Best AM Antenna / Indoor or Out (Broadcast Band)

Status
Not open for further replies.

ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
23,696
Location
Bowie, Md.
You will find that there are as many opinions on this as there are AM radios out there, heh.

If you are talking indoor antennas, then loops are the way to go. Here is our loops wiki, and no doubt there might be more MW loops out there...there's a few commercial units, but a BUNCH of homebrewing...


If you are serious about getting into MW DXing and want to touch base with other users, your best bet is to do some homework - Google is your friend, as is the above page. The Ontario DX Association covers MW topics (it has both a reflector and a Facebook page), and there are 2 specialty clubs in North America - the International Radio Club of America and the National Radio Club. The IRCA has its own reflector on groups.io, and I see the National Radio Club has a Facebook page.

You will find no better way to learn about indoor loops than talking to the folks that play with them

'Nuff said....Mike
 

Groeteschele

Member
Joined
Apr 6, 2020
Messages
46
Location
Munich
Hello. I find by personal experience and talk with MW hobby listeners for local and DX monitoring is only outside house is best to hear radio stations.

www.lfengineering.com

M-601C Dipole

and

M-606 Loop

www.amradioantennas.com

PK HD Series Loops

Loops antennas work best with good quality rotor on grounded tower. Thank you.
 

Boombox

Member
Joined
Sep 2, 2012
Messages
941
Depends on the radio you are using, and whether you have real estate available for a long, outdoor antenna.... or the funds available to finance a commercial loop antenna.

If you are using a portable MW receiver, a loop is the best way to go. You can either buy one for $50 US or less, or build one. You can hear a lot with a decent MW portable and loop antenna combination.

If you're using an HF / MW comm receiver, then you either buy or build a loop that is compatible with the receiver, or you go with the attic / outdoor antenna options.
 

ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
23,696
Location
Bowie, Md.
Viel Danken for that LF Engineering link, Groeteschele. I had heard about their H-900 but didn't know they had others. Time to add that to my list of links. Sadly a tower in my yard is quite out of the question (heh)

Mike
 

a29zuk

Member
Joined
Mar 6, 2005
Messages
770
Location
SE Michigan
If you have a communication receiver and a lot of room running about 400' of wire on the ground(it could also be elevated) makes a great BCB antenna. It's just long enough to receive signals off both the sides of the antenna and off of the ends, too!

I have done this in the past at a little used park near me with my Palstar R30 and it works great.

Jim
 

ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
23,696
Location
Bowie, Md.
If you are talking outdoor, you're going to be hard pressed to beat the K9AY or Kaz....Mike
 

ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
23,696
Location
Bowie, Md.
If you have a communication receiver and a lot of room running about 400' of wire on the ground(it could also be elevated) makes a great BCB antenna. It's just long enough to receive signals off both the sides of the antenna and off of the ends, too!

I have done this in the past at a little used park near me with my Palstar R30 and it works great.

Jim
Must take FOREVER to wrap that much wire - and God help you if it kinks....Mike
 

a29zuk

Member
Joined
Mar 6, 2005
Messages
770
Location
SE Michigan
Must take FOREVER to wrap that much wire - and God help you if it kinks....Mike
Not too bad. I bought one of them empty reel spools at Home Depot. It's like the ones that hold 100' extension cord and it has a hand crank on the side of it.
Later on I made a small linkage that fits in my battery drill motor and the other end fits into the side of the spool. Now I just use the drill motor to reel the (#22)wire in without any kinks!

Jim
 

ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
23,696
Location
Bowie, Md.
I totally forgot one class of gear that might have value - phasing units (notice I didn't say phasers - I don't want the ghosts of Gene and Majel Roddenberry bothering me, heh). I'm not all that familiar with them, but the theory is that you are able to take a signal from 2 antennas and place it either in phase or out of phase, thus either enhancing or nulling it out. Reportedly you can get even deeper nulls than you can with a loop.

I have a few models, with reviews where known, in the article I gave earlier. From what little I gather, the MFJ units need some surgery before they will work on MW, but once done, the results are reportedly impressive.

Mike
 

a29zuk

Member
Joined
Mar 6, 2005
Messages
770
Location
SE Michigan
I totally forgot one class of gear that might have value - phasing units (notice I didn't say phasers - I don't want the ghosts of Gene and Majel Roddenberry bothering me, heh). I'm not all that familiar with them, but the theory is that you are able to take a signal from 2 antennas and place it either in phase or out of phase, thus either enhancing or nulling it out. Reportedly you can get even deeper nulls than you can with a loop.

I have a few models, with reviews where known, in the article I gave earlier. From what little I gather, the MFJ units need some surgery before they will work on MW, but once done, the results are reportedly impressive.

Mike
Yes. I did the mod on my MFJ-1025. It works very well on my antennas at home but I usually use it for eliminating noise. Someday I will take it to the park with 2 400' antennas and give it a try.
For those of you that are interested here is the mod:
 

Attachments

a29zuk

Member
Joined
Mar 6, 2005
Messages
770
Location
SE Michigan
Not too bad. I bought one of them empty reel spools at Home Depot. It's like the ones that hold 100' extension cord and it has a hand crank on the side of it.
Later on I made a small linkage that fits in my battery drill motor and the other end fits into the side of the spool. Now I just use the drill motor to reel the (#22)wire in without any kinks!

Jim
And here is a post from a long time ago with a picture of the wire spool. This was before I made the linkage. You have to scroll down to post #88.

Jim
 

majoco

Member
Joined
Dec 25, 2008
Messages
3,791
Location
New Zealand
Big loops are best! I can take this outside and clamp the stem in a pushbike rack. One day I'll put the tuning cap into a box with switches. The intention was to get down to the low frequency beacons with all the turns of the loop and all the capacitance but it only got down to about 275kHz. At the moment I just use clip leads but it still works very well on the BC band through my Sony CRF 5090.

Loops.jpg3-gang cap.jpgDSC_0561 radmus.jpg
 

ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
23,696
Location
Bowie, Md.
Yes getting down this low, loops are the way to go - unless you have LOTS of land and very forgiving neighbors (heh)...Mike
 

WA8ZTZ

Member
Joined
Feb 23, 2014
Messages
806
I'm quite surprised by this, but Universal Radio is selling several NRC publications on the topic of antennas. Go to the very bottom of this page to see the selection


Mike
Between the several NRC antenna books enough reading there to keep you busy for weeks.
 
Status
Not open for further replies.
Top