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Ultra short QRP and Digital HF Dipoles

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Ultra short QRP and Digital HF Dipoles

Post by M6MRP on Thu Jul 19, 2012 10:49 pm

Anybody needing a realy small/short qrp or digital HF dipole have a look at this link, I have built the 30m version which worked well indoors on digital modes and I am now rebuilding it for the 20m band with the coils on FG to take a bit more heat.
Sorry not a link as the system wont let me as I am a new member of less than 7 days? so google
w w w . nonstopsystems.com/radio/frank_radio_antenna_KGD.htm#KGD-20-FD
73
Phil
M6MRP
26WF183

Daxi edited to add the following [Only admins are allowed to see this link]

M6MRP
New Member
New Member

Call Sign : M6MRP
Other Call Signs : 26WF183
HF Rig : FT840
HF Antenna : HF Loop
VHF / UHF Rig : FT817ND
VHF / UHF Antenna : 4 ele Beam
HandHeld : FT51R
Preferred Bands : 40m, 15m, (11m), 10m and 2m
Location : Northumberland UK
Registration date : 2012-07-12
Number of posts : 21
Points : 31
Reputation : 0

http://www.qrz.com/db/M6MRP

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Re: Ultra short QRP and Digital HF Dipoles

Post by daxi on Fri Jul 20, 2012 5:52 pm

I use a MFJ mini loop tuner (MFJ 933) This works on 20 meters with a loop of just 13 feet for 20 meters & even with the loop laying horizontal I have had fair results with QRP. With a vertical loop the results are good for what it is.

Edited to add. Southgate has an excellent small loop antenna that is very cheap to make & fair in performance & which will work blue tacked to an indoor wall.
[Only admins are allowed to see this link]


Last edited by daxi on Fri Jul 20, 2012 9:16 pm; edited 1 time in total

_________________
You Can Get Further With A Kind Word and a Linear - than you can with just a kind word.
Old radio nuts never die, they just fade into the noise.
Best 73's means Best best wishes's.
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daxi
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Call Sign : M0LSX
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Re: Ultra short QRP and Digital HF Dipoles

Post by M6MRP on Fri Jul 20, 2012 8:13 pm

Hi Daxi, yes the loop I made realy suprised me to say the least, it was made from a selection of plans off the internet and the loop itself was quite large made out of the heavy lashing kit multistranded binding cable running through a from what I remember a small and tidy type 61 toroid at the top for the TX ring and a very large and long plate variable capacitor out of a box of junk that eneded up here after a semi local operator went silent key, the whole thing was mounted on a huge wooden cross but every time it was mooved it had to be retuned so it never ended up outside up on the wall brackets, the thought of having to go up and down the ladders every time was frightning and the remote tuner (electric screwdriver) plans were a bit to much for me. I was very supprised how good it did work like yours flat against a wall, Eastern European stations and Russia etc were strong and clear, the KGD dipole is not as strong on RX indoors but will be an easier option to mount outside.
PS, on your post it says only admin are allowed to see this link.
regards
Phil

M6MRP
New Member
New Member

Call Sign : M6MRP
Other Call Signs : 26WF183
HF Rig : FT840
HF Antenna : HF Loop
VHF / UHF Rig : FT817ND
VHF / UHF Antenna : 4 ele Beam
HandHeld : FT51R
Preferred Bands : 40m, 15m, (11m), 10m and 2m
Location : Northumberland UK
Registration date : 2012-07-12
Number of posts : 21
Points : 31
Reputation : 0

http://www.qrz.com/db/M6MRP

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Re: Ultra short QRP and Digital HF Dipoles

Post by daxi on Fri Jul 20, 2012 11:42 pm

Was it this link??
[Only admins are allowed to see this link]

_________________
You Can Get Further With A Kind Word and a Linear - than you can with just a kind word.
Old radio nuts never die, they just fade into the noise.
Best 73's means Best best wishes's.
avatar
daxi
Admin
Admin

Call Sign : M0LSX
Special Event Calls : Various.
Location : Norwich
Registration date : 2007-10-30
Number of posts : 764
Points : 839
Reputation : 42

http://www.qrz.com/M0LSX

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Re: Ultra short QRP and Digital HF Dipoles

Post by M6MRP on Sat Jul 21, 2012 4:59 am

Yep thats the one Daxi and it says the same, (only admins are alowed to see this link)?
Just spent over an hour reading about broadband HF antennas from the link on your post, that was way to indepth for a Friday afternoon lol, good stuff though nice find.
Phil

M6MRP
New Member
New Member

Call Sign : M6MRP
Other Call Signs : 26WF183
HF Rig : FT840
HF Antenna : HF Loop
VHF / UHF Rig : FT817ND
VHF / UHF Antenna : 4 ele Beam
HandHeld : FT51R
Preferred Bands : 40m, 15m, (11m), 10m and 2m
Location : Northumberland UK
Registration date : 2012-07-12
Number of posts : 21
Points : 31
Reputation : 0

http://www.qrz.com/db/M6MRP

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Re: Ultra short QRP and Digital HF Dipoles

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