Marshall Electronics MXL 990 Stereo Upgrade Manual Download Page 13

c.

 

Then tape a layer of parchment paper on top of this. Keep a spare layer of parchment trimmed to fit on 
top, as you will want to put another layer on top of the foil before you cut it.  

d.

 

Make a 2

nd

 piece of glass with just parchment on it. You will use this to trim up the ribbon foil to a 

smaller size.  

17.

 

Cutting the ribbon 

a.

 

Turn off all the fans, close the heater vent, put the dog outside, kill the cat (Geesh, OK, I like cats) close 
the door.  The slightest breeze will send the foil flying.  

b.

 

Put the surgical mask on.   

c.

 

OK Branch in process 

i.

 

If you are using Rick’s foil material, you can leave it in the thin parchment paper, as it cuts OK.  If 
you are using the foil from Lebow, I have found that when you cut the foil in the parchment they 
provide, it sticks on the edges, and can tear the ribbon.  So if you are using Lebow foil, I suggest 
removing the foil from their parchment, and use kitchen parchment paper.  

d.

 

Bring the ribbon foil over the top of this 2

nd

 piece of glass, with only the parchment paper.  You will 

essentially want to gently and carefully use one of the tweezers to float the foil out onto the parchment 
paper.   But don’t manhandle the foil, it will tear.  Carefully remove the ribbon foil, and slide it onto the 
parchment paper.  You don’t want it to fold either. Nice and smooth.  

e.

 

COVER IT WITH ANOTHER LAYER OF PARCHMENT 

i.

 

What I suggest is roughly cutting it into a section that 110mm tall (the length of the motor 
element and some extra length for the ribbon alignment jig), by 55mm, which is a little wider 
than my cutting guides.  

ii.

 

Using a fresh razor or Xacto and steel ruler (cork side up), cut the ribbon material.  

iii.

 

Take the extra ribbon material and put it back into its parchment and store.  

f.

 

Now take this glass, and bring it over to the other piece of glass with the cutting guide, and gently float 
the foil you just cut onto the cutting guide, roughly aligning it with the cutting lines. 

g.

 

Tape a fresh piece of parchment paper on top of the foil.  

h.

 

Again using the steel rule cork side up, line up on the guide and cut several ribbons.  While you might 
not need them all, cutting multiple now, will save you material, as you will have to trim off that 1

st

 edge 

the next time you need it.  So might as well cut some extras.    

i.

 

Using the cutting guides to cut your ribbon.  I found that a 5mm wide ribbon works well.  

Summary of Contents for MXL 990 Stereo

Page 1: ...ies and upgrade rather than making a body from scratch This has some limitations with respect to the dimensions of the body but I think it gives a much more professional look At the same time you now...

Page 2: ...lity Ribbon Motor and Transformer into one quickly turns them into sounding like a mic costing 1 000 or more 1st is a Series This is in fact the 1st in a series of Instructables with adjoining 3 D pri...

Page 3: ...u to fold it in half and gently tuck your ribbon into it so you can corrugate it Once you cut your ribbon you need some place to gently stow it before you corrugate it Plastic Tweezers So much easier...

Page 4: ...allows you to place the Ribbon Motor in it than drape the ribbon element across it to more easily align it and put tension on it I used brass nuts to hold the ribbon in place and used a toothpick to...

Page 5: ...ame across a very simple arts and craft corrugator which works perfectly I of course wanted to 3D print some fancy contraption for it but the simple device works just fine 3D Printed Ribbon Motor Moun...

Page 6: ...or bracket and transformer bracket o You can get them from Rick as part of his kit PLA 02mm 100 infill or print them yourselves getting them from Thingiverse below MXL 990 Upgrade http www thingiverse...

Page 7: ...you want to go hog wild and buy a sheet of 1 8 micron foil it will set you back 25 plus shipping Not a whole lot of difference but I spent the extra money Hit the site below then email them with what...

Page 8: ...take a screwdriver handle and push up on the inside of the grille to again return the top to where it is curved out You don t want to have the top of the ribbon element touch the grille as it will sh...

Page 9: ...he metal plate I would suggest screws going through the ribbon element bracket with the nuts on the transformer side See that little Intent in the bottom there See the little grooves in the back of th...

Page 10: ...e wires through the mic body BEFORE you solder them to the XLR connector Then solder the red lead to the pin which is pin 2 Solder the black lead to the pin which is pin 3 Slide the heat shrink over t...

Page 11: ...e the metal plate into place Twist the transformer wires a bit as you go Then install the 2 screws to hold the metal plate in place and tighten up the side arm screws This is actually where I connecte...

Page 12: ...ings easier later 16 Prep for dealing with the Ribbon using the cutting guide PDF a Use the ribbon pocket guide to 1st cut a number of pieces of parchment paper This will create 20mm wide strips First...

Page 13: ...of the tweezers to float the foil out onto the parchment paper But don t manhandle the foil it will tear Carefully remove the ribbon foil and slide it onto the parchment paper You don t want it to fol...

Page 14: ...into the pocket and once in tap the folded edge of the pocket on your desk to have the ribbon be straight along the folded edge This is important as when you go to crimp the ribbon this will help it s...

Page 15: ...have picked up ii Clean with some alcohol don t use acetone it will loosen the superglue e Put the 4 screws used to hold the ribbon element brackets in Then flip the jig upside down and then put the...

Page 16: ...and center the ribbon while sliding it back to put tension on the ribbon i You want enough tension to where the ribbon looks straight across the motor You don t want it to sag But you also don t want...

Page 17: ...audio interface or mixer and give it a try NO PHANTOM Power You will need to turn the gain up pretty high What I recommend is to put an inline preamp close to the ribbon mic so it has some gain befor...

Page 18: ...ssed with the purity of the sound It sounds great I like that this let s me quickly and easily re ribbon when needed and the alignment jig really makes installing a new ribbon a snap I hope you have a...

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