Steve,
Great project.. Since this post, I have managed to find a large supply of the
MCU chips that Ten Tec used. In fact, over 200 pieces.
Are you able to copy the original MCU firmware into the original chip?
Thanks and 73,
Glenn WA4AOS
w w w dot d s m l a b s dot c o m
glenn at dsmlabs dot c o m
-----Original Message-----
From: Steve Hunt <steve@karinya.net>
To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Sent: Tue, Aug 9, 2011 2:43 pm
Subject: Re: [TenTec] CorsairII obsolescence - MCU copying
I decided I needed another challenge, so last week I taught myself some
PIC assembler programming and bought a Arizona Microchip USB programmer.
The result - a hand-wired matrix board with just a few components which
replaces all the CorsairII MCU frequency readout functionality. Here's a
couple of photos:
http://www.karinya.net/g3txq/temp/corsair_pic1.jpg
http://www.karinya.net/g3txq/temp/corsair_pic2.jpg
I've arranged the board to be a drop-in replacement for the existing
logic board - it's the same size, it will have the same mounting holes,
the header pins are in the same positions, and it drives the existing
LED display. I was surprised how easy it was - all the HFO frequency
counting, adding/subtracting the appropriate IF offsets and the
"normal/reverse" offsets, are performed in one 16F84 18 pin PIC. It took
just 180 out of the 1024 words of programme memory available.
Next step is to add a second PIC to the board to perform the keyer
function :)
When it's all complete I'll write it up as a web page for anyone who may
be interested in the details.
73,
Steve G3TXQ
On 02/08/2011 22:18, Jerry Haigwood wrote:
> Steve,
> You are correct. The AADE display does not include the keyer
> function. However, there are probably at least 10 different keyer boards
> that can be fitted into the Corsair II and all of them will have a lot more
> features than the original keyer. Some of the lower cost ones are made by
> K1EL (K10, K12 board) and Jackson Harbor Press WB9KZY. So far, the display
> on my Corsair II is still working well. However, I have one of the AADE
> displays on hand just in case it decides to take a dump. ;-) What is nice
> about the AADE display is that it should also work with the original
> Corsair. The Corsair used a totally different set of devices to do the
> display function but the inputs are similar to the Corsair II.
> Jerry W5JH
>
>
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