Rhoidum Electronics

MODS

ProCo RAT All Mods Built in One single Toggle Switch

As mentioned to some customers who contacted recently, we just have finished with our all mods. Send us your pedals!



Three clipping options, considering those guitar players who liked RAT clipping distortion and tone a bit less harshe, but still a little more headroom for playing with Marshall amps, like the Turbo RAT, but smoother, and smother tone than vintage classic RAT with silicon clipping diodes, and adding you dirty RAT with germanium diodes. All in one single toggle switch.



After modding the RAT to the different and most popular versions, decided to use a switch on-on-on for setting the three mods in one single toogle switch. Perharps, the Turbo option is quite different than original Turbo RAT, we modified this option for those guitar players who specially don't play with much distortion in their rig, adding a smoother tone than silicon clipping, but still having more headroom for more Marshall tones.

Previous experiences lead us to this All in One Mod with single toggle switch, and swapped chip for installing a genuine Motorola LM308N in 8 pin IC socket. Replacing the OpAmp make RAT 2 less muddy and having a better response at high frequencies when using like overdrive. A smoother distortion and less fatty sound. 


ProCo RAT 3 version mod Original ProCo RAT w/ Motorola LM308N 



Modifying ProCo Rat version 3 made in China. Order received by Douglas Tully, who contacted us by email:

 
This Rat had a defective Input jack chassis socket, which snapped off with washer and nut. This order is special, because it's a service door to door, now we are not in Kentish Town, but we didn't mind to pass to collect this pedal and visit our friends in the area by the way, thanks Doug!

Found this RAT been previously manipulated, not sure if it's a factory issue, or just a repairing after purchased, but the PCB show some signs of flux and residues from the solder.

Our modification consist on replacing all electrolytic capacitors along the guitar signal path. Upgrading the current chip Texas Instruments OP07DP to the original Motorola LM308N. Also, replacing the factory silicon diodes by vintage 70's german diodes from our stock.

The standard OP07DP of RAT 2 is a bit more harsh sound tham the genuine Motorola LM308N chip. Replacing the OpAmp make RAT 2 less muddy and having a better response at high frequencies when using like overdrive. A smoother distortion and less fatty sound.

Guitar Demo Boss SD1 Mod with switch for symmetrical (double side silicon clipping diodes) / asymmetrical (LED clipping) plus NEC c4558c Japan Opamp 


Exclusive Boutique Boss SD1 pedal modded with a switch for symmetrical (double sided silicon diodes clipping distortion) / asymmetrical (LED clipping) plus rare chip NEC c4558c Opamp installed with 8 pins socket replacing JRC4558DD, audio grade capacitors replacing with Mullard mustard, audio grade Mylar film and Mullard Tropical fish capacitors and Vishay Roederstein electrolytic capacitors and metal film resistors for an exclusive Monster SD1 MOD.
Just in case, you desire to experiment with different versions and sounds of this circuits, been installed a 8 pins IC socket to test diverse chips and their different sounds on this pedal, so it includes a lot of several integrated circuits, chip samples as it original chip JRC4558DD, early Boss OD1 and Ibanez ts808 rare versions of the chip NEC c4558c and TL4558P, and standard TS808 and TS9 versiĆ³n of the chip JRC 4558D.


Guitar Demo Mod for BOSS SD1 SD 808 mod vs ts808 (with double sided silicon symmetrical vs ts808)


Exclusive Boutique Boss SD1 modded to TS808 with a symmetrical (vintage silicon 1N4148 clipping diodes) and early TS808 chip NEC c4558c Opamp installed with 8 pins socket replacing JRC4558DD, with audio grade Mylar capacitor added to the clipping diodes circuit as original Ibanez TS808 diagram, metal film resistors and vintage audio grade Philips Mullard Mustard and electrolytic capacitors for an exclusive BOSS SD1 Super Overdrive Monster MOD to ibanez TS808 early Japan version.


Just in case, you desire to experiment with the different versions of the chip for ibanez TS808, a 8 pins IC socket built in PCB board been installed, so you can swap different 8 pins opamp integrated circuits very easy.

BOSS SD1 Moster SD808 mod to original Japan Ibanez TS808 with symmetrical silicone clipping diodes. Same spec than TS808 up to halfway of the Drive knob, after half of the drive knob position an amazing overdrive response with treble boost as BOSS OD1, but still symmetrical overdrive.

Boss DS1 Distortion Modded to DS808 more Gain Symm/Asymm Distortion D#

Demo Boss DS1 Distortion to DS808 more Gain more Distortion Symmetrical/Asymmetrical silicone/led diodes clipping distortion 




This Boss DS1 Distortion Monster, mod to DS808 more Gain more Distortion, treble booster with better input transistor buffer features and output buffer modified to ibanez TS808 output, improving audio signal response and harmonics, more of a tonal range to play guitar, and selector switch for symmetrical and asymmetrical clipping distortion.


A real Monster pedal individually hand built in London for Dave Sharp, Beloved Alice. 

This modification carried out on last November 2018 in London borough of Camden been sold to Dave Sharp. There are few improvements in this order. They been developed individually for other pedals. 

Boss ds1 ds808 monster all mods ds808 vs boss ds1 japan early 80s by Rhodium Electronics



Finally, completed a new series of modifications for BOSS DS1 Distortion. Previously successfully modded BOSS SD1 Super Overdrive to SD808, and after sold a few units having excellent feedbacks, decided to upgrade the DS1 distortion circuit, with more of a tonal range, more headroom, more gain, more input signal and output modded to TS808. Symmertrical and Asymmetrical distortions, with germanium, silicon, and LED diodes. Every pedal is a challenge, due all our mods keep differences in tones to make them exclusives.

Developing unique modifications, gives an exclusivity to the guitarrist. Offering your demos, tracks and records, an amazing tones and great sounds.

Thanks Dave, contacted us recently, after playing with one of our SD808 Double Sided Silicom Symmetrical SD1 Super Overdrive. Therefore, it's needed to develop a new family of BOSS DS1 Distortion DS808 mods for achieving a new sound, colours and tones.

BOSS DS1 Distortion DS808 D# Symmetrical/Asymmetrical Distortion. Artist: Dave Sharp. 



Boss DS1 Distortion Monster DS808 Germanium Marshall JCM More Gain TS808 Output


Boss DS1 Distortion mod Monster DS808 with germanium diodes symmetrical distortion, much more gain, Marshall JCM tones, input transistor buffer and treble boost, roll-off frequency for more of a tonal range and output buffer for TS808.

BOSS DS1 DS808 Distortion Mod TS808 Output Double Silicon Symmetrical Distortion


Modification includes much more headroom, output buffer upgraded to TS808, with symmetrical double sided silicon diodes distortion, much more gain, treble booster, frequency roll-off with more of a tonal range, and Marshall tones. Modified Input Buffer and Transistor Booster circuit, Op-Amp Gain stage, tone level and Output Buffer.

BOSS DS1 DS808 Distortion Mod TS808 Output Led Symmetrical Distortion.



Modification includes much more headroom, output buffer upgraded to TS808, with symmetrical led diode distortion, much more gain, treble booster, frequency roll-off changed with more of a tonal range, and Marshall tones.

Ibanez TS9 Tube Screamer TS808 Mod Symm/Asymmetrical Two Stacked IC Opamps early RC4558P

Exclusive Ibanez TS9 Tube Screamer TS808 mod with two stacked IC Opamps early RC4558P chip on socket, selection switch for symmetrical (double sided silicon diode clipping) / asymmetrical (leds) overdrive.



This TS808 mod offers a warmer signal, much more headroom, upgrades of non-polarised capacitors tough to audio grade, more open bandwidth, but still active tone. Much more headroom and less noise with two stacked early chip RC4558P. 

More versatility, as asymmetrical drive circuit was patented for Boss OD1. All in one mod ibanez tube creamer TS9, exclusive boutique pedal hand crafted in London.

Demo Ibanez TS9 Tube Screamer Bi-Turbo Mod vs TS808 Japan vs early TS9 Japan


Bespoke Analog FX designs to component level, Integrates Circuits, PCB designs and Hand Built Tube Preamps. Customising and Tailoiring Guitar and Tone, Hot Rod Amp Optimisation, Bespoke Effect Pedal Mods and Modifications.

Exclusive Ibanez TS9 Tube Screamer TS808 mod Bi-Turbo with early NEC c4558c, Japan version, integrated circuit built in 8-pin socket, selection switch for symmetrical (double sided silicon diode clipping) / asymmetrical (leds) overdrive.


This TS808 Bi-Turbo mod offers a warmer signal, much more headroom, upgrades of non-polarised capacitors tough to audio grade, more open bandwidth, but still active tone. Much more gain. 

More vintage sound with early chip NEC c4558c Japan. More versatility, as asymmetrical drive circuit was patented for Boss OD1. All in one mod ibanez tube creamer TS9, exclusive boutique pedal hand crafted in London.


RHODIUM ELECTRONICS
Camden Town 
NW1
London