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Author Topic: Belcat 503 Delay  (Read 10165 times)

boneless

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Belcat 503 Delay
« on: June 01, 2010, 12:29:48 PM »
The Belcat 303 is a cheap delay pedal which (I think) uses a PT2399 chip. (The printing on the chip inside mine was hard to read)

I didn't study schematics for the chip but instead used the Reed Ghazala prod it and see approach, which I think can be more fun...

There are probably more bends to be found but I was happy with these - three of the bends cause endless oscillation to distortion. The other causes glitchy noise bursts. It probably could have benefited from some fine tune pots, but I was working fast!

Sound examples to follow...

http://www.nealbeardahm.blogspot.com/

ADMIN EDIT: changed thread title
« Last Edit: June 01, 2010, 11:43:54 PM by Circuitbenders »
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Circuitbenders

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Re: Belcat 303 Delay
« Reply #1 on: June 01, 2010, 01:25:33 PM »
Is the original soldering really shit on these things? I had one of these a while back and had to reflow half the solder joints after about an hour or two of using the thing as it was just falling apart. Maybe i just got a friday afternoon unit.  :-\

Is that a Belcat 303 or 503? They seem to be labelled as 503 but the one on the actual Belcat site is a 303.
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boneless

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Re: Belcat 303 Delay
« Reply #2 on: June 01, 2010, 02:50:01 PM »
DOH! Apologies it is a 503 - I ordered a 303 and thought they had just re-packaged it. I didn't realise it was a new model...

Is it possible to change the thread title?

And yep the shoddy soldering inside made me feel a whole lot better about my builds!
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phantompowers

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Re: Belcat 503 Delay
« Reply #3 on: June 02, 2010, 11:22:07 AM »
Has anyone bent/modded the 303?
I managed to get mine to give infinite repeats and extended delay time but I couldn't find out how to change the echo volume. I'm guessing there is a resistor somewhere that needs bridging but I couldn't find it. I've just been given another one of these pedals and it needs bending 'cos unbent these pedals are really lame.
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Gordonjcp

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Re: Belcat 503 Delay
« Reply #4 on: June 02, 2010, 06:08:03 PM »
Post a couple of good photographs of the component and track side of the board, and I'll take a look.
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boneless

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Re: Belcat 503 Delay
« Reply #5 on: June 03, 2010, 11:10:57 AM »
Just in case anyone wants to hear my 503 there's an 18 minute improvised recording using it here-

http://www.nealbeard.saftandboneless.co.uk/NEW%20SITE/RECORDINGS/mp3's/BELCAT%202%20TUESDAY%201st.mp3

INSTRUMENTS USED

Circuit bent quid bleepy keyboard
Circuit Bent Belcat 503
Resonant Lowpass Filter + Reverb (these were set at the start of the recording and not changed so all the sound manipulation nis done with the 503)

Towards the end of the recording I introduced a homemade oscillator and my circuit bend/hacked crappy SK 322b.

Cheers
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phantompowers

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Re: Belcat 503 Delay
« Reply #6 on: June 03, 2010, 02:02:49 PM »
Cheers Gordon. I'll get round to it soon as I can.
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