[Elecraft] Field Day rig experience

[Rick WA6NHC]

When the 7300 first came out, I took mine to FD for a test, with high 
hopes.  Proximity of antennas was close, on the order of 40 
(tribander)-200' (double double extended Zepp on 40M) separation, power 
output limited to 100 watts.  There was a lack of trees to make more 
space between antennas without exceeding the 1500' limitation (besides, 
the snacks were there).

The 7300 crumpled badly, operation on other bands 'desensed' (for lack 
of an accurate word) the 7300 effectively making it deaf in some cases.  
It didn't matter what band the other stations were operating on, the 
7300 was affected.

No band filters were employed, it was a brutal test as a 'worst case 
scenario'.  The 7300 failed.

The Pro-III the group normally uses, displayed no issues.  No one wanted 
to dis/re-assemble their Elecraft stations from home but I'm sure they'd 
hold up very well or better under the same test.  It wasn't a QRP event, 
so the KX2/3 was not deployed.

However it's limitations, the 7300 does exactly what I intend it to be, 
a cheap light weight radio with 100 watts out that I can take into the 
field, use in the RV or the home shack (since I can control other 
transmitters).  It isn't an 'unworthy' radio, if you don't subject it to 
high RF fields. Eventually, I'll have a second K3 just for the RV but 
for now the 7300 will suffice.

There will be two 7610 on site this year, but I won't be there to 
witness their use.  The Pro-III will be there in case the 7610 doesn't 
hold up.

Rick WA6NHC




On 6/9/2018 9:34 AM, Wayne Burdick wrote:
>> On Jun 9, 2018, at 5:24 AM, Bill <billclarke at nycap.rr.com> wrote:
>>
>> 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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