Re: New kits
Don Wilhelm <w3fpr@...>
Several 'ideas' and comments --toggle quoted messageShow quoted text
If the goal is for a good, simple, single band VXO or VFO controlled transceiver (or just a receiver by leaving the TX components out), the SWL series transceivers are a good basis for the design. The old Manhatten 101 project is exactly that.
For something a little more exotic, put in a variable bandpass IF filter as is done in the Elecraft K1.
If the desire is to expand to a multiband transceiver, a design based on the architecture of the Elecraft K1 would be my choice.
The Elecraft K1 basic design is an easy 2 - SA612 mixer design at its basic form. The "magic" is in the use of a fixed range VFO mixed with a crystal oscillator to produce the local oscillator frequency - that makes it multiband capable.
Yes, a real K1 has a microprocessor that will do a lot of things, like the LCD display, internal keyer, sidetone generation, power level control and other niceties, but those things can be sacrificed for a more simple design - the basic RF section is not that complex.
On 6/6/2015 7:19 PM, hamshack@... [4sqrp] wrote: