[Elecraft] Fwd: K4 SDR version

[Joe Subich, W4TV]

On 2019-07-23 7:42 PM, Wes wrote:
> Why escapes me, as there is no one to service in my direction.

Typically AM patterns are designed to put nulls in the direction
of stations that a secondary user of a frequency must protect.
 From the list of stations on 1030, I suspect KVOI is required to
protect WBZ (Boston), KTWO (Casper WY) and possibly XEQR (Mexico
City).

Looking at the protection requirements along with what is possible
when it comes to antenna patterns will often lead one to understand
the reason for "crazy" patterns (particularly nigh time patterns).

73,

    ... Joe, W4TV


On 2019-07-23 7:42 PM, Wes wrote:
> I should add that KVOI runs a directional antenna with the (crazy) 
> pattern peak pointed in my direction.  Why escapes me, as there is no 
> one to service in my direction.
> 
> 
> On 7/23/2019 2:58 PM, Wes wrote:
>> Ralph,
>>
>> KVOI is -7 dBm here on my 40-meter dipole.  On the 160 antenna it's 
>> about 3 dB higher but that's folded over for the lightning season,  
>> Despite running 7 dB more power and not being a much different 
>> distance KUAZ is about 13 dB weaker.  I guess that's why the 
>> commercial owner gave it to the U of A, took a tax write off and lets 
>> the taxpayers fund it.  KFLF, (50 KW) further away still is -6 dBm.
>>
>> My SDR-IQs handle this just fine.  I briefly owned an RSP-2 Pro that 
>> folded up like a cheap suitcase and was unusable on any frequency and 
>> it supposedly has a BCB filter.  I suspect that the K4 will be unfazed.
>>
>>
>> Wes  N7WS
>>