Homebrew Drum Computer - test-drb@ccmp.vtda.org

15 Dec 2007

Date: Sat, 15 Dec 2007 13:23:13 +1030
From: Robert Nansel <bnansel at bigpond.net.au>
Subject: Homebrew Drum Computer

...
 I thought of this, too.  So far I haven't found an
online source of  
them (Google search terms: "glass delay line" OR "quartz delay line" 

OR "ultrasonic delay line" TV PAL OR NTSC). 
...
 -Bobby 
Fri Dec 14 19:10 Tony Duell wrote:

...
 > I wonder if you could use those glass delay lines
that were used in   
> PAL colour TV receiver until fairly recently (and there must be plenty  
> still around)? Alas they have a somewhat odd delay time (a little less 
> than 64us -- one line period of the European TV signal), but I am sure 
-----------------------
I've got some old VCR boards with 2 glass delay lines on 'em:

Markings: DL BTB85B 042 (Component # DL2K0, 6cm long, 4 pins)
And: ADL-FN2038M 337P16301 4003 (DL6A0, 3cm, 3 pins)

Just slabs of quartz with wires attached (the covers are removeable).
Might be tricky to find specs though; unfortunately no idea of the VCR
make/model.

Also should have an old MS delay line somewhere.

mike