Date   

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


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

Paul Gulliver
 

I feel much the same way as you about sending it back and I've wasted my time dong the mods.
I can recommend the MLA-30 loop amplifier - cheap and cheerful, but it works especially if you make a better loop (larger) to go with it.
Not sure about VLF but HF it's well worth the money

Paul


On 28/01/2020 at 12:23, Stevesweb <stevesweb62@...> wrote:
 I just wanted a VLF/HF loop that would work. I guess I should have sent it back, but I have to much time and money invested (all new coax, attenuators, etc) to be paying additional postage.



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

Stevesweb
 

Chris,
After two email request and a couple of request on this group, since the end of December, still no kits to fix the original VLF/HF loop.

Truthfully I have my doubts the kit will help that much anyway. I just wanted a VLF/HF loop that would work. I guess I should have sent it back, but I have to much time and money invested (all new coax, attenuators, etc) to be paying additional postage.

I need something to make this work, please! I've sent you many emails with my findings when using loop.

What's going to get this working? The Kit, a replacement head unit PCB or just start all over? 

Stephen M. 


Re: VLF/HF Loop Antenna

Chris Moulding
 

Both the VLF/HF and HF/VHF versions can be powered directly from the SDRPlay bias-tee but as the choice of capacitors and inductors in the bias-tee were intended for GPS and L band use the frequency response rolls off around 2 MHz.

Regards,

Chris


Re: VLF/HF Loop Antenna

istvan.fuley@...
 

Hello group members,
Another newbie here, sorry for hijacking this thread, but my question is related to the OP's:
couple of weeks ago I ordered from CCW a HF/VHF loop antenna amplifier. Altough I sent an email to Chris specifying that i need a HF/VHF version which I'm willing to power by an SDR with bias tee, I received last week a VLF/HF version of the amplifier. As I'm mainly focused to HF, I can live with it.

My question is: can I power this amplifier (version 2020 VLF/HF) directly from RSP1A's bias tee, or do I need to use the base unit and separate USB power source?

Thanks, István


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

Kevin Alewine
 

Chris,

On Jan 7 I requested (in this thread) one of your upgrade kits for the HF Loop amplifier. I see quite a few acknowledging receipt of their kits, but so far I have not received mine. Just wanted to double check that you received my request.

73,

Kevin, W0VP


Re: Hf antenna and power supply

JOHN.TEMPLETON3@...
 

Many thanks I look forward to it arriving. 
Regards
John


Re: Hf antenna and power supply

Chris Moulding
 

Hi John,

Your antenna and power supply will be shipped Monday morning.

I'll email the tracking number as soon as I have it.

Regards,

Chris

--
Chris Moulding
Cross Country Wireless
Unit 24562, PO Box 4336, Manchester, M61 0BW, UK
Fax: +44(0)1204 410626
Cell/workshop: +44(0)7752 391908
Secure email: g4hyg@...

On 25 Jan 2020, at 12:48, JOHN.TEMPLETON3 via Groups.Io <JOHN.TEMPLETON3@...> wrote:

Hi Chris any idea when I can expect delivery.
Regards John.


Hf antenna and power supply

JOHN.TEMPLETON3@...
 

Hi Chris any idea when I can expect delivery.
Regards John.


Re: VHF/UHF Multicoupler

Andy Jermaks
 

Hi Chris.
I was just wondering if there is any progress with the multicoupler I ordered on 18th Nov ?
I've not heared anything for a while.

Thanks
Andy.


Modification

Oene Spoelstra
 

I just had the last modification done and i must say it 's a big improvement!  Thanks a lot a lot for sending the upgrade kit to Holland Chris!  I 'm happy with the loop as it is now! 


Re: VLF/HF Loop Antenna

Mike Royal
 
Edited

Hi Paul,
Thank you. That link you gave was most informative.
I did very briefly try using the the MLA-30 with the supplied Bias T, but the noise floor went up considerably.
Maybe I should have concentrated on finding a quieter power supply for it.
I think also I was trying to use the minimum number of parts, Laptop running SDRUno, RSP1A and Loop head.
Cheers, Mike


Re: VLF/HF Loop Antenna

Paul Gulliver
 

Hi Mike,

The reason your MLA-30 didn't work well at lower frequencies may be explained here https://groups.io/g/CrossCountryWireless/message/6551
I also have a MLA-30 and using the supplied bias tee works well at the NDB frequencies - that's around 300KHz - I haven't tried it at lower frequencies.

Whatever amplifier you choose, for the lower frequencies always use an external bias tee.

Paul

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