Date   

CCW Multicoupler for use with a transceiver?

ea6amm@...
 

Hi, Chris,

I'm Gaspar, EA6AMM, a happy costumer (CCW HF Active Loop ANT).

Some time ago I read about a project you were working on about a version of the CCW multicoupler that would be able to be used with a transceiver: https://www.facebook.com/photo.php?fbid=10222437342791909&set=p.10222437342791909&type=3

I would like to know if you keep on working in this project and if there are news about it!

I will be glad to puurchase one as soon as it hits the shop! :-)

73, Gaspar

EAAMM


A Check in

Kev Haworth
 
Edited

Evening folks.
I've not checked in for a while as I've been playing radio from the car with my new IC7300.

However,  Home is a noisy suburb of Liverpool/Bootle UK and I've been experimenting with a QRM eliminator which has enhanced the excellent LAA+.

I'm sat listening to many Stateside stations on 80m SSB at the moment who are working EU and beyond, the EU stuff is easy, however, I do hear the DX occasionally, remarkable for such an inexpensive product.

A new 5 band vertical has been made with a Spiderbeam 12M HD and this will be used on a local beach very soon.

The biggest thing of late is the ability to null out noise with the LAA+, it has helped me immensely, I'll post a video over the next couple of weeks.

Best to all.

Kev

M0TNX


New loop amp under development

Tom Crosbie G6PZZ
 

Hi Chris
You mentioned a little while ago that you were developing a new higher performance loop amplifier.
I was wondering how close this was to production and if you had an idea of pricing yet.
Keep up the good work!
Cheers
Tom G6PZZ


Re: Ccw cardioid loop..update from a user of..

Chris Moulding
 

Thanks for sharing that, Simon.

I did wonder how you isolated the cable feeding the relay shorting the resistor so that explains it.

It certainly sounds like it doesn't affect the antenna pattern.

Regards,

Chris


Re: Ccw cardioid loop..update from a user of..

Simon
 

Hi

First no have not tried the shared apex loop..lack of space in the direction i would want to face it..

Re the switching of the cardioid loop

Cat5 controlled.no coax.
Cat5 has common mode choke at preamp end.all control lines grounded to earth stake via 100nf at common mode choke.
Relay 1 switches the earth from one side of loop to the other..gnd switched.
Relay 2 switches the gnd on/off.again gnd switched.
Relay 3 activities with relay 2.it is mounted in separate box at resistor.it bypasses resistor( or not, depending upon normal loop or cardioid.) wiring to relay 3 is also cat5 with 100uh and 100nf at each end ( preamp and resistor.)

Using 9:1 matching transformer at loop to preamp.

This i may also make switchable in/ out..BUT so far it does not seem to upset normal loop operation leaving it in, so may just leave it.

Yet to fully test on 160m and mw..was having too much fun using it on 80m dx last night and ran out of time.(besides best dx on 160 seems to be gray line at moment, and was far too late for that.)

On 80m made all the difference between hearing N/A over the noise or not..


Re: Ccw cardioid loop..update from a user of..

Chris Moulding
 

Good to hear that after all your work you've found the optimum cardioid loop setup for your location.

Regarding the switching arrangements I can see that you can easily change the antenna direction by swapping the ground connection from one amplifier terminal to the other.

To go back to simple loop configuration have you just disconnected the ground completely and use the loop with it's termination resistor?

Regards,

Chris


Re: Ccw cardioid loop..update from a user of..

Oyster Town (G0IFS)
 

Hello Simon,
Interesting results. Oddly enough i am just off down the garden to arrange switching of the cardioid loop in a similar way. Comparing cardioid loop with 400ft loop on ground it just has the edge-----most of the time. So log will be rolled up this morning and the relays used to compare aerials will be switching direction and from cardioid to normal.
Question---have you tried shared apex loops?


Re: Ccw cardioid loop..update from a user of..

Simon
 

Hi there..hope you all well??!

update continued.

well..i have been using 2 cardioid 2 m loops ( cat5 feed) with remote direction switching..nw or se.
they were broadside 14m apart.

after much experimenting i have come to the conclusion that the combined noise of both preamps ( both loops phased  together, identical lengths of cat 5 etc) added to the background noise they amplify was GREATER than the extra “ gain” one had in having 2 loops..
ie better sn on single loop than on 2.

so a reworking..

now have one cardioid loop nw or se switching and another ne or sw switching.ALSO they switch from cardioid to “ normal” loops remotely..ie from shack i can go nw, ne, se and sw. OR switch them to normal loops with ne and sw or nw and se.
this i did today. 

testing on 80m...working k2rr vy2 etc on 3790..
on my big mag loop they were hard to hear..noise floor was s7.. they s8 ( they giving me s9 plus!..i guess they running beverages etc.)

on normal loop setting about the same sn but weaker.
on cardioid loop setting....
se ..gone..nothing.
nw ..s7-8 noise s3
sw..s4  noise s3
ne ..s4..noise s4

so..works a treat..out preforming my big mag loop on rx..

similar on 160m aiming at locsl smpsu noise..

beginning to really like the cardioid loops now ironing out any teething issues i had..Very usefull to have a lowish angle of takeoff switchable direction low band rx antenna..

mag loop simon g0zen 


Re: Broadband Active Antenna...200 kHz to 1400 MHz

chasb441
 

Can you add me to the list, please Chris?


Re: Broadband Active Antenna...200 kHz to 1400 MHz

Chris Moulding
 

The plan is to restart production of the Broadband Active Antenna as soon as Covid-19 lockdown ends in the UK.

I've redesigned it so that it will work directly from the bias tee on a SDRPlay receiver.

I'm keeping an email waiting list so when the first batch is ready I''ll send emails out before a general release.

Regards,

Chris


Broadband Active Antenna...200 kHz to 1400 MHz

Geoff
 

Chris. Not sure when you plan on re-starting production, but are you taking advance orders or is there a waiting list in readiness for when you resume?


Re: VLF LAA+ or Hi Z AA.

Chris Moulding
 

Hi Vince,

The choice of antenna really depends on your noise situation.

Any antenna will receive wanted signals, in your case you want to reduce the noise so that you can hear them.

If you have noise coming from one defined source then a loop antenna using the VLF Loop Antenna Amplifier will be a good option as you can use one of the two sharp nulls of the loop to null out the noise source.

If the noise is coming from a wider source like VDSL data over telephone lines then another option would be to make a cardioid loop using the Beverage Antenna Amplifier. This gives a wide 90 degree plus angle off the back of the antenna that could be used to reduce noise.

The High Z Active Antenna Amplifier and the VLF/LF/HF Active Vertical antenna make omni-directional vertical antennas that can give incredible results in very quiet rural or beach locations. Unfortunately they would be swamped by the noise at your location.

Another alternative would be to try a vertical antenna with loop counterpoises like the one I wrote about in my RadCom article of October 2020.I'm still using a version of this for transmit and receive at home as it reduces the very local noise from neighbouring houses. My current version uses a 10m high wire rather than the more complicated G7FEK vertical I used for the article. We can supply the HF Antenna Isolator as a transformer for the loop counterpoise antenna.

The link to the article is: http://www.crosscountrywireless.net/202010 loop counterpoises.pdf

Regards,

Chris


Interesting YouTube video on the Loop Antenna Amplifier + by James Day M0GQC

Chris Moulding
 

There is an interesting YouTube video comparing a loop antenna made using the Loop Antenna Amplifier + with a end fed half wave inverted V for 80m.

It's made and presented by James Day M0GQC who is producing YouTube videos on a range of amateur radio topics.

The link to the video is: https://youtu.be/zHf4fyUPxto

Regards,

Chris


Re: Question about order

Darren Hennig
 

Thanks Chris! Have a great weekend and work safe!

 

From: Chris Moulding
Sent: March 11, 2021 13:08
To: CrossCountryWireless@groups.io
Subject: Re: [CrossCountryWireless] Question about order

 

Hi Daniel,

Due to the Covid-19 lockdown we take a bag of parcels to the Post Office and collect the tracking numbers a few days later when we take another batch.

Your order was shipped earlier this week and I should email your tracking number tomorrow when the next bag of parcels is ready to ship.

Regards,

Chris

 


Re: CCW Multicoupler

Chris Moulding
 

I would suggest the VHF/UHF version of the Multicoupler for use with a VHF/UHF antenna.

At present due to the Covid-19 lockdown we have limited access to the workshop so products that take a lot of workshop assembly and custom products are not being made.

The standard Multicoupler has one BNC input with 5 BNC outputs.

The ground stud on the Multicoupler is to aid lightning protection. When it's used in a professional antenna installation all incoming antenna cables will be bonded to the tower structure and grounded at the entry point to the station. Usually the ground stud is bonded to this entry point.

The Multicoupler has a 20 kA gas discharge tube on the antenna input and bidirectional transient voltage suppressor diodes on the outputs to avoid damage to the Multicoupler and the receivers connected to it.

It needs a good ground connection for the internal protection circuits to work efficiently.

Regards,

Chris


Re: Question about order

Chris Moulding
 

Hi Daniel,

Due to the Covid-19 lockdown we take a bag of parcels to the Post Office and collect the tracking numbers a few days later when we take another batch.

Your order was shipped earlier this week and I should email your tracking number tomorrow when the next bag of parcels is ready to ship.

Regards,

Chris


Question about order

Daniel Fox
 

Hi, I recently placed an order thru your website for a Loop Antenna Amplifier.  I am wondering if I will get any tracking information.  I got the notice from Paypal that a payment had been made, but nothing else.  I have everything set up for the amplifier and look forward to experimenting with it.

73,
Daniel
KF9ET


Re: VLF/LF/HF Active Vertical Antenna...5 kHz to 30 MHz Discontinued!

Juan A. Bertolin
 

Here from Spain, I am interested too

EA5XQ, Juan


CCW Multicoupler

ghwmawdesley@...
 

I am considering purchasing a CCW multicoupler and would appreciate your opinions on which one would be the most appropriate in the following circumstances.

I would like to run two scanners and an Airspy SDR from one VHF/UHF Antenna.
 
I also run an Airspy HF 2 Discovery from a Wellbrook active loop, I do not intend to run any more receivers from the loop.
 
I am considering the VHF/UHF as I do not intend to use it on HF and it has HF filtering.

An N connector input is preferred, though not essential, however, would that reduce the number of BNC outputs ?
 
Could you advise me on earthing it, for example, would it require a copper earth stake into the ground?

TIA

George


Re: VLF/LF/HF Active Vertical Antenna...5 kHz to 30 MHz Discontinued!

Stephen
 

Hello Chris

If you are going to make another batch, then I will also have one please.

Kind regards

Stephen

61 - 80 of 7736