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    Mark Knopfler’s Morley Volume Pedal

    Posted in: Mark Knopfler gear by Ingo on September 22, 2008


    After the other article about Knopfler’s Ernie Ball volume pedal, this time I want to feature the volume pedal he played before, which means during the Dire Straits days until the end of the Making Movies tour in 1981. The pedal I am talking about is the silver Morley Volume Pedal.

    Morley made a whole range of effect foot pedals, including a very popular wha-wha or even models with built-in flanger or delay. All of these could be used as simple volume pedal as well. Knopfler’s model, simply called “VOL”, was just the ordinary volume pedal.

    The unique thing about those Morleys was that they did not use a poti  but a photo resistor instead. The advantage: potis tend to make noise after some years of usage, the photo resistor will not, no matter how much you use or even misuse it (dusty or smoky stages, humidity etc.)

    What sounds rather complicated was in reality an extremely simple circuit: a small bulb  – the one behind the red jewel light that is also used as power indicator – shines on a photo resistor (LCR) which lets the guitar signal pass as long as it receives light. When you roll back the pedal, a piece of black cloth is pushed between the bulb and the photo resistor which reduces the volume of the guitar accordingly. That’s all! Well, the simple ideas are often the best

    The bulb (right) shines on the LCR (center), if this is not covered by the cloth

    As the bulb needs electric power, the pedal is powered via mains line voltage, no external 9V adaptor like modern pedals! Since the power indicator bulb is part of the circuit, it means when it blows the pedal is dead. Fortunately replacing the bulb is simple and cheap.

    The pedal way is extremely long. This means you can control the volume precisely, but you have to move your feet quite a lot. You get used to this, I have no problems with it. You can adjust how quickly or slowly the pedal reacts with a screw that changes the position of that black cloth. And you can adjust how easily the pedal moves with the two screws that hold the pedal. The whole thing is very stable, you can rest your foot with a lot of weight on it without problems.

    One thing that is remarkable is that the pedal changes the sound, even when pushed down completely (full volume). This is due to the – compared with other guitar gear – extremely low input impedance which dampens the resonance peak of any passive guitar pick-up. It sweetens the sound of a Stratocaster pick-up. Without it that Dire Straits sound would definitely have been harsher.

    * * * * * * * * * * * * *

    Addition: At this very moment I have two Morley volume pedals from the 70ies for sale. Both are 230 volts models for Europe, with  a German power connector, but replacing this for any other European type is very easy.

    One of them has a little modification, someone built in an XLR output in addition to the normal output jack (see picture), this has absolutely no effect on sound or operation. Otherwise they are stock and are in used but good condition. Of course both work flawlessly.

    By the way, after opening quite  a few of these over the years, I observed that the input impedance is not the same for models from different years. The ones I am selling are definitely the same value as Knopfler’s.

    Price: 69,-€ for the one without modification, 59,- € the other. Postage and  shipping within Germany is 7 €, within EU is 17 €. No shipping outside EU (remember, they are both 230 volts anyway). Use the comment function of this article if you want to buy it. First come, first serve. Prefered paying is Paypal.

    "Buy me a beer" - Most people take it for granted to get top-quality content for free. Advertizing income covers less than 10% of the work I put into the site, so why not say thank you with a PayPal donation?

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    18 Comments »

    1. Hi Ingo – I’ll take the one without modification 69 euro + 7 euro shipping :-)

      Comment by Dermot O'Reilly — 23. September 2008 @ 09:03

    2. Hi Ingo,

      I finally got the time this weekend to get it plugged in and well what a great pedal this is, I have an old Ernie ball so I wasn’t expecting much different and really bought this out of curiosity and the look of the thing.

      1. It really has a violin affect, warm and smooth, it makes my Boss DDS-3 sound better strangely.
      2. I always struggled a bit with the solo in Lions (first note or two with the bridge pu) as it was too harsh a sound, this gets that wonderful horn sound with a beautiful transition as the volume is raised.
      3. You can rest your right leg in a more cocked position than the Ernie ball which feels more comfortable and supports the guitar better with the top of the thigh. (important that ;-) )
      4. When you hear this it’s only then you appreciated what is on the record, it’s fantastic when used at the end of a string bend too, really soulful.

      It was your site back in the day that made think about getting a Morley, and then got side tracked with an Ernie ball and now you supplied one.

      Thanks a million,
      Dermot.

      Comment by Dermot O'Reilly — 13. October 2008 @ 12:56

    3. [...] article on his two red Fender Strats) and the black Fender Telecaster on Water of Love over the Morley Volume pedal, and the MXR analog delay, but now he played two of the Music Man HD 130 amps, David played a [...]

      Pingback by Pictures of Dire Straits, Live at the Zirkus Krone, Munchen, May 29, 1979 | Mark Knopfler Guitar / More Knowledge about the guitar — 9. November 2008 @ 14:09

    4. Nice article Ingo! That cloth thing in the Morley is just not quite clear to me though. Could you please post a pic that shows a larger part of the pedal inside, so I can see what moves against what and how? Also, could you please draw a schematics for this pedal? Or at least measure the resistance of that LDR, or give me its type. I’d like to build an opto-volume pedal! :-)
      Sorry for the lot of questions, keep up the great site and keep on pickin’!

      Roland

      Comment by Vihar — 15. January 2009 @ 22:22

    5. [...] definitely uses the Morley volume pedal here. And the green MXR analog delay can be seen on the right side of the microphone stand at [...]

      Pingback by Gear on Dire Straits’ first TV appearance at Old Grey Whiste Test | Mark Knopfler Guitar / More Knowledge about the guitar — 21. January 2009 @ 17:54

    6. Hi Ingo!,
      I´m interested in the pedal that you have, I live in Spain.
      Mail me, to send me all the details.
      Congratulations for your site. it´s great.

      Comment by Antonio — 21. January 2009 @ 23:33

    7. Hi there Ingo,

      If you have any of your Morley Volume pedals left for sale I would be very interested – please let me know.

      Thanks,
      Andy (UK)

      Comment by Andy — 27. January 2009 @ 14:15

    8. Hi Andy,

      yes, I have. Please use the contact form of this site (under ‘Pages’) again, and I will reply via email then to tell you the details.

      Ingo

      Comment by Ingo — 27. January 2009 @ 16:23

    9. Hi Ingo,

      Having had a chance now to play with the pedal I would just echo Dermots analysis – a very smooth precise transition cen be achieved and it sounds great. The long pedal throw is easy to adjust to also. Thoroughly recommended.

      Comment by Andy — 27. February 2009 @ 13:23

    10. Hello Ingo
      I have enjoyed the information on knopfler. I find the tone on sultans to be a holy grail of sorts -not unlike many people. I heard Muff Winwood used an aural exciter on the first album and bought one myself. I know they make a foot pedal now as well. Have you ever used one?

      I recently purchased some bare knuckle pickups that I’ll be putting into my 50’s strat reissue. I’ll let you know how they sound if you’re interested.

      I take it that live in Germany. I live in California and teach history at a local school. You have a place to stay if you ever want to come and visit.
      cheers
      karl

      Comment by karl liebhardt — 29. March 2009 @ 19:32

    11. Hi Karl,

      the info about the Aphex Exciter on album one is not really confirmed. I have never tried the floor version myself, but I think Dermot has it.

      I heard some good things about the bare knuckle PUs but have not tried them either.

      “You have a place to stay if you ever want to come and visit.” That’s very kind of you :)

      Comment by Ingo — 12. April 2009 @ 11:20

    12. Hi Ingo,
      if you have any pedal left please let me know, it will be with shipping to France.
      Your site is a well of information, Congratulations!!!

      Comment by Maurice — 30. April 2009 @ 10:22

    13. Hi Ingo,
      I’ve been looking for the Knopfler Morley volume pedal for a long time and would very much like to purchase one from you if you have any left! I’m a professional guitarist and live in Ireland. Like Karl said above, if you ever come to Ireland, you’re more than welcome to come stay, play and talk all things music. By the way; your site’s great and thanks for all the hard work you put into it. I’m sure it’s much appreciated by many people.
      Take care and look forward to hearing from you.
      All the best,
      Doug

      Comment by Doug MacGowan — 20. May 2009 @ 18:42

    14. Hi Ingo

      Peter from Sweden here,if u have any Morley left,pls let me now.Great job,great site\s

      regards
      Peter Fransson
      Krokstrand
      Sweden
      e-mail:peter-fransson@telia.com

      Comment by Peter Fransson — 27. May 2009 @ 03:44

    15. Unfortunately I don’t have any Morley left for sale at the moment.

      Comment by Ingo — 27. May 2009 @ 06:26

    16. [...] clone of the Mark Knopfler Fender Strat S.-No. 80470 (mainly of Fender parts) , into Morley Volume pedal, into MXR analog delay, into Music Man HD 212 [...]

      Pingback by Dire Straits Down to the Waterline explained: licks – chords – solo – no tabs | Mark Knopfler Guitar / More Knowledge about the guitar — 9. July 2009 @ 18:07

    17. Hi Ingo,

      Really appreciate your site, the information is very useful.

      I have a question re: “I observed that the input impedance is not the same for models from different years. The ones I am selling are definitely the same value as Knopfler`s.”

      Could you describe how to measure this value, and what the value is for Knopflers pedal? I have a couple these pedals, one of which I want to restore, and I’d be interested to find out where they are in terms of this.

      Thanks & kindest regards!

      Comment by Left Swinger — 8. August 2009 @ 21:35

    18. [...] black Strat on Setting me up (more info). The guitars went through the Morley volume pedal (more info) and the MXR analog delay into two Music Man amps (more [...]

      Pingback by Dire Straits 1979 concert photos from Liverpool and Birmingham by Alan Perry | Mark Knopfler Guitar / More Knowledge about the guitar — 28. September 2009 @ 16:52

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