[Elecraft] Tuners and spurious responses

[W2xj]

You can easily build a highpass filter.   

Sent from my iPad

> On Dec 22, 2018, at 10:55 PM, Bob Nielsen, N7XY <n7xy at n7xy.net> wrote:
> 
> DLW Associates makes a filter which has 40 dB rejection across the entire broadcast band.  It is available from DX Engineering.
> 
>> On 12/22/18 7:20 PM, Al Lorona wrote:
>>  No, not a null, but a rolloff. When I quoted -40 dB I didn't mean a notch at one frequency, but the stopband level reached by the time you get well into the broadcast band. So that would be -40 dB on all AM stations below a certain frequency.
>> The K3 is a good receiver, but every receiver has its limits and certainly the K3 will suffer once an interfering signal gets above a certain level.
>> A trap or stub would work, but my point was that it would be unnecessary if using a link-coupled tuner. Attenuating a 50 kW station by 40 dB makes it  sound like a 5 W station.
>> Al  W6LX
>> 
>> 
>>    
>>>>> That said, is suppose it IS possible that a tuner/antenna combination
>>>>> just happened to have a deep null right on the frequency of a nearby
>>>>> broadcast station
>> 
>> 
>>   ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to n7xy at n7xy.net
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w2xj at w2xj.net