[600MRG] Homebrew Tube Transmitter

[Edward R Cole]

When I wrote "digital VFO" I was thinking of the DDS VFO.  I built 
one when first getting on 600m with a surplus NDB.
attached a couple photos.  It was the ZL1 system.  Looking for the schematic.

I will sell mine if there is interest.

73, Ed - KL7uW

At 10:29 AM 1/28/2018, Steve WD8DAS via 600MRG wrote:

>DDS VFO's can be a good way to drive rigs that were meant for 
>crystals.  Here's some info on ones I've built:
>
>http://www.wd8das.net/DDSVFO/ddsvfo.html
>
>Note my booster amp based on the AD811 chip - amps like this are 
>needed to get the necessary output voltage to drive tube rigs.
>
>For a simpler, fixed-frequency crystal replacement, consider QRP 
>Labs "Prog-Rock" kit:
>
>https://www.qrp-labs.com/progrock.html
>
>Hard to beat for $18 !
>
>You might also be able to use the Epson SGR-8002DC-PTB-ND 
>programmable oscillator chip programmed by Digikey as described by 
>W9RAN in Electric Radio magazine this month.  The IC only costs $4.
>
>
>
>Steve WD8DAS
>
>sbjohnston at aol.com
>http://www.wd8das.net/
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73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com 
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