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whiskeytown
Copper Member

United Kingdom
16 Posts

Posted - 09/24/2008 : 14:14:47

Just build Scot Swartz�s delay PT80, with PT2399 echo/delay chip, NE571N compander, and when its on there is only clean sound, no delay at all, anybody can help me pls?!

Dr. Bob
Moderator

Australia
6593 Posts

Posted - 09/24/2008 : 15:32:36

Hi whiskeytown

Please post a link, so others here can have a look.

Isn't the PT2399 echo/delay chip, used in most of DVD players, with karaoke Microphone inputs?

well at least that's where I got my PT2399, plus it was already,
all made up & built onto a PCB, with the pots & the 6.5mm input sockets.

I just had to add an output socket & a battery.

BTW there is a Datasheet floating around the web.
Just found it on www.datasheet4u.com

http://www.datasheet4u.com/html/P/T/2/PT2399_PrincetonTechnologyCorp.pdf.html

Apologies - it's here:
http://www.datasheet4u.com/download.php?id=358640

Regards Dr. Bob

Edited by - Dr. Bob on 09/24/2008 15:35:57

whiskeytown
Copper Member

United Kingdom
16 Posts

Posted - 09/24/2008 : 17:13:25

http://www.generalguitargadgets.com/index.php?option=com_content&task=view&id=125&Itemid=26

http://www.generalguitargadgets.com/pdf/ggg_pt80_lo1.pdf

my version includes charge pump.

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