[Premium-Rx] Looking for recommendations on high performance VLF receiver.

[David Schofield]

Hi,

Although I've never tried one, I'd guess the Collins R-389/UUR the VLF 
version of the R-390 would do the job rather well.

Cheers,

Dave.S.



On 09/04/2018 13:54, Bingville Canoe and Boatworks wrote:
> Tom,
> I use a Harris RF-590 and am quite pleased with it for beacon chasing.
>
> In addition to being a ham, I’m also a pilot and would warn you that NDBs or beacons are being shut down everyday as the transition to space based approaches continue. Municipalities are spared the expense of maintaining the sites when the instrument approaches become GPS based.
>
> No new aircraft have ADF receivers installed anymore. My point is, that money invested in a low frequency receiver may not yield much in returns going forward if chasing is the sole purpose.
> That being said, as I understand it they (NBDs) are still used outside the US.
>
> Good luck in your search.
>
> Victor
> N4VIC
>
>
> "Who is John Galt"?
>
>> On Apr 9, 2018, at 08:38, Alberto di Bene <dibene at usa.net> wrote:
>>
>>> On 4/9/2018 8:06 AM, Tom wrote:
>>>
>>>    I am looking for recommendations for a premium receiver that will cover VLF. If it can cover say VLF to HF
>>> (maybe 10k/c - 30 Mc, that would be even better!)
>>>
>>>    Due to the nature and spacing of the signals, selectivity is an absolute must!  Signals can typically
>>> be 2 K/c apart from each other, creating all sorts of heterodyne issues.
>> Well, if saying "premium receiver" you mean some boat anchor of 30 (or more) years ago, the discard immediately this my message.
>> If instead you are open to the new possibilities offered by the current state of the art, then I would suggest you to examine these
>> two receivers :
>>
>> Elad FDM-S2 <http://shop.elad-usa.com/sdr-radio/fdm-s2/>   A direct sampling receiver, from 9 kHz to 60 MHz in the first Nyquist zone, and up to the VHF region in undersampling mode.
>>
>> Airspy HF+ <https://airspy.com/airspy-hf-plus/>      A novel architecture, based on a polyphase mixer recently developed by STM, going from 10 kHz up to 31 MHz,
>>                              then from 60 to 260 MHz.
>>
>> Both come with accompanying software that implements brick wall filters, that make the crystal or mechanical filters of the past pale
>> in confront...
>>
>> Clicking on the above links will bring you to the relevant pages of the respective manufacturers.
>>
>> 73  Alberto  I2PHD
>>
>>
>>
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