Date   

Re: Upgrade kit not received yet

Guy Atkins
 

Thank you very much Chris! I appreciate it.

Best wishes,

Guy


Re: Upgrade kit not received yet

Chris Moulding
 

Hi Guy,

We shipped a kit out to you by letter post but quite a few have gone missing.

I'll send another one today as a small parcel in a padded bag.

Regards,

Chris


Re: Upgrade kit not received yet

Guy Atkins
 

Hi Chris,

Would you mind checking to see if my upgrade kit has shipped yet? I requested one in mid-January, for a VLF/HF loop that was purchased and received in December. I sent you a private message via the group to request the kit.

Thanks,

Guy Atkins
Puyallup, WA USA


Loop Antenna Amplifier to be reviewed in Radio User magazine

Chris Moulding
 

The Loop Antenna Amplifier is to be reviewed in the Radio User magazine.

They have also posted a preview on the Radio Enthusiast web site that covers Radio User and Practical Wireless magazines.

https://www.radioenthusiast.co.uk/news/cross-country-wireless-loop-antenna-amplifiers/

https://www.radioenthusiast.co.uk/

Regards,

Chris


Re: Loop Antenna Amplifier: Indoor Unit box. Why not?

Chris Moulding
 

When I designed the Loop Antenna Amplifier it was intended to compete with the MLA-30 loop antenna on price.

To keep the cost down while still keeping the polycarbonate outdoor enclosure I decided to supply the base unit as a PCB. The base unit was designed and supplied with nuts and washers so that it could be mounted by users into a simple enclosure with just three holes drilled. Several customers have sent me photos of how they have built some very nice enclosures for the base unit.

We could build the base unit into the Hammond enclosure we use for the Multicoupler but this would add an extra £25 or $32.57 to the price of the antenna. If there is any interest I could add this as an option.

As a separate project I'm designing new versions of the Loop Antenna Amplifier and Broadband Active Antenna to work directly with SDRPlay receivers without requiring a base unit. I've got prototypes of both antennas working well but I'm not releasing any other information or taking orders until I can test a set of samples built with a production PCB.

Regards,

Chris


Re: New enclusures

Chris Moulding
 

If you are using a shielded loop then the Loop Antenna Amplifier head unit PCB can be mounted in a shielded metal enclosure. The head unit has two separate grounds separated by a common mode filter. Without running some tests I'm not sure which ground to connect to the metal enclosure so try running a wire from the box to either ground plane on the board to find which one is most effective at reducing noise with your shielded loop. I suspect that the enclosure to the ground plane on the loop rather than the coax input will give best results.

The base unit can also be mounted in a metal enclosure. Connect a wire from the ground on the board (USB shield) to the metal box. You can also connect the metal enclosure on the base unit to ground to reduce noise and conduct any static electricity on the antenna to ground.

A shielded loop will work well at 60 kHz. The problems with them occur at higher HF frequencies where the loop inductance and capacitance to the shield form a resonant circuit.

Regards,

Chris


New enclusures

John W Cress <jwcress2@...>
 


Chris, I'm planning to use my recently aquired loop outside with a large coax based shielded loop. I'm also planning to remount both PCB's in cast aluminum enclosures which are both just large enough for the boards. Do you see any problems with the metal enclosures affecting the tuning? My interest is primarily with 60Khz WWVB, to the extent that if it works well at 60Khz I have no concerns about the remainder of the spectrum.

John K0GCJ


CCW Vertical Dipole

WQ2H <wq2h@...>
 

Chris,

Just a quick note - the vertical dipole is working splendidly on 30m Rx (not too shabby on 160 either).

I've never worked Tx on 30m before, so my project this weekend is to finally cut a dipole for 10.136. Wish me luck !

Thanks again !

73
Jim, WQ2H


Re: HF Preselector Power

WA8LMF
 

On 2/12/2020 12:36 PM, David Cutter via Groups.Io wrote:
 

On Wednesday, February 12, 2020, 05:21, Ed Pusey <esptwo@...> wrote:

Friends, 

I just received my HF preselector. It included a power connector cable without power supply. The connector is either not the correct size, or it is really, really tight, so I have not tried to force it on. In any case, reading the specs on the CCW web site, it appears the unit needs  12 mA from a 12 - 15V DC supply. Does anyone in the group (preferably a user in the United States) have a recommendation on what to purchase, assuming a power supply is required? My simple searches for a power supply that meets the specs produced no results. The best I can come up with is something like this: https://www.amazon.com/SoulBay-Universal-Switching-Selectable-Suitable/dp/B01ISM267G/ref=pd_sbs_23_4/147-2735014-2765860?_encoding=UTF8&pd_rd_i=B01ISM267G&pd_rd_r=02405990-d5c9-415e-82f6-28a632491675&pd_rd_w=iT2GV&pd_rd_wg=hPAYK&pf_rd_p=7cd8f929-4345-4bf2-a554-7d7588b3dd5f&pf_rd_r=1AXDK9399SAF9C117RBF&psc=1&refRID=1AXDK9399SAF9C117RBF

and it has an output of 1.2 amps, well above 12mA.

 

I have one of this exact supply, bought on Amazon.   I use it for "smoke-testing" newly-built gadgets, GPS receivers, soundcard  interfaces, etc.  Since the current is far more limited than the nearly unlimited amps of my main ham shack supply (20A 12 VDC supply in parallel with Exide 120 AH 12 VDC trolling motor battery), the potential for smoke and fire from mis-wired newly-built devices is obviously far less!   

The flexibility of choosing a range of voltages (3 VDC or 5 VDC for GPS devices, 8 VDC for powering many hand helds, 12 VDC for TNCs & sound card interfaces, etc) is great.  In addition to the various size coaxial tips, it also comes with a "tip" that has simple + and - screw binding posts on it.  I connect this one to a short length of red/black zip cord to a pair of Anderson PowerPoles.  I can then use it as a low-current battery maintainer.

So far I have not noticed any noise problems on HF with this supply.


Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
Home Page:          http://wa8lmf.net

-----   NEW!    60-Meter APRS!   HF NVIS APRS Igate Now Operating  ------
   <http://wa8lmf.ddns.net:14447/>



Live Off-The-Air APRS Activity Maps
   <http://wa8lmf.net/map>

Long-Range APRS on 30 Meters HF
   <http://wa8lmf.net/aprs/HF_APRS_Notes.htm>



Re: HF Preselector Power

WA8LMF
 

On 2/12/2020 6:27 AM, Chris Moulding wrote:


We can supply a RF quiet 12 V power supply at the following link:

http://www.crosscountrywireless.net/12v_power_supply.htm

Regards,

Chris
_._,_._,_


What exact ferrite cores are you using on the leads of the supply you are selling?


How much effect do they have on noise at HF and VHF?



Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
Home Page:          http://wa8lmf.net

-----   NEW!    60-Meter APRS!   HF NVIS APRS Igate Now Operating  ------
   <http://wa8lmf.ddns.net:14447/>



Live Off-The-Air APRS Activity Maps
   <http://wa8lmf.net/map>

Long-Range APRS on 30 Meters HF
   <http://wa8lmf.net/aprs/HF_APRS_Notes.htm>




Re: HF Preselector Power

David Cutter
 

At that current I would be tempted to run a pack of AA cells for the ultimate quiet power supply.  I doubt you will find a "modern" power supply as quiet.

David G3UNA

 

From: CrossCountryWireless@groups.io [mailto:CrossCountryWireless@groups.io] On Behalf Of Ghostwriter66 via Groups.Io
Sent: 12 February 2020 11:44
To: CrossCountryWireless@groups.io
Subject: Re: [CrossCountryWireless] HF Preselector Power

 

Be careful the power supply you get does not create EMI or RF interference noise ... it will kill the signal 



On Wednesday, February 12, 2020, 05:21, Ed Pusey <esptwo@...> wrote:

Friends, 

I just received my HF preselector. It included a power connector cable without power supply. The connector is either not the correct size, or it is really, really tight, so I have not tried to force it on. In any case, reading the specs on the CCW web site, it appears the unit needs  12 mA from a 12 - 15V DC supply. Does anyone in the group (preferably a user in the United States) have a recommendation on what to purchase, assuming a power supply is required? My simple searches for a power supply that meets the specs produced no results. The best I can come up with is something like this: https://www.amazon.com/SoulBay-Universal-Switching-Selectable-Suitable/dp/B01ISM267G/ref=pd_sbs_23_4/147-2735014-2765860?_encoding=UTF8&pd_rd_i=B01ISM267G&pd_rd_r=02405990-d5c9-415e-82f6-28a632491675&pd_rd_w=iT2GV&pd_rd_wg=hPAYK&pf_rd_p=7cd8f929-4345-4bf2-a554-7d7588b3dd5f&pf_rd_r=1AXDK9399SAF9C117RBF&psc=1&refRID=1AXDK9399SAF9C117RBF

and it has an output of 1.2 amps, well above 12mA.

Suggestions? Many Thanks all. you.

Ed


Re: HF Preselector Power

Ed Pusey
 

Thank you Chris. My order will be on the way momentarily. :-)

Ed

On Wed, Feb 12, 2020 at 6:27 AM Chris Moulding <chrism@...> wrote:
Hi Ed,

The DC connector is a 2.1mm socket. The supplied connector will fit but it is a tight fit. Before dispatch it was tested with the cable supplied to confirm that both Preselector and cable were working.

The power supply you link to on Amazon will work with the Preselector but may generate RF interference if it is close to your antenna.

We can supply a RF quiet 12 V power supply at the following link:

http://www.crosscountrywireless.net/12v_power_supply.htm

Regards,

Chris



--
Ed Pusey

esptwo@...


Re: HF Preselector Power

Ghostwriter66
 

Be careful the power supply you get does not create EMI or RF interference noise ... it will kill the signal 




On Wednesday, February 12, 2020, 05:21, Ed Pusey <esptwo@...> wrote:

Friends, 

I just received my HF preselector. It included a power connector cable without power supply. The connector is either not the correct size, or it is really, really tight, so I have not tried to force it on. In any case, reading the specs on the CCW web site, it appears the unit needs  12 mA from a 12 - 15V DC supply. Does anyone in the group (preferably a user in the United States) have a recommendation on what to purchase, assuming a power supply is required? My simple searches for a power supply that meets the specs produced no results. The best I can come up with is something like this: https://www.amazon.com/SoulBay-Universal-Switching-Selectable-Suitable/dp/B01ISM267G/ref=pd_sbs_23_4/147-2735014-2765860?_encoding=UTF8&pd_rd_i=B01ISM267G&pd_rd_r=02405990-d5c9-415e-82f6-28a632491675&pd_rd_w=iT2GV&pd_rd_wg=hPAYK&pf_rd_p=7cd8f929-4345-4bf2-a554-7d7588b3dd5f&pf_rd_r=1AXDK9399SAF9C117RBF&psc=1&refRID=1AXDK9399SAF9C117RBF

and it has an output of 1.2 amps, well above 12mA.

Suggestions? Many Thanks all. you.

Ed


Re: HF Preselector Power

Chris Moulding
 

Hi Ed,

The DC connector is a 2.1mm socket. The supplied connector will fit but it is a tight fit. Before dispatch it was tested with the cable supplied to confirm that both Preselector and cable were working.

The power supply you link to on Amazon will work with the Preselector but may generate RF interference if it is close to your antenna.

We can supply a RF quiet 12 V power supply at the following link:

http://www.crosscountrywireless.net/12v_power_supply.htm

Regards,

Chris


HF Preselector Power

Ed Pusey
 

Friends, 

I just received my HF preselector. It included a power connector cable without power supply. The connector is either not the correct size, or it is really, really tight, so I have not tried to force it on. In any case, reading the specs on the CCW web site, it appears the unit needs  12 mA from a 12 - 15V DC supply. Does anyone in the group (preferably a user in the United States) have a recommendation on what to purchase, assuming a power supply is required? My simple searches for a power supply that meets the specs produced no results. The best I can come up with is something like this: https://www.amazon.com/SoulBay-Universal-Switching-Selectable-Suitable/dp/B01ISM267G/ref=pd_sbs_23_4/147-2735014-2765860?_encoding=UTF8&pd_rd_i=B01ISM267G&pd_rd_r=02405990-d5c9-415e-82f6-28a632491675&pd_rd_w=iT2GV&pd_rd_wg=hPAYK&pf_rd_p=7cd8f929-4345-4bf2-a554-7d7588b3dd5f&pf_rd_r=1AXDK9399SAF9C117RBF&psc=1&refRID=1AXDK9399SAF9C117RBF

and it has an output of 1.2 amps, well above 12mA.

Suggestions? Many Thanks all. you.

Ed


Hf antenna and power supply

JOHN.TEMPLETON3@...
 

Hi Chris all arrived safely and working well.
Just awaiting set of aerial poles which should give me about 12 ft above roof level to bottom of aerial, as it's an upstairs flat that's  a fair height.
So many thanks for a great item.
Regards
John.


Re: Upgrade kit for VLF/HF and early versions of the Loop Antenna Amplifier

Stevesweb
 

My address has not changed since I received the first shipment. If you send it to the shipping address I should get. 


Re: Upgrade kit for VLF/HF and early versions of the Loop Antenna Amplifier

Paul Newland
 

Hi All
This is not a "loaded" question.
I DO understand that some have had problems with upgrading their original VLF/HF amplifiers and do sympathise.
However, may I ask whether anyone who has successfully carried out the upgrade has experienced any improvement at LW  and MW.
Personally, I am primarily interest in  the HF spectrum as offered by the HF/VHF amp and which is excellent in use (in my case overwhelmingly for HF), higher frequency ranges being covered by additional antennae and I can cover the LW and MW bands, pretty well I feel,  with a Wellbrook.
However, in view of the very successful performance of the HF/VHF version, I wondered whether the upgraded VLF/HF version would provide enhanced capability in those ranges.
Thank you if you waded through this.

Best Wishes
Paul



On Tue, 28 Jan 2020 at 14:32, chipbutty via Groups.Io <stellablade72=googlemail.com@groups.io> wrote:
Btw Chris - Thanks for the upgrade kit you sent out recently. You sent me another by mistake the other day! I received a card from Royal Mail informing me a package was waiting for me but they couldn't deliver it because the postage was insufficient (£1.51 owed). I had no idea what it could be as I hadn't ordered anything. I paid the £1.51 and was quite disappointed when I saw what it was! Lol. Oh well, it will come in handy as spares. It came in a letter. It must have have broken RM's dimension or weight rules.


Re: Upgrade kit for VLF/HF and early versions of the Loop Antenna Amplifier

chipbutty
 

Btw Chris - Thanks for the upgrade kit you sent out recently. You sent me another by mistake the other day! I received a card from Royal Mail informing me a package was waiting for me but they couldn't deliver it because the postage was insufficient (£1.51 owed). I had no idea what it could be as I hadn't ordered anything. I paid the £1.51 and was quite disappointed when I saw what it was! Lol. Oh well, it will come in handy as spares. It came in a letter. It must have have broken RM's dimension or weight rules.


Re: Upgrade kit for VLF/HF and early versions of the Loop Antenna Amplifier

Chris Moulding
 

Stephen,

We have already sent two kits out to you by letter post. It's possible that they may have gone by surface mail to the United States.

Can you confirm that your address hasn't changed as we are using the same address that we shipped the original amplifier to.

I'll send another one today as a tracked parcel so that we can confirm that it arrives.

Regards,

Chris

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