Anybody know any mods for Radial Plexitube pedals?

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Gone_Shootin
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Location: Iowa, USA

Anybody know any mods for Radial Plexitube pedals?

Post by Gone_Shootin » Sun Nov 18, 2012 10:26 am

I have a Radial Plexitube pedal that I occasionally use in front of my little amps. It does do the Plexi thing, but the gain is only useable up to a little past halfway. Past that and it more or less sounds like somebody crumpling up wax paper......very annoying.

So I was wondering if anybody has any tube recommendations or know of any mods to make the higher gain settings useable.

Thanks!
Amps:
Marshall JVM 410H (Blackface Clean, Plexi Cap, 1959 Crunch, JCM800 OD1, Recto OD2, One Wire, Negative Feedback, Mid Shift on Clean, OD1 & OD2)
Splawn Pro Mod
Mesa Triple Rectifier
Fender Supersonic 60 head
Peavey: VTM120, Vypyr 15

Cabinets:
Marshall 1960A w/Celestion G12T-75s & V30s
Splawn straight 4x12 w/ Eminence Governors and Man O Wars
Mesa Rectifier Slant 4x12 w/V30s
Avatar Vintage 4x12 W/Celestion G12T-75s & V30s
homebuilt 1X15 w/Yamaha PA speaker

Guitars:
Gibson Explorer
Jackson: USA SL1, USA KV2, 2 MIJ DK2s, MIJ DK2S Sustainiac, JS King V, Performer Dinky
MIK Epiphone Les Paul Custom
Fender MIM Telecaster
Ibanez: RG320, RG321MH
Samick:D-7-CE, D-5-12
Peavey Milestone V Bass

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Bam Bam
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Location: Mesa, Arizona

Re: Anybody know any mods for Radial Plexitube pedals?

Post by Bam Bam » Sat Nov 24, 2012 10:45 am

I don't have any hands-on experience with this pedal, but if I had one and had the same question as you, I'd certainly try a lower gain tube in it. I see that the stock tube is a 12AX7. How about trying a 5751? It has a 70% gain factor compared to a 12AX7. Or possibly a 12AT7 (60%). That (theoretically) should give you more usable gain on the knob.

Bam
Guitars: 2012 Ibanez 25th Anniversary RG3 w/Dimarzio D-Activator/Air Norton S, 2005 Charvel USA Custom Shop Pointy Head Reissue w/80's Jackson J-95/Duncan '59, 2010 Charvel Pro Mod San Dimas Style 1-2H w/Custom Custom/Jazz (was JB/'59 stock), 1987 Kramer Aerostar ZX30 w/Dimarzio Super Distortion/EMG Selects (passive single-coils)
Amps: JVM 410H (2007), EVH 5150III 50w head (2011), Peavey Series 2600 Mark III
Cabs: Avatar Contemporary 4x12 loaded with Hellatone 60s (Vintage 30s), Early 80's Peavey 2x12 loaded with Eminence Governors
Pedals: ISP Decimator, Morley Mark Tremonti Wah, Fulltone OCD (4th gen), Digitech Whammy (5th gen), MXR 10-Band EQ, Boss DD-3 Delay, Boss BF-3 Flanger, Korg Pitch Black Tuner, others

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Gone_Shootin
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Joined: Sat Oct 20, 2012 10:27 am
Location: Iowa, USA

Re: Anybody know any mods for Radial Plexitube pedals?

Post by Gone_Shootin » Sat Nov 24, 2012 5:54 pm

The problem is, from what I've been able to find out, is that most of the distortion happens in the solid state part of the pedal, and the tube just more or less "colors" the sound. Apparently Radial did this to skirt a patent somebody else has on using 12AX7s for distortion in a pedal.

And I don't necessarily want to reduce the gain, I just want it to be useful.
Amps:
Marshall JVM 410H (Blackface Clean, Plexi Cap, 1959 Crunch, JCM800 OD1, Recto OD2, One Wire, Negative Feedback, Mid Shift on Clean, OD1 & OD2)
Splawn Pro Mod
Mesa Triple Rectifier
Fender Supersonic 60 head
Peavey: VTM120, Vypyr 15

Cabinets:
Marshall 1960A w/Celestion G12T-75s & V30s
Splawn straight 4x12 w/ Eminence Governors and Man O Wars
Mesa Rectifier Slant 4x12 w/V30s
Avatar Vintage 4x12 W/Celestion G12T-75s & V30s
homebuilt 1X15 w/Yamaha PA speaker

Guitars:
Gibson Explorer
Jackson: USA SL1, USA KV2, 2 MIJ DK2s, MIJ DK2S Sustainiac, JS King V, Performer Dinky
MIK Epiphone Les Paul Custom
Fender MIM Telecaster
Ibanez: RG320, RG321MH
Samick:D-7-CE, D-5-12
Peavey Milestone V Bass

okgb
Club Circuit
Posts: 510
Joined: Fri Apr 29, 2011 8:50 am
Location: The Great White North-Winnipeg

Re: Anybody know any mods for Radial Plexitube pedals?

Post by okgb » Tue Jun 13, 2017 10:19 am

I believe the tube stage is a cathode follower and produces No gain, I agree not a bad sounding pedal and their later series which had no tube at all
sounded good and similar as well. still you'd think there's a spot to get less gain from the opamps or cut the signal down
as this is an old thread , I presumed you moved on ?
Amps JVM 410H [too many mods to mention ] '73 50w lead, 70's vibrochamp , mesa mkIII U.S. Vox pacemaker
Rock , pop rock & Blues style's mainly played
Gtr's Musicanman " Luke " wolfgang [ carved top w pearly gates ] Hondo lazer , Warmoth strat
Fx t.c. 2290 , Lexicon tc verb
Pedals tbone plexi , t.c. chorus , various handmade & usual suspects t.s. , zen , CB wah ..........

User avatar
Gone_Shootin
Private Parties
Posts: 178
Joined: Sat Oct 20, 2012 10:27 am
Location: Iowa, USA

Re: Anybody know any mods for Radial Plexitube pedals?

Post by Gone_Shootin » Tue Jun 13, 2017 10:34 am

Yeah, I got rid of it 3 or 4 years ago. Thanks for the reply, though. :)
Amps:
Marshall JVM 410H (Blackface Clean, Plexi Cap, 1959 Crunch, JCM800 OD1, Recto OD2, One Wire, Negative Feedback, Mid Shift on Clean, OD1 & OD2)
Splawn Pro Mod
Mesa Triple Rectifier
Fender Supersonic 60 head
Peavey: VTM120, Vypyr 15

Cabinets:
Marshall 1960A w/Celestion G12T-75s & V30s
Splawn straight 4x12 w/ Eminence Governors and Man O Wars
Mesa Rectifier Slant 4x12 w/V30s
Avatar Vintage 4x12 W/Celestion G12T-75s & V30s
homebuilt 1X15 w/Yamaha PA speaker

Guitars:
Gibson Explorer
Jackson: USA SL1, USA KV2, 2 MIJ DK2s, MIJ DK2S Sustainiac, JS King V, Performer Dinky
MIK Epiphone Les Paul Custom
Fender MIM Telecaster
Ibanez: RG320, RG321MH
Samick:D-7-CE, D-5-12
Peavey Milestone V Bass

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