[600MRG] MF Vertical Wire Loop

[Dave Riley]

*This transmitting loop has been up in the air here for about eight 
years or so...*

*1. The loop consists of ONE piece or wire and ONE variable capacitor, 
that's it...
**The high voltage wire is el-cheapo on e-bay search;
"Professional Electric Underground Dog Fence Wire 14 16 18 gauge 
500/1000/1500"
Is very high voltage insulated wire and has 9 strands of copper in the 
various sizes...*

*2. This loop tunes from well below 15khz. ( SAQ ) on up to HF... You 
will need a decade box or other capacitor in parallel with the variable 
cap in order to tune _way down_ below to VLF...
*

*Here is simplified pix with plenty of space to make notes:
http://www.radiocom.net/600M/Loop2017a.jpg*

*Determine parameters of loop from this web page:
Tells you everything you want to know...
http://www.66pacific.com/calculators/small-transmitting-loop-antenna-calculator.aspx*

*It's too easy, requires no radials, coax, relays, etc...
Installs in one hour with poly-rope..*

*The variometer here has 6 turns of HV wire wound over the cold end in 
order to couple the TX RFPA final with NO HV DC on the variometer ( 
safety )..
At the top of the vario is a great spot for an e-probe for 'very fast' 
QSK with no relays...
If you don't care about the receive 'pre-select' effect then go wide 
band by placing the e-probe placed near the wire of the loop itself...
*

*The bananna jacks at the bottom allow you to insert a toroid 
transformer if you like...*

*I will add some 'extras' but first try a loop and see more quiet RX and 
higher efficiency RR above poor ground which is most everywhere )...*

*TNX from DaveR AA1A*