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Help with Transceiver

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gbowne1

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I am designing and building an amateur radio transceiver that works in the 5 Amateur radio bands from 1,800 KHz to 30MHz.

It is based on a 10-12 year old design that uses a 3 chip computer using the 80C31 and a 27C64. The EPROM is supposed to have 2,008 lines of assembly code.

I am redesigning the circut so that it is not so modular. The original design was designed to be housed in a small chassis. I now have two rackmount chassis that I wish to use with the project, one 12" high and the other 6" high. They both go about 18-22" front to back. The design is spaced over about 7 different PC boards. I would like to either slim it down to about 3 boards or design a planar system using ISA type 8 or 16 bit bus cards. Orignally there were 18 boards in the design, and would now cost over $150 ea. board totally assembled. I still think the best solution would be to desgin it on a 12" x 7, 8 or 9" board with the max. size bein 12" x 12" square.

I am intending on updating to 2006 technology. In the original documentation, I and other have found there are too many errors, missing parts, wrong part #s, and things that just don't seem to add up.

The original design used a 2 row, 16 character per row. LCD display that is backlit. I was planning on doubling that to 4 x 32.

I need to know what I could change the controller to in the update. I was thinking about the Amtel AT89C series or the PIC 16F or other controllers.

I can post text files of component lists from the original design or parts of the original text.

Greg
 

In my opinion doesn’t matter how many rows you are using for the display, when actually the most important part of the transceiver is the RF circuit.
If you want to update the radio to 2006 technology probably you have to start with that part.
 

u can refer to book by Laskar etal from Wiley publications on transceivers' design
 

Thanks for the replies. I'm understanding more of this as we go along. I have a complete set of data sheets on the components of the original design. Hoping this will get me started.

Next question? PL-259 or SO-239 output? or BNC male or female.

Gotta have a connector to an antenna, antenna tuner, external speakers, power supply, linear amplifier, pre-amplifier, dummy load, VSWR/SWR meter, etc.

Oh yeah for you tube gear freaks.. I just got a Heathkit O-10 lab O-scope.

Greg
 

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