the more drive circuit, IMHO there's no need for it and for me it's overkill in this circuit. Catelin...
by JHS
09 Sep 2009, 20:22
Forum: Boutique Stompboxes dissected...
Topic: Lovepedal - Eternity [traced]
Replies: 381
Views: 119884

Re: Lovepedal - Eternity [traced]

The E. is a bland TS clone with a similar sounds. IMHO sounds best paired with Fender BF amps and Fender vintage guitars. Every TS-mods can be performed on the E., so it should be no problem to reduce gain and midrange to personal taste. You will get this open sound by cranking the amp to the verge ...
by JHS
06 Aug 2009, 09:08
Forum: Boutique Stompboxes dissected...
Topic: Barber - Direct Drive [traced]
Replies: 32
Views: 11071

Re: Barber - Direct Drive [traced]

The newer DD has basicly the same circuit layout as the LTD. Take the LTD-schem and replace the section between the opamps halfs with a hardclipper wired to Vref and a tone control similar to the RAT and you have 98% of the DD. Some Rs and Cs have slightly different values, but with those gutshots t...
by JHS
24 Jul 2009, 10:03
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Vox - SATCHURATOR pedal
Replies: 107
Views: 52821

Re: New Vox SATCHURATOR pedal

Switching is done via SN74HCT74 (like in some other FX).
BTW: Someone elsewhere claimed that it's a 1:1 copy of the T.C.J. "Gristle King".

JHS
by JHS
22 Apr 2009, 09:57
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Ibanez - SD-9 Sonic Distortion [schematic]
Replies: 99
Views: 59481

Re: Ibanez - SD9 ( Sonic Distortion ) [schematic]

In the SD-9 a lot of headroom is killed by the switching circuit. Furthermore the flip-flop softens the tone. If you build a SD clone from the schems floating on the web it will sound different, harder with more headroom. Compared to other 4558 the JRC4558D adds mids and compression to the tone and ...
by JHS
22 Apr 2009, 09:46
Forum: Amplifiers
Topic: What's the point of a tube rectifier in Class-A amps?
Replies: 23
Views: 5144

Re: What's the point of a tube rectifier in Class-A amps?

In a small class A amp (like Champ, Princeton") a GZ34 tube rectifier will not alter the tone or imply any "sag", 'cos the rectifier tube will always deliver the current needed w/o any voltage drop. If a Si-rectifier alters the tone in such amps, the reason is that it raises the DC supply voltage a ...
by JHS
16 Apr 2009, 16:32
Forum: Resistors
Topic: Carbon Composite Mojo?
Replies: 8
Views: 4765

Re: Carbon Composite Mojo?

True... but can you hear a difference between 0.12dB and -0.16dB :wink:[/quote] You can hear a difference in sound if a LP guitar is wired old or new style. In theory there should be no difference, you can't measure different values, but you can hear that tone nuances and timbre are different. A pia...
by JHS
16 Apr 2009, 07:40
Forum: Resistors
Topic: Carbon Composite Mojo?
Replies: 8
Views: 4765

Re: Carbon Composite Mojo?

There's a simple formula for caps ans resistors in audio stuff: different material = different sound No mojo, just a matter of personal taste. Often you find CCs in military and industrial stuff. Due to vibrations the boards are stressed a lot and CCs are not as fragile as other Rs and won't fail un...
by JHS
02 Apr 2009, 23:12
Forum: Boutique Stompboxes dissected...
Topic: Banzai - Cold fusion (guts)
Replies: 35
Views: 6206

Re: Gut shots: Banzai Cold Fusion CF-2 (Klon Centaur Clone?)

Yes folks, it's a Centaur-clone.
A bit deeper voiced and slightly more rude than the C. Only very few parts are a bit differnt.

JHS
by JHS
12 Feb 2009, 16:26
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Danelectro - CO-1 - Cool Cat Drive [schematic]
Replies: 88
Views: 37035

Re: Danelectro - Drive ( Cool Cat ) [schematic]

The forward voltage of a diode used as a clipper does not tell anything about the clipping or the sound. Diodes with a forward voltages of app. 0,6V can produce really different distortion. The protection diode in a BS170 for ex. produce a harder/rougher sound when used as a clipping diode compared ...
by JHS
24 Jan 2009, 17:10
Forum: Circuit Blocks
Topic: LED Clipping Colors
Replies: 6
Views: 4337

Re: LED Clipping Colors

Buy some and check them. Depending on the manufacturer and LED-diameter even red LEDs can sound quite different.
JHS
by JHS
09 Jan 2009, 09:15
Forum: Boutique Stompboxes dissected...
Topic: Sobbat - DB-1 Drivebreaker
Replies: 46
Views: 9205

Re: Sobbat DB-1 Drivebreaker...........

A schem of the DB can be found here: http://forum.musikding.de
JHS
by JHS
07 Jan 2009, 08:56
Forum: Boutique Stompboxes dissected...
Topic: Analogman - Sun Face (Sunface) [traced]
Replies: 140
Views: 29634

Re: Analogman - Sun Face (Sunface) [traced]

Lower hFE = less fuzz
Hfe of the 2nd trannie is not that important (60 -150). If the bias is set right for this trannie a FF will clean up immediately.

JHS
by JHS
06 Jan 2009, 08:58
Forum: Pimp-My-Cheap-Pedal
Topic: Bad Monkey (especially the mixer-out-section) schematic?
Replies: 13
Views: 8921

Re: Bad Monkey (especially the mixer-out-section) schematic?

A schem for the BM can be found via google or other machines.It's already published on the web but I've forgotten on which site. I think it was on blabla TGP-forum but Im, not shure.
JHS
by JHS
06 Jan 2009, 08:49
Forum: Boutique Stompboxes dissected...
Topic: HAO - Rust Driver [traced]
Replies: 134
Views: 36671

Re: HAO - Rust Driver [traced]

On vintage FX with loose or none filtering the effect of the diode ic clearly audible, sometimes more muddy, sometimes a stiffer tone. Very few 'til zero difference in tone if the bias-divider is well filtered or the bias is generated via IC. If the FX is powered by battery the effect is more audibl...
by JHS
06 Jan 2009, 08:35
Forum: Boutique Stompboxes dissected...
Topic: NIck Greer - Green Giant
Replies: 10
Views: 2546

Re: NIck Greer - Green Giant

So far my anlalysis for the NG stuff: Sonic boom = stock LBP-1 with 5088, Sonic boom + = above with guitar tone control at the output Black Fuzz = sonic boom with 2 914 clipping diodes at the output. Black Fuzz custom = BF with switchable guitar tone control at the output Green Giant = Black Fuzz bu...