Tuesday, 24 April 2012

Jordan Vico Vibe

Actually a very nice sounding tremolo rather than the effect the name suggests.  A clone of this is currently being sold by a company called Mahoney and they wrote:   

In the late 60's, Jordan offered an incredible sounding tremolo unit that was housed in the plug-in style box like the Bosstone. There were less than 100 of these rare units ever produced.

Some people have mentioned a volume drop when the pedal is engaged, so it may be worth building this in a box with a clean boost of some sort pushing it, so you have more control over the level.

This is a demo of the Mahoney copy which will give you a good idea how this sounds:



44 comments:

  1. Hello. I know precious little about these projects I build, but I have picked up a thing or two and I am wondering how this thing makes a tremolo effect. To look at it, it looks like a dirt box of some sort. Where does the magic happen? Thanks as always

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    1. This is a strange circuit actually, not what I normally come across when doing these things. If you look, the input and output are both connected via a 27K resistor to the same place, Q1 collector. So as they are connected signal will flow straight from the input, through the resistors to the output as long as nothing is happening at Q1 collector to otherwise affect it. To create a tremolo effect it needs to modulate the volume and it does that at the rate of the LFO around Q2, by switching Q1.

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    2. Interesting. It's a nice sounding unit as judged by the video. I wonder why this method is so under utilized.

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    3. If you look at the Tiny Tremoloooo(etc) thread on DIYStompboxes, the theory is very similar for that, except it uses an LDR instead of a transistor. Same principle though, the LFO alters the resistance of the LDR by making an LED brighter and dimmer and that alters the resistance between the input and output, and so modulates the volume.

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    4. Hello, I just finish it, it works great. Thank you very much!

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    5. That's great, thanks for verifying!

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  2. Mark,

    I built this and overall it sounds great but I have a couple of questions. First a few notes:

    -I used three LEDs in series instead of the 6.8 zener diode, but I get 6.8v exactly, so it shouldn't make any difference

    -I used a 500k trimpot (didn't have a 1M available)

    That said, I am not getting any notable rate change until about 1/2 turn on the rate pot. Same with the depth pot...only 50% does anything. What could be causing this?

    Secondly, I have tried several pairings of 5088s and 5089s but I still get some transistor artifacts and cant quite smooth out the overall sound. What can I do to fix this?

    Finally, what can I do to get a wider rate sweep?

    Thanks in advance!

    -Kellet

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    1. I haven't played with this circuit at all yet, although I suspect using a 500K instead of 1M could affect the rate and depth control. As it is though it is a very simple circuit so maybe the artifacts and lack of smoothness is the end result of that simplicity, but I'll have a look to see if we could include a filter somewhere that may help smooth things out.

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    2. Cool...I guess I'll just have to do some experimenting. Thanks.

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  3. I build one of these ...and put a JFET preamp in front to boost it a bit ( to Avoid a Volume drop ) Very cool Vintage Tremelo...Now i wanna Play like Link Wray. Thanks.

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  4. This thing does sounds real nice. I have the same issue as Kellet though - the minimum rate is not slow enough.

    tried messing around with the trimpot (I replaced with a 1M log and brought it off board) and it give the best trem around the 1/2 way point, more kills the sound completely, and less kills the trem.

    You ever find anything that worked well Kellet?

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  5. Just finished one of these on the weekend - following the fold in regards to bringing the trim pot offboard (can make it really lush or really choppy, even though you can only use maybe about 25% of the pot turn), might ditch the depth pot completely as it doesn't do much (and the now offboard 1M pot has more of an overall effect on depth), but yeah, cannot tame the speed - starts off moderate and quickly turns it into insane.

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  6. Hi, I just finished this pedal some hours ago. Sounds really nice and it´s an easy build.

    I have some questions. The last 1/4 of the depth pot seems to have no effect, the signal have no depth until you reach this point. Maybe I have to adjust the trimpot better?

    And about the rate, I just want to know the same as DrRJE. Did you find the solution?

    The last, Is anything you can do to increase a bit the output without boosters or external things?, I mean in the circuit of the pedal itself.

    Thanks

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    1. I meant "the FIRST 1/4 ....."

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    2. i ditched the depth pot and took the 1m trim off board - only a small part (1/4) of the pot is usable, but it is far more effective than the depth pot. as for the rate.. no idea.. i've not boxed this build, and just finished the heartthrob, which sounds like a better trem and works really well, and has a really good adjustable rate (via switch). i'd head over there and give that one a go.

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    3. Thanks for the replay. I´ll do another too, posibly tremulus lune. I like this sound but I need a more versatile pedal

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  7. Hi,can i use a 9v1 Zener instead the 6v8 ?

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    1. I've never tried it so don't know for sure, but I expect you'd need the correct diode, or closer to it than 9.1V

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    2. Thanks !
      I received some 6v8 Zener today,i'll try this circuit.

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  8. I built one of these based on Lucifer's (iirc) schematic on fsb. It's cool, but I'd like to get a slower rate than mine allows. Right now, mine sounds just a bit faster than the cool bit on "For What It's Worth". Anyone have an idea on some mods? I'll mess around with it tomorrow...

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  9. Hi, I'm new here. I have built this but the effect is very subtle even when everything is turned up.

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    1. I definitely wouldn't call this a subtle effect so something must be amiss. Check all the usual and post the transistor pin voltages to see if that points to a problem.

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    2. I got some new trim pots in and it works fine. Thank you

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    3. Glad you got it going, what do you think?

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  10. am I correct in saying that the cut on 11,4 is unnecessary.

    I have the larger style trim pots and I was looking to move things a round a bit so I did not have to bend the leads and it seems to me that you could eliminate that cut since nothing connects to the left of it and then either style trim pot would work


    this is a really nice tremelo, this is the third time I have built it.

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    1. Yes it's unnecessary. I put the cuts in as I'm building so I can use the row further down if I need to, so I often have extra cuts at the end which aren't required, as is the case here.

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  11. I have use BC549 instead of 5088, it sound not so good, cut the high and the speed at minimum is too quick. Wich component regulate the speed frequency? Its a good replacement the BC549

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  12. All solved, very nice sounding tremolo. The only problem is that at minimum speed is not enough slow.
    Any idea to have a slower speed?
    thanks to all!

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    1. I'd try 1k instead of the 3.3k connected to the rate pot.

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  13. Hi, I built the pedal and I really like how it sounds with the exception of a small BIG thing:
    the pedal distorts the signal. I think it sounds like a Fuzz when you put it with the minimum gain.

    I made a video to understand what I say: http://www.youtube.com/watch?v=CCQcfHkSbJg&feature=youtu.be

    at 1:58, you can hear the distortion of which I speak


    when I put the tremolo in the fx loop you feel even more distorted signal.

    I think it could change the transistors for one of "lower gain transistors". but, I do not know which.

    I really do not know how to solve the problem.

    help me! ,


    Thank you very much!

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    1. Hello,
      I have the same interests as you. I saw on the forum freestomboxes.org he was advised 2n5088 and I also believe that a linear potentiometer would be better for the depth but I have not tried yet.

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  14. Yesterday I replaced the Depth pot with a linear one and it improved significantly.
    I also added 20k ohm in series with the rate pot to allow slower swells.

    Its a simple and nice effect.

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    1. This comment has been removed by the author.

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    2. Thanks! I also found that the Depth pot is much better linear.
      The 3k3 resistor is not necessary at all. It's just limiting the higher range of the Rate pot.
      If you want to make the LFO slower then you need to replace the three 100n caps associated with Q2 with a larger value.
      I ended up putting another 100n cap in parallel to each of these, raising the value to 200n. This gives a nice range.
      Whatever the value, it's important that these three caps are the same or you get weird results.

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  15. THanks for this layout. BUilt it and loving it! Nice vintage sounding trem (I did put a Tillman preamp at the output to even out the volume drop). However replaced all 100n caps with 200n caps for slower rate overall. I guess i shouldn't have replaced the cap at the wiper of the depth pot too, but it sounds great anyway. I guess that cap isn't that critical. Is it? What do you guys think?

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    1. You followed the original circuit. Only changed the ​​capacitors?

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  16. Built this one and going to box it. Like it, so I'm going to try it out with some other pedals.
    I used a linear pot for the Depth control. Slightly better indeed. I built the rest of the board similar to the layout.

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  18. hi, does anyone know, what controls the rate speed? 'cause I can't get mine so slow like in the video.

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  19. I built this vero 2 times just to make sure of the issue. I have tried the linear and log for depth but not much change. The speed works fine but when you turn the depth you get nothing till between 1/2 and 2/3 of the way and then it is a huge jump. I have used the 1meg trim pots and it does not seem to do a lot for me unless it is turned down then the output is low. Is there anyone that has successfully built this pedal and was able to get it to sound like the demo? Please review my photos of my build. I really want this to work as it has become a mission at this point. I really appreciate any assistance you can give.
    http://s1383.photobucket.com/user/denfox1/media/tremolo1_zps824d89b1.jpg.html?sort=3&o=1
    http://s1383.photobucket.com/user/denfox1/media/tremolo1_zps824d89b1.jpg.html?sort=3&o=1

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  20. Hi, thanks for this awesome project, I just built this tremolo and it sounds great, but I have a little problem, It takes time till it works when I turn it up except the case when the rate is all the way up, usually it takes 5-10 sec till it starts to vibe.
    Thanks for any answer preventively :)

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