[Lowfer] Can I expect to receive ....

[WD8ARZ]

Ok Pat, think I looked at that some time back, but will look at John's 
design in the reflector area for follow up.

Only have BCI when I turn the SDR-IQ preamp to full, and not to bad 
then. I have a local station, so not surprised. Will try my tuner down 
there and see what that will do to help narrow the pass band. I can fab 
up a BCI filter out of my bench repair parts .......

Bill

On 2/1/2013 3:04 PM, pbunn at patbunn.com wrote:
> The antenna impedance at LF is many thousand of ohms or more. A simple 
> FET impedance transformer will greatly improve your reception. John, 
> known here as JD has a very good design that was published in the 
> Lowfer. You will also need a good filter to cut the strong AM 
> broadcast signals or they will overload your receiver and generate IMD 
> signals. Johns transformer also has a filter. On LF signal 
> conditioning before the receiver is a must.
>
> Pat
> N4LTA
>
> -----Original Message----- From: WD8ARZ
> Sent: Friday, February 01, 2013 7:44 PM
> To: Discussion of the Lowfer (US, European, &UK) and MedFer bands
> Subject: Re: [Lowfer] Can I expect to receive ....
>
> Hello Pat, appreciate the advice. Will look into that.
>
> I use that antenna for transmitting on now 1.8 Mhz - 54mhz and of course
> I have to match it to 52 ohms. However I know going below 500 khz I will
> have to use a different tuner than what I normally use.
>
> If you all are also on the LF group, I did get the photo to display with
> my email there.
>
> 73 from Bill - WD8ARZ
>
> On 2/1/2013 12:03 PM, pat bunn wrote:
>> On 2/1/2013 11:43 AM, JD wrote:
>>> Anything's worth a try, Bill, but be aware there are two big factors 
>>> that
>>> will affect your chances of receiving anyone at LF, apart from the
>>> receiver's own properties.  First is how much locally originated 
>>> noise will
>>> be picked up at LF by your antenna, and the other is whether you can 
>>> match
>>> the antenna's impedance to something approximating 50 ohms at the
>>> frequencies of interest.  Best of luck.
>>>
>>> John
>>> ______________________________________________________________
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>> I'd highly recommend John Davis's preamp/impedance match circuit to 
>> get that wire matched to 50 ohms.  Otherwise you will deal with a 
>> very lossy antenna ay LF.
>>
>> Pat
>> N4LTA
>> ______________________________________________________________
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>
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