[VHFcontesting] 222 and 902/3 transverters

[Paul Kiesel]

Microwave Modules used to sell a nice little 384 MHz box that put out 0.5 watts. Back when folks used to multiply up with varactors, here's what you could get:

384 x 3 = 1152
1152 + 144 = 1296
1152 x 2 = 2304
1152 x 3 = 3456
1152 x 5 = 5760

To get on phone, you would reactance or frequency modulate the oscillator. At the destination frequency, the signal was detected and then digitally divided back down by the amount that it was multiplied up with RF. Then you could tell what was being said. Now, people use transverters and get far better results.

K7CW


--- On Fri, 10/24/08, Nate Duehr <nate at natetech.com> wrote:

> From: Nate Duehr <nate at natetech.com>
> Subject: Re: [VHFcontesting] 222 and 902/3 transverters
> To: vhfcontesting at contesting.com
> Date: Friday, October 24, 2008, 11:24 AM
> kb7dqh at donobi.net wrote:
> > Do just a bit more math, and the 850 Mhz LO can be
> used with a 446 Mhz IF
> > to put you on 1296 as well!
> 
> What is interesting about this e-mail chain is that people
> seem to be 
> "discovering" these mathmatical relationships
> between our bands... That 
> were always there to begin with.
> 
> It was for this very reason these bands BECAME the ham
> bands above 50 
> MHz!  (GRIN)
> 
> The pioneers years and years ago had to build their own
> transverters... 
> thus, why not choose frequencies that are all related so
> you can build 
> it once, not many times?
> 
> Think about it... history repeats.  :-)
> 
> Nate WY0X
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