G’day
For those topbanders, who have medium wave stations nearby and are thinking
about trying a DDC/DUC SDR, you may find the comments below from Phil
VK6APH/VK6PH (in answer to a query on the Apache Labs reflector a few years
ago) of interest.
Phil lives line of sight from the Australian
On Sun,10/18/2015 8:59 PM, Steve Ireland wrote:
Phil lives line of sight from the Australian Broadcasting Transmitter
installation in the northern suburbs of Perth. There are three AM transmitters
there which run 24 hours a day, seven days a week:
6PB at 10 kW on 585 kHz; 6RN at 20 kW on 810
A NEC4.2 model of a tee using a 60-ft tall vertical conductor shows 29 -j
0.04 ohms at 1.9 MHz when connected at the top to the center of a horizontal
conductor 89 feet in length.
The tee was base-driven against 16 x 33-foot radials buried 4 inches in 5
mS/m, d.c. 13 earth. Conductor ODs are
Hi Peter, I have built many 160 T’s and they always come out best with the
vertical height + the horizontal top equaling around 135 – 140 ft for 1820. I
know you mentioned 1900 but you can scale that from these numbers. I have
several with 90 ft vertical and 45 top wire and friends with 70
Thanks to everyone for all the Q's and patience digging my QRP signal out. I
made 103 contacts with many 6 & 9 point contacts and four 12 and 15 point
contacts. Those were a real challenge. Overall band conditions were great with
low QRN and local noise. I had a blast ! -73 Joe N3A/N3HEE
Advise please on the formula to calculate the lengths of the horizontal
elements for a 160m Tee antenna. Currently I have a 60 foot vertical wire
suspended between the trees, with a long horizontal section making an
inverted L, but want to change it to a Tee. I am looking to resonate the
antenna
Luis, IV3PRK/HC1PF has been instrumental in BOG antenna research. He has
brought together information from some of the top BOG antenna
users/researchers, and an antenna plotting expert. He has constructed BOG
antennas that helped over come noise at HC1PF his 2nd QTH near the equator.
I used the "tantenna.exe" calculator program which I downloaded from this
page and found the dimensions it calculated for my 160M T to be very close
to reality over my soil and about 32 random radials.
The program was written by the late Reg Edwards, G4FGQ.
Luis's BOG page is very informative.
Last night's contest was the first time I have used directional receiving
antennas (in this case BOGs) during a contest on TB.
Art NK8X
ᐧ
On Sun, Oct 18, 2015 at 11:47 AM, K1FZ-Bruce wrote:
>
> Luis, IV3PRK/HC1PF has been