What is LDR?

[k1enneth]

I have a Roland AS-1 Sustainer schematic...it shows a LDR 70ohm resistance under "incandescent source". I think it stands for light dependet resistor.
But nothing appears in the MOUSER catalog. What is a current replacement for the same item?

[tungngruv]

That is what they are,  light dependet resistors. I got mine from Steve at SmallBear.

[sir_modulus]

Heres the link for Small bear. See if there is anything that would be about right.

Smallbear

Cheers,

Nish

[vfr800fiman]

You can use a photocell at radioshack also.
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F006%5F000&product%5Fid=276%2D1657&find=photocell(keyword)&site=search

[Marek]

That AS-1 seems like a nice semi-vintage build :-)
http://www.geocities.jp/hirock2001/diy2/effect-comp01.html
Can we see the schematic?

About the LDR's:

westfalia.de is selling following types of 'Fotowiderstand':

A: 20 Ohm - 0,2 MOhm
B: 250 Ohm - 0,9 MOhm
C: 170 Ohm - 1 MOhm

And conrad.de is selling 'Fotowiderstände' which have resistance range between 75-300 Ohm @ 1000 lx(?), and
10 Mohm @ 0 lx.

There are also some other types, which seem less interesting, with the resistance range from

A:  28 K Ohm  @ 10 Lx  -  1.4 K Ohm
B: 8,3 K Ohm - 85 K Ohm
C  8.0 K OHm - 100 K OHm

Well, its your choice...

Greetings,
Marek

p.s. If that AS-1 schematic is too shy to show in public, you can also mail it to me :-)  tdkburn@musician.org

[k1enneth]

http://www.geofex.com/FX_images/rolandsu.gif

I am looking for a "supersustain" type of pedal that does not have a lot of distortion such as Proco Rat or Fuzz Face... I have not HEARD the roland supersustain AS-1, I have only read the review of the above pedal at Harmony Central. If anyone has heard the pedal thru a tube amp, please give a definiiive review of the sound. Thanks

[Marek]

Listen:

http://polophonic.hp.infoseek.co.jp/as1/as1.html

[k1enneth]

I don't know if he was pushing the sound thru a strong tube amp. It sounded
like a solid state amp. That makes a huge difference in sound. But thanks for the sample. Maybe build this pedal and a fuzz face clone and A/B them.