[Premium-Rx] Cubic R-3036 dual MF/HF receiver info wanted

[Nick England]

Thanks for the many helpful responses. I have located a local buddy who can
read the good chip (assuming the security bit isn't set) and make a copy.
We'll see...
I have spent a while tracing the pinouts and it looks like it may be fairly
simple to reverse-engineer with some logic analyzer work. On the R-3030
schematic, a similar function is implemented with a 74C138 (1 of 8 decoder)
and some OR gates, so it appears to just be combinatorial - meaning I can
probably figure it out manually even. This GAL controls reading the keypad,
strobing the displays, etc.

It has been eons since I messed with PALs/GALs - I've been playing with
tube-type gear in recent years.

Nick England K4NYW
www.navy-radio.com


On Tue, Apr 23, 2019 at 3:35 PM Nick England <navy.radio at gmail.com> wrote:

> Update -
> Well, my hamfest gamble was 50% successful. My bad Panel Interface module
> is due to a bad GAL16V8 programmed chip (Cubic 3871-3003 ver 1.0). The
> problem changes sides when I swap this one chip. Sigh.
> Just in case anyone ever turns up a junker R-3036 or a 2866-1102 Panel
> Interface Module - or some other Panel Interface that *might* use this
> chip, please keep me in mind....
> Cheers,
> Nick England K4NYW
> www.navy-radio.com
>
>
>