[Elecraft] Field Day Operation

[Fred Jensen]

There are some things in a transmitter that just should never be 
adjustable. There is an optimum rise time and waveshape for minimizing 
clicks.  It is what it is, it's the best you can get, and there is no 
reason whatsoever to change it.

Nearly a lifetime ago at a college ham station, there was a very large 
bright red button on the amplifier rack labeled "Do Not Press."  Most 
every visitor did and discovered that nothing happened ... until they 
let go ... at which point a loud fire bell sounded.  It could be 
silenced by pressing and holding the button.

Give someone a knob and they will turn it.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Steve L wrote on 7/1/2023 10:34 AM:
> George,
> The IC7300 was among the better commercial transceivers in terms of spurious emissions, clicks, splatter, etc. It wasn’t at the top of the list (the K3s is however), but was in the “better” category. However, Rob recommended a change in the CW signal rise time to no less than 6 milliseconds - I forget which menu item it was - but he criticized Icom specifically for a default setting that induced key clicks.
>
> Take a look at this presentation - while it is titled “Receiver Performance What is the Limit Today” he mixes discussion on transmit composite noise with receiver performance.  It was really eye opening for me.
>
> https://www.youtube.com/watch?v=GNh0wP9PlsM
>
> There are others on line as well.
> Steve
> AA8AF
>
>> On Jul 1, 2023, at 12:06 PM, George Thornton <gthornton at thorntonmostullaw.com> wrote:
>>
>> I think this was an Icom 7300 but I am not sure.
>>
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Steve L
>> Sent: Saturday, July 1, 2023 8:47 AM
>> To: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] Field Day Operation
>>
>> I was wondering too about the huge signal in the center of the waterfall…. Hopefully, the ARRL “Clean Signal Initiative” will help encourage manufacturers to clean up these messy transceivers!
>>
>> I recently discovered several presentations by Rob Sherwood - famous for his receiver testing.  I was fortunate to get to meet him at Hamvention this year and thanked him for his work.  His new(?) message:  CLEAN UP THE DIRTY TRANSMITTERS.  And he calls out specific models!  BTW, Elecraft was NOT on the lists, but it is surprising which ‘high end’ transceivers were.  It’s worth reviewing his presentations on the subject - and it kept me from a bad upgrade!
>>
>> Steve
>> AA8AF
>>



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