ao link
Filter content by area of interest
Amps
Boost and Overdrive
Delay
Distortion
Fuzz
Guitars
Modulation
Pitch
Reverb
Utility
All
All

Pettyjohn Electronics revives its Core Series - now 'Core X' in larger 1590BB style Raw and Engraved enclosures with an extra 5th Tilt-EQ knob

Blues Breaker Style OverdriveBoostBoost and OverdriveDistortionDriveFuzzHarmonic OverdriveKlone and Transparent OverdriveODR Style OverdriveOverdrivePettyjohn ElectronicsTubescreamer Style Overdrive+-
2026-GPX-Pettyjohn-Core-X-Series-700.jpg

I recall the original Core Series very well - and picked up those 4 original compacts - per the below original range visual. You had the Edge, ODI, Rail, and ROUS (per bottom row of visual) - where 3 of those have now been revived and enhanced.

 

Pettyjohn then did a number of additional very limited small batch custom compact editions - which covered most of the same territory as these 11 new editions. I feel a couple of these might be brand new - certainly the Moss X Fuzz. ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

2026 May Pedal-Chain Update - Episode V - Giga-Hoard Modulated Fuzz'n'Drive Board

Asheville Music ToolsBig Muff Style FuzzBlack MountainBlues Breaker Style OverdriveBoostBoost and OverdriveCaroline Guitar CompanyChorus and VibratoColortone PedalsDelayDigital DelayDigital ReverbDistortionDriveDual-DriveDumble Style OverdriveEmpress EffectsEventideExpressionFuzzFuzz Face Style FuzzFuzz-Drive and FuzzstortionGamechanger AudioGigaheartsGranular DelayHarmonic OverdriveHoly Island AudioHungry Robot EffectsJSA EffectsKlone and Transparent OverdriveMarshall Style DistortionMetal DistortionModulated FuzzModulationModulation WorkstationMulti-DriveMulti-FXMulti-GainOCD Style OverdriveOctave FuzzOctaverOddball DelayOddball FuzzOddball ModulationODR Style OverdriveOpAmp FuzzOscillating FuzzOverdriveOverkill EffectsPedal ChainPhaserPitch-ShiftingPreAmpReverbReverse DelayRockwrightRotary SpeakerSilicon FuzzSuper-Fuzz StyleSwellThorpyFXTimmyTremoloTubescreamer Style OverdriveTweed Style OverdriveUni-Vibe and VibeUtility+-
2026-May--Pedal-Chain-700.jpg

May has been a little bit of strange month - lots of delays really, and waiting for pedals to land.

As inevitably happens most months - much was delayed this month, and I was unable to complete some of the larger articles - they will need to wait until next month, there’s certainly lots of projects in progress. Where new and imminent arrivals kind of scuppered several intended projects - hopefully they can be completed in June.

The first event I’m attending this month is tomorrow - as a micropub ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

2026-GPX-JAM-Pedals-Tubedreamer-MK2-700.jpg

So the JAM Pedals TS808 take gets another spin around - moving the High Gain option from toggle-switch to Second Footswitch, while we also get a new potent ’No-Diode’ clipping mode - which is a little louder and punchier.

 

Controls - Level, Gain, Tone, Clipping : Asymmetrical / No-Diode, High Gain Footswitch, Engage/Bypass Footswitch.

 

I’m sure most don’t necessarily think they need another Tube Screamer variant, I myself have several already. While this is an undeniably cool and handy ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

2026-GPX-JSA-Effects-LNS-Overdrive-OD-1-Main-700.jpg

I only discovered the existence of the LNS Overdrive pedal a day or two before the recent Leeds Pedal Show - which both I and JSA Effects were attending. I had read that Simon had managed to get his hands on 3 super rare original NOS RC3403 quad opamp chips - where his mods included really unique active Treble and Bass controls, along with improved / louder output.

 

I was determined to arrive at Leeds super early to be in with a chance of snagging one of these. In fact the other 2 had been ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

Drunk Beaver Pedal Drop #38 - the Voznesensk Dino Drive revives their T-Rex pedal, which in turn was based on the long-discontinued Dinosaural Tube Bender Pedal

BoostBoost and OverdriveDriveDrunk BeaverFuzzOverdriveSilicon FuzzTone Bender Style FuzzTubescreamer Style Overdrive+-
2026-GPX-Drunk-Beaver-Voznesensk-Dino-Drive-700.jpg

Back in 2003, Dan Coggin’s Dinosaural created a silicon transistor circuit which sort of combined elements of a Tube Sceamer and a Tone Bender - and hence the ’Tube Bender’ moniker. I believe the earliest models were in Silver sort of 1590BB style enclosures, and the later ones were in Black.

 

From 2003-2007 a total of around 150 were made. And in the intervening years several takes on that circuit emerged - including the Aion FX Wyvern in 2020, and the Drunk Beaver T-Rex a year later - ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

Pettyjohn Electronics' Spring Sale ends on 15th of April - only a couple more days to get your 15/20% discount on these excellent 3rd Generation Pedals

Blues Breaker Style OverdriveBoostBoost and OverdriveBufferDistortionEQHarmonic OverdriveKlone and Transparent OverdriveMarshall Style DistortionOverdrivePettyjohn ElectronicsPreAmpTubescreamer Style OverdriveUtilityVox Style Distortion+-
2026-GPX-Pettyjohn-Quad-700.jpg

I got heavily involved with Pettyjohn / Stephen during their MKII Era - which saw further consolidation of the main ’Foundry Series’, and the introduction of a more affordable, more compact ’Core Series’.

 

Over that period I acquired 4 of each series - including all of the Core ones. It took me a while to understand the nature of how Stephen works - which is always part custom-shop - and there are always additional custom Mods on offer for each pedal - which makes acquisitions more ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

The Full Range of Tru-Fi Mini Pedals is now available at Joe's Pedals in the UK

BoostBoost and OverdriveDistortionFuzzFuzz Face Style FuzzGermanium FuzzJoesPedals.comKlone and Transparent OverdriveModulationOpAmp FuzzOverdriveRat Style FuzzSilicon FuzzSuper-Fuzz StyleTremoloTru-Fi Guitar EffectsTubescreamer Style Overdrive+-
2026-GPX-Tru-Fi-Minis--x-Joes-Pedals-700.jpg

I initially covered this subject in mid-January - where I announced the arrival of the Tru-Fi Minis. 5 were initially made available, but at my time of coverage only 3 had reached the UK. Since then Teddy has released 3 more variants - and now 8 Minis in total have been released.


All 8 Mini Editions are now at Joe’s Pedals in the UK - priced at £199 each, where the original Tru-Fi USA price is $199 - all very fair.

 

Each of the 8 pedals are equivalent or better than the original larger size...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

2026 March Pedal-Chain Update - Episode III - Giga-Muff Multiplier

Big Muff Style FuzzBoostChorus and VibratoDazatronyxDecades PedalsDelayDigital ReverbDistortionDouble TrackingDriveDrunk BeaverElectro-HarmonixEmpty Head EffectsEnvelope Filter and Auto WahFlangerFredric EffectsFulltone EffectsFuzzFuzz Face Style FuzzFuzz-Drive and FuzzstortionGermanium FuzzGigaheartsHagerman AmplificationHarmonic OverdriveHello Sailor EffectsKlone and Transparent OverdriveMarshall Style DistortionModulationMozztronicsMulti-DriveNoise GateNoise Maker MarketOCD Style OverdriveOctave FuzzOddball FuzzOpAmp FuzzPastFXPedal ChainRat Style FuzzRedSeven AmplificationReverbRhPf ElectronicsSilicon FuzzSuper-Fuzz StyleTone Bender Style FuzzTubescreamer Style OverdriveUtilityVox Style DistortionZorg Effects+-
2026-March--Pedal-Chain-700.jpg

After the quiet comfort of February, March unleashed an avalanched of work - both in terms of new releases and acquisitions, but especial in the field of Guitar and Pedal expos - where I attended 3 within a month - first The Birmingham Guitar Show at Cranmore Park, then the London Synth and Pedal Expo at Studio 9294, Hackney Wick - and then back to Birmingham for the Noise Maker Market at Centrala, Digbeth - all grand events.

I burned myself out a little this month, and came back willingly empty...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

Mozztronics' potent GD-1 Bone Breaker essentially ads several Mods to a core TS808 style voicing - to deliver OD-1, Guv'nor, OCD and AC30 tones

BoostBoost and OverdriveDriveMarshall Style DistortionMozztronicsMulti-DriveOCD Style OverdriveTubescreamer Style OverdriveVox Style Distortion+-
2026-GPX-Mozztronics-GD01-Bone-Breaker-Main-700.jpg

I was immediately attracted to this smart Multi-Drive when I came across it fairly recently - where different clipping mods significantly change the core character of the pedal. My favourite voicing is the Guv’nor one - which adds Red LED’s into the mix - for more gain and sustain, and a really punchy bottom end. That voicing sounds superb.

 

It’s a really decent standout voicing for sure - where I also really love the OD-1 Asymmetrical Clipping Diodes one, and the AC30 style one - which ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions

My second longest mission is now complete as I have 3 fantastic enhancements and evolutions of the OD-1 circuit and one intriguing adjacent

Best in ClassBoostBoost and OverdriveBossDrunk BeaveriStingorOverdrivePastFXPettyjohn ElectronicsTubescreamer Style Overdrive+-
2026-GPX-Boss-OD-1-Variants-700.jpg

If you read my recent PastFX OG-1 piece - you would know that I initially intended to pick up an original long-dash OD-1 with the very original 14-pin JRC3403 OpAmp onboard. There’s hardly any of those available in the wild - and typically they are battered and way over-priced. I had intended to get one and have it modified with an additional tone-stack - as I always felt that was a key element missing from the original, and one of the reasons for the greater success of the Ibanez TS808 Tube ...

Stefan KarlssonPopularCommentsRSS FeedContent Subscriptions
Content Subscriptions
Sign Up
Profile
Stefan Karlsson
Stefan Karlsson
Guitar Pedal X
News Navigation






















May31
































Waiting