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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  Electro Harmonix The Worm 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Electro Harmonix The Worm  (Read 6130 times)
Rattlehead
Posts: 160


Electro Harmonix The Worm
« on: March 06, 2007, 10:37:21 PM »

hi.
i just wondered if you think it is possible to make a footswitch to every mode in this pedal? (it has 4 modes and 1 footswitch)

http://www.musiciansfriend.com/product/ElectroHarmonix-The-Worm-Analog-MultiModulation-Effects-Pedal?sku=153322
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Meanderthal
Posts: 2273


John Parker


Re: Electro Harmonix The Worm
« Reply #1 on: March 06, 2007, 10:38:44 PM »

 Certainly, the only catch being where on the enclosure to locate them.
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I am not responsible for your imagination.
Rattlehead
Posts: 160


Re: Electro Harmonix The Worm
« Reply #2 on: March 06, 2007, 10:41:11 PM »

I think there's enough space between the footswitch on the left and the range knob.
has anyone here tried this pedal before?
does it worth the money?
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Barcode80
Posts: 2250


Patrick Johnson


Re: Electro Harmonix The Worm
« Reply #3 on: March 06, 2007, 11:06:07 PM »

decent pedal, but the autowah i expected more of an envelope filter from instead of just a boring set rate sweep. i just scored one for 30 bucks. i am hoping to find some more mods.
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Rattlehead
Posts: 160


Re: Electro Harmonix The Worm
« Reply #4 on: March 06, 2007, 11:09:40 PM »

how's the phaser?
and it's not really analog right?
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puretube
Posts: 7207


but, err, I`m not really here...


WWW
Re: Electro Harmonix The Worm
« Reply #5 on: March 07, 2007, 12:57:59 AM »

it would only be possible to "footswitch" between 2 modes,
but not between a selected mode and bypass.

it is a very analog circuit - 3stage optical phaser;
(but NOT public domain!).

"autowah" is an often mis-interpreted description;

the LFO modulation was the reason why this pedal was designed upon special request...
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pupina
Posts: 53


Re: Electro Harmonix The Worm
« Reply #6 on: March 07, 2007, 01:41:21 AM »

Another big problem of this pedal is the noise!!!!! It's noisy in every sound you choose....does anyone has fixed this prob?
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puretube
Posts: 7207


but, err, I`m not really here...


WWW
Re: Electro Harmonix The Worm
« Reply #7 on: March 07, 2007, 04:38:13 AM »

metalfilm resistors...
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Mark Hammer
Posts: 21971


WWW
Re: Electro Harmonix The Worm
« Reply #8 on: March 07, 2007, 06:52:40 AM »

Correct me if I'm wrong, Ton, but did the earliest version of the Worm not exist in tube form, before it turned ito a solid-state E-H product?

And just to clarify,
metalfilm resistors...
means that if you replace the 5% resistors currently in there with low noise metal film types, you'll get....lower noise!
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sir_modulus
Posts: 1176


Re: Electro Harmonix The Worm
« Reply #9 on: March 07, 2007, 07:12:38 AM »

I thought it was the the wahbrato?
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Mark Hammer
Posts: 21971


WWW
Re: Electro Harmonix The Worm
« Reply #10 on: March 07, 2007, 07:18:15 AM »

Precisely.
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Sweetalk
Posts: 151


Re: Electro Harmonix The Worm
« Reply #11 on: March 07, 2007, 08:17:15 AM »

I saw a review of this in the EHX DVD, it's nice.. I think it's some "all-you-can-get-from-an-optical-phaser"  icon_mrgreen . I'll be nice to add a Expression pedal to control the wah sweep, that i'll be much more usefull!!
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puretube
Posts: 7207


but, err, I`m not really here...


WWW
Re: Electro Harmonix The Worm
« Reply #12 on: March 07, 2007, 06:36:27 PM »

first, there was the TUBE-PHASER (TM):



therefrom the TUBE-VIBE derived:



the TUBE-VIBWAHTO:



the WAH-CASTER:
(actually a TUBE-CHORUS (TM) with built-in TUBE-TRON (TM) &
built-in 2 x 12W pure tube stereo power amp with stereo-spreading...)


(dual- aka: "Bi-" LFO with the "On-LED/Off-LED" indicator trick to Vb & to gnd...  icon_wink)

as well as  the TUBE-WAHBRATO:




at that point, a man (Ted Pierce, demo-guitarist for E-H @ Frankfurt MusikMesse 1998) comes in
and plays the Tube-Wahbrato...
...mentions he needs something like that, with batteries, for street-music...

he especially wants a subtle, cyclicly modulated Wah...

subtle? - OK, leave out 3 of the 6 tube-stages, replace (EMULATE  icon_razz) the tubes with transistors,
and add an extra knob to control the resonance



next: M.M. emails he`d love to see such a pedal reduced to 3 pots so it`d fit into a BMP box... :



("Resonance" & "Dry-Wet" set to fixed values, and switched with the "Mode-selector" - that`s the reason why it`s
not so easy to stompswitch the modes)
(also, this switching arrangement calls for a large amount of high-ohm pulldown resistors, that cry for metalfilms...)


a few years later, I "googled" (in fact it was "yahoo`d", back then...) for the WORM (= 3-knob-Wahbrato)
after it was issued by E-H under that name,
and stumbled across this forum, where 3 certain forumites claimed to have the schemo of it.............





NEVER trust a schematic on the web!!!

Schemos for nuttin` and chips fer free?







later again, a combinational mod of the transistor 3-knob/3-stage mod with the original (4-)Tube-Wahbrato
led to the 2-tubed:



(which can be regarded as the legit "Tube-Worm"  icon_mrgreen)



[ps: can`t seem to find the `96 pic of the switchable Tube-Phaser/-Vibe pedal, that ought to be between the 2nd & 3rd pic...]

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$uperpuma
Posts: 1065


Nate Garcia


WWW
Re: Electro Harmonix The Worm
« Reply #13 on: March 07, 2007, 06:41:22 PM »

so impressive. Just....wow.
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Breadboards are as invaluable as underwear - and also need changed... -R.G.
RDV
Posts: 4161


RickyDonVance


WWW
Re: Electro Harmonix The Worm
« Reply #14 on: March 08, 2007, 06:25:02 AM »

Bringin' th' funk as usual Tonmeister.

RDV
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Paul Perry (Frostwave)
Posts: 7470

Paul P.


Re: Electro Harmonix The Worm
« Reply #15 on: March 08, 2007, 06:39:19 AM »

Nice to have the Word on the Worm icon_smile
I guess MM knows his market - but it's always sad to see a couple of useful controls forced out.
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DWBH
Posts: 617

André


Re: Electro Harmonix The Worm
« Reply #16 on: January 05, 2009, 03:05:56 PM »

Lets bump this.
The big enclosure Worm has been discontinued, having since been replaced by an XO version (BB sized diecast box). One (and I think the only) difference between these two is that the most recent version has an Expression pedal input.
Does anyone have a schematic for either (or both) pedals, so I can implement the EXP jack on an older versions?
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puretube
Posts: 7207


but, err, I`m not really here...


WWW
Re: Electro Harmonix The Worm
« Reply #17 on: January 10, 2009, 05:51:31 PM »

here`s your answer...
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