Zoom 505 information

This page is devided up into 3 sections
[General Information] [Patches] [Modification!]



General information

This is not some factory exaggeration speech about the 505.  This will be the honest truth about the performance of the Zoom 505, and some of the specifications.  I have had my 505 since September of 97', so I have had a little time to mess around with it and here are my thoughts about it:

Specifications

24 user editable presets
compressor, limiter, pedal wah (expression needed), auto wah
Acoustic, Rhythm, Overdrive, Distortion (thrashy), blues, fuzz, lead, and metal distortion settings
Zoom Noise Reduction (works all right)
EQ (4 band) phaser
Chorus, Flanger, Doubler, Stepper (auto appregio), Pitch shifter
Delay, Hall, And room reverbs.
An optional expression pedal and bank switch (check mod section to learn how to build 'em)


Patches
I don't have any typed up right now.. but, when I do have them they will be general patches, no "This is the effect for the Enter Sandman solo"..

COMP DIST GAIN ZNR/AMP EQ/PHASE MOD DLY/REV LEVEL COMMENTS PATCH TYPE
                   
                   
                   
                   
                   
                   
                   

Modification!!

This section must be used only by experienced people. If you don't know how to solder, learn and come back.  These tips are pretty straight forward and I have included pictures to help you out.  Please feel free to mail me with any other mod tips!

TIP 1: Noise... This thing is more noisy that a barrel of monkeys rolling down a rock wall.  The thing that needs to be down to to ground the thing out better.. Here is a picture to help me demonstrate:

zoom505underside.jpg (21851 bytes)

The grounding wire is what we are after.. here are the step by step tips:

  1. Make sure everything is unplugged from the 505.. even the battery. (if used)
  2. remove the 4 brass colored screws from the bottom.
  3. locate board screw (labeled) closest to the power connector/input. (it should be black)
  4. unscrew it and remove grounding wire (the little paperclip like rod sticking up)

OK, now what we are doing is replacing the cheap excuse for a ground wire with a speaker wire.. here is what you will need:

  1. Soldering iron (pencil type is fine)
  2. Solder of course. . possibly some desoldering braid or sucker bulb.
  3. small length of braided copper speaker wire with shielding.. not too thick
  4. a lug connector for attaching wires to screws.

Crimp and solder the lug onto the speaker wire.. The wire only needs to be 4 inches or so.. make sure you don't burn off too much of the insulation. now solder the other end too the metal plate.. near the screw hold preferably.  now screw the board screw back in through the lug.. You know, make sure lug is grounded out against the board contact.   Make sure that the lug is touching no other points on the board except the tin ring around the screw hole, that is the board's grounding point.

Put the cover back on and you should be all set.

TIP 2: Reducing the noise even more!

This may be a little more simple depending on your aptitude.  What we are going to do is use a 3 prong wire power supply.  Find a power supply that has a 3 prong connector or solder on in place. connect the 3'd lead (ground) to the chassis of the zoom.   this will provide an earth ground for the 505.
3prong.jpg (8312 bytes)

TIP 3: How to build that damn expensive expression pedal.   Here is how it works.  The 505's "Control" socket (located next to the input) is a stereo jack.  here is a picture to help explain:

plug.jpg (5826 bytes)

Pos1 is the positive lead for the expression pedal, and pos2 is for the bank switching device.  The polarity is not very important. What you will need to do is either build a volume pedal or buy a cheap volume pedal.. they run about $35 bucks.. (or a lot less) and the switch is hard to work.. what I understand is it must be on all the time (closed) and for the bank to switch it needs to be turned off (open)., now that is the trick.. I'm pretty sure that they make buttons that are momentarily OFF switches.. as in when you press it in it opens the circuit (disconnects) and when you release it will close the circuit (short). This switch is not standard so check your local Radio Shack or other electronics supply stores for one...

Zoom probably makes their equipment that way so you can't shortcut around it and make your own expression pedal, but I figured it out. If you haven't noticed that the control is VERY sensitive to movement. Even a fraction of an inch. I have a theroy that it might be in fact a variable capacitor and not a varible resistor... I will keep you posted. It was 2 o'clock in the AM so I wasn't about to bother with it.