[Elecraft] Field Day rig experience

[donovanf at starpower.net]

Hi Wayne, 


Few K3 owners are aware that the K3 has built in transmit/receiver 
bandpass filters for each band. That and very low phase noise and 
exceptional receiver dynamic range are why the K3 is such a superb 
Field Day transceiver. 


At the W3AO Field Day we use four K3 transceivers on 20 meters: 
CW, SSB, Digital and GOTA. N one of the 20 meter operators will be 
aware of the other three transceivers u nless one of the other transceivers 
accidentally lands on the same frequency. 


Is there any published data about the performance of the built in 
bandpass filters? 


tks 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Wayne Burdick" <n6kr at elecraft.com> 
To: "Bill" <billclarke at nycap.rr.com> 
Cc: "Elecraft Reflector" <elecraft at mailman.qth.net> 
Sent: Saturday, June 9, 2018 4:34:53 PM 
Subject: Re: [Elecraft] Field Day rig experience 


> On Jun 9, 2018, at 5:24 AM, Bill <billclarke at nycap.rr.com> wrote: 
> 
> Along the line (lightly discussed under "K3- AF Knob") of what rigs are used for dxpeditions and Field Day...... How do the new technology ICOMs (7300 and 7610) do under the "several rigs on the same band" conditions? The size, weight, and cost factor is inviting for the 7300 - BUT!!! Is it up to the job? Close to up to the job? Or, better left home during these events? 


Hi Bill, 

Hopefully you’ll get some responses to this question from those with direct experience. But looking at it theoretically: both the 7300 and 7610 are direct-sampling radios with about 25-30 dB less blocking dynamic range than the K3 or K3S. On Field Day this could have a definite impact when using multiple transmitters on the same band, or even on different bands, depending on antenna spacing and power level used. 

Dynamic range of all of these radios is quantified in the receiver performance table at www.sherweng.com, specifically the fifth column (“100 kHz Blocking”). 

Wayne 



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