[NLRS] 2304?

[Charlie Betz]

Jerry,

Pyro Joe should also have the Spectrian Driver module - that's what I 
currently use.  It's a few mW in and gets ~30 watts out. Last time I 
bought one they were going for $145, but they are 12 volt units, class 
A, and pretty easy to get going.

Charlie, N0AKC

On 12/28/2016 8:20 PM, Dr. Gerald N. Johnson wrote:
>
>
> I brought home the 2304 1 watt DEMI transverter from MUD in October. I 
> haven't yet fired it up. Been working on antenna ideas some with a 2x3 
> ft WiFi skeleton reflector including variations on K4QF's log period 
> feed that I published in the proceedings for CSVHF and MUD this year. 
> There is still work to be done there.
>
> Living 165 miles from the twin cities and at least that far from the 
> Quad Cities, near the Boondocks
> (https://www.flickr.com/photos/22711505@N05/24151165432)
> looking at the propagation data in the International Microwave 
> Handbook and 2304 contest activity for the last couple years of ARRL 
> contests it appears to me that 1 watt even with 20 dB antenna gain 
> isn't going to make those paths work, there might be a chance of 
> working a couple rovers from home, but that can't run up lots of 
> points. And aiming a 20dB gain antenna won't be easy.
>
> Looks like if I get on I'll need to either rove to Chicago or the twin 
> cities or add a PA, perhaps 50 watts to stay in the low power class in 
> ARRL contests. Looking at VHF conference and MUD publications for the 
> past decade or so, it appears the most popular PAs come from Pyro 
> Joseph as the Spectrian boards, single or grouped for several hundred 
> watts output. Are there other practical options. There was a post a 
> few weeks ago about another package but when I looked at the 
> conversion article it looked almost as easy to build from scratch as 
> to drag the PA from 1900 to 2304. Looking at Mouser.com I see some 
> reasonably priced 25 to 50 watt GAN parts without internal matching so 
> they are good from HF to a few GHz depending on the part. Has there 
> been any work making them work for multiple bands? Most of the solid 
> state amplifier circuits I've seen are single band using shunt 
> capacitors and a length of line, sometimes a quarter wave as a Pi 
> network transformer and low pass filter. That makes them single band. 
> I have some hardware on hand for 902 and 1296 that it would be nice to 
> get on too, but no working power amps.
>
> So what are my options for power on 2304? Used Spectrian, or pay Pyro 
> Joseph's price and go from there?
>
> 73, Jerry, K0CQ
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