[R-390] Comparing R390A w/Period Devices

[Roger Ruszkowski]

Bob,

You posted >>> Plan on at least a 24 hour warmup before you start playing. 

Are you doing DX HF communications from a station or making a cell phone call?

I do not know that 1940 vacuum tubes can even be competitively applied in the receive side of today's state of the art communication hardware. (Vacuum tubes being hard and ware well.) If you are not enchanted with the yellow paint on your sand box toys, swipe your sister's finger nail polish, mix up your own colors and start painting. If you do not have a life style where you can remember to fire it up Thursday evening for the coming week end hobby time these old technology aspects of Amateur Radio may not be your center of attention. Why did that young man just bounce down the yard sale driveway with a shoe box of old nail polish, powder and perfume? Paint base, color pigments, and solvents.

Bob, the new spectrum filtering software applications and the modulation methods are offering acres of new sand box to exploit for our enjoyment. 
It is a good thing there are alternates to the R390 because there are not sufficient R390s to cover current desires. The new technology is where we all need to focus. Love for old stuff is a hobby and life time skill building opportunity. Luddite behavior is self limiting.

Signal processing is fast Fourier transforms and it is the leading edge image generator producing benefits today. Sonograms for babies, broken bones and blood clots. Ground penetrating radar for utility location. If you are going to read a paragraph look to read forward in time.

All of the software defined radio is an educational opportunity with open labs for any person wanting to expand their knowledge in support of their goals. The demand for programmers who understand the math, can work between sockets, and get it done right two weeks ahead of their schedule line as shown daily in the conference room slide show will never be filled with over skilled personnel. Amateur Radio is open and some of the radio active ones doing leading edge real time signal processing are having so much joy with their freely directed self enrichment it could soon become a prohibited behavior. 

Hold a sound vision of the product, its application, number of units to be produced and sold and value in the world market. Thousands of sonogram machines are in use serving millions if not billions of humans. One team took some special collecting stuff to Oak Island one summer as a field trip. That data is looking for someone to render it into a 3D walk through of Earth's first cubic mile. I can not play in the software sandbox, having been employed as a field engineer and senior software acceptance test conductor for the worlds best. Besides it is already 14 years old and 28 or more iterations out of date. Old software is being recycled to recover the electrons for reuse.

I have been learning on R390 hardware since 1960 and still not mastered the compilation of diverse knowledge embedded in one receiver. Reverse engineering alien technology from bumpers left at fender bender sites we can access is not the path forward. 

Bob, truly the prosperity and good life is forward. And it is digital. However the machines are already out living us. Not yet reproducing !!!

3 D printing any one? 

Respectfully

Roger Ruszkowski



-----Original Message-----
From: Bob kb8tq <kb8tq at n1k.org>
To: Stan Gammons <s_gammons at charter.net>
Cc: Steve Toth <stoth47 at yahoo.com>; Steve Toth via R-390 <r-390 at mailman.qth.net>; Roger Ruszkowski <flowertime01 at wmconnect.com>
Sent: Thu, Jan 11, 2018 12:10 pm
Subject: Re: [R-390] Comparing R390A w/Period Devices

Hi

Take a look at the drift requirements for WSPR. There are a couple of modes and
some of them are well past anything the stock 390 can handle. That’s not a knock
on the 390. There are a lot of SDR’s and “lot of buttons” radios that can’t do the
job on those modes either. Plan on at least a 24 hour warmup before you start 
playing. 

Bob

> On Jan 11, 2018, at 11:17 AM, Stan Gammons <s_gammons at charter.net> wrote:
> 
> Yes.  Parking the R-390A on one of the WSPR frequencies, 30 meters most likely, and tinkering with MDSR is one thing I plan to do.  Not sure if I'll have to have a product detector to do that. Guess I'll find out soon :)
> 
> 73
> 
> Stan
> KM4HQE
> 
>