[TenTec] CorsairII obsolescence - MCU copying

[Bill Harris]

WOW Steve.  As they say "Atta Boy"!  No doubt this would work for the Corsair (I) and maybe, some of the earlier rigs? Sure would extend their life.   Any chance you can kit this mod?Later
BillHarris-w7kxb

> Date: Tue, 9 Aug 2011 19:42:44 +0100
> From: steve at karinya.net
> To: tentec at contesting.com
> 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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