Category Archives: Accessories

Eric seeks advice: Building a directional mediumwave antenna for the RSP2 SDR

Many thanks to SWLing Post contributor, Eric McFadden (WD8RIF), who writes with the following question:

A request for assistance.

After comparing the reception of the RSP2 and 1/2 doublet to the reception of the County Comm GP-5 SSB and its little external ferrite-bar, I’ve decided I probably want to make some sort of directional antenna to use on AMBC with the RSP2. A wire loop, perhaps, or some sort of ferrite-bar thing, that connects to the RSP2’s Hi-Z input.

[Perhaps SWLing Post readers can suggest] options and then I can get the needed bits at the 2017 Hamvention.

Post readers: if you can offer Eric suggestions, or point him to antenna plans, please comment! I do believe he would rather build an antenna than simply buy one and he’s looking to permanently mount this antenna outdoors.

Any leads on this Sony plug?

Many thanks to SWLing Post reader, Paul Beckett, who writes with the following question for our community:

Hi Thomas

I am hoping you may be able to help identify the fly lead plug which fits on the jack plug of the Sony mains adapter lead for the 2001D. It terminates in a four pin female socket but i cannot find any description of it on the internet.

Appreciate any info if you recognise it. It is definitely part of the 2001D “kit” as the plug is clearly marked “Sony” and was among my radio “bits”.

Regards

Paul

Post readers: can anyone help Paul identify this particular 2001D plug so that he can search for a replacement on the Internet? If so, please comment!

The new Cross Country Wireless HF Preselector

(Source: Southgate ARC)

Cross Country Wireless release HF Preselector

Cross Country Wireless have released a HF Preselector.

It is a passive high Q design that does not use an amplifier or external power.

It tunes from 0.5 to 52 MHz.

It is ideal for use with simple SDR receivers like the RTF-SDR dongle with upconverter or SDRPlay. It can also be used with the new receiver socket modification on the IC-7300.

The web page has more details including network analyser plots showing the selectivity of the Preselector.

The web page is:
http://www.crosscountrywireless.net/preselector.htm

Advice on cancelling locally generated noise

An SWLing Post reader recently contacted me with the following question:

“What devices work well to cancel out local RFI? I’ve been told that both the Timewave ANC-4 and a number of BHI products are all worth considering.”

Unfortunately (or fortunately, for me) I’ve no experience with outboard DSP or noise cancelling devices because I live in such an RFI-free area.

I know this reader already has a Wellbrook Loop, but he’s looking for a way to even increase noise mitigation further at his home listening post.

Post Readers: Can you help guide him?  Please comment with your experience. Is a product like the Timewave or BHI the next logical step? If not, what is?

SDRplay RSP-1 OEM Metal Case

Many thanks to SWLing Post contributor, Rafman, who writes:

The SDRplay RSP-1 OEM Metal case is ready for order and shipment Worldwide

Includes:

  • 1x Black aluminum metal enclosure with two labeled side panels, 1x Broadcast FM band-stop filter plus SMA Male to SMA Male barrel adapter,
  • 1x Black semi-hardshell carry case,
  • 1x Thermal pad to keep the RSP-1 cool and mechanically stable inside the enclosure and
  • 1x Accessory set including enclosure screws, GND lug bolt set and 3M anti-slip rubber feet.
    Can be used to upgrade the SDRplay RSP-1 ONLY to a metal enclosure. Helps block RF interference.

Note that owners of the very first RSP-1’s with F-Type connectors may require an additional F-Type pigtail adapter, or a MMCX to SMA pigtail to be able to use the BCFM filter internally. The BCFM filter can still be used externally.

Click here to view the RSP-1 metal case at Amazon.com (availability expected March 27).

Thank you, Rafman! I have the first generation RSP-1, so appreciate the note about using the filter internally via an adapter. That’s a nice enclosure.