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Re: [RFI] SO2R and 2nd harmonic

To: "rfI@contesting.com" <rfI@contesting.com>
Subject: Re: [RFI] SO2R and 2nd harmonic
From: Gary <gary_mayfield@hotmail.com>
Date: Tue, 26 Sep 2017 00:43:21 +0000
List-post: <mailto:rfi@contesting.com>
Check out the numbers for these guys!

https://apache-labs.com/


These are the cleanest transmitters I have seen.


73,

Joe kk0sd

________________________________
From: RFI <rfi-bounces@contesting.com> on behalf of Kenneth G. Gordon 
<kgordon2006@frontier.com>
Sent: Monday, September 25, 2017 1:42 PM
To: rfI@contesting.com
Subject: Re: [RFI] SO2R and 2nd harmonic

Excuse me, but I firmly believe that there is one very important factor 
involved here which,
at least so far, no one has mentioned.

And that is the horrendous amount of broad-band noise almost all modern 
transceivers
output. The only modern transceiver I know of in which this issue has been 
addressed
directly by the designers and dealt with properly is the Elecraft K-2 and its 
cousins.

A recent study on this issue by, I believe, a German ham, proved conclusively 
that ALL
other modern transceivers output a terrible amount of broadband noise, and any 
"good"
linear amp will make this problem far worse.

I will attempt to find that study and post a link to it here as soon as I can.

I believe he showed that this noise output significantly raises the noise 
floor, even far from
the location of the transmitter itself.

Perhaps this is an important factor in this so-called "RF flooding" issue. At 
any rate, I
believe it should be investigated.

Ken W7EKB

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