[TenTec] CorsairII obsolescence - MCU copying

[Glenn]

 Hi Steve,

Great post and thanks for sharing. 

I may have mentioned that I have found a large inventory, 200 pieces, of the original MCU chip in the Corsair II. 
Do you have any experience of pulling the firmware in that chip for a burn into the replacements?


Regards and 73,

Glenn WA4AOS

 


 

 

-----Original Message-----
From: Steve Hunt <steve at karinya.net>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Sent: Fri, Aug 12, 2011 12:57 pm
Subject: Re: [TenTec] CorsairII obsolescence - MCU copying


Folks,



I've now added the iambic keyer functionality to my board using a second 

PIC. I didn't include the keyer memory functionality because I never use 

it, but the connectivity is there if I decide to add it at a later 

stage. I've posted the schematics and the object code, plus a rough 

layout of the major components, on my web site:



http://www.karinya.net/g3txq/corsair_display/



If anyone has a go at building one I'd be very interested in your 

experience; in particular:



1) Does the simple input circuitry work OK with your levels of HFO signal

2) Does the board change the number/levels of any spurii heard in the 

receiver

3) Is the board immune to high levels of RF on Tx

4) Does the "last digit jitter" look about the same as the original



5) Does the keyer speed range seem about right

6) Does the iambic implementation "feel" right. I don't use iambic 

myself so it's difficult to judge if it's correct.



73,

Steve G3TXQ

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