Ive been messing around with different way’s to feed my a.m. signal to antennas that wont take a big pipe on the porch but would get my signal out of the house around the community.
Ive been messing around with different way’s to feed my a.m. signal to antennas that wont take a big pipe on the porch but would get my signal out of the house around the community.
One thought I had was feeding 100mW into a long piece of coax using the shield as the radiator and grounding the tx to earth ground.
What would I have to do with the end of the coax that is not connected to the tx? Should I put a couple 47 ohm resistors on the open end of the coax or just leave it open?
I was thinking i could run the coax behind the under-skirting of the mobile home i live in but would not have it laying on the ground.
Any ideas?
EDIT: I will be using the SSTRAN because of the hi-fi sound , i am irritated with talking house lack of bass response.
TH Freq Response
Some sub-models of the TH have odd input impedences for reasons that are probably parts-source based. I don’t think the TH people care too much about the line-in performance as they heavily promote the digital recorder.
I found that some models need a 1000/500/8 ohm matching transformer for best performance.
That might help.
Outdoor placement?
I have used the inexpensive styrofoam picnic ice chests as a handy outdoor enclosure for putting my transmitters outside to increase range. Easy to add access holes, etc, and if it’s cold where you are located the box stays nice and warm inside. I put a 110 v extensioon cord inside the ice chest and plug the wall wart into the extension cord inside the ice chest to provide additional heat as it IS cold in the winter where I am.
Coax Radiator
Rock,
If I follow this correctly, you want to attach the shield of a coax to the tx. output and leave the center conductor unattached. This will work exactly the same as if you had used a piece of wire since the shield will now be the radiator.
Neil
Neil
You are correct, i wanted see if it would have the same effect as leaky coax. Though now that i think about it more, it seems that your answer would be more on the money.
It would act like a piece of wire on the tx , the coax is 50 feet long and is too long for part 15 compliance. But i’m sure it would work just the same.
I was concerned with causing too much strain on the sstran and leaving one end of the coax opened to signal leakage. Then again, i wonder what the fcc considers leaky coaxial cable?
This would be along the same lines wouldn’t it?
I understand real leaky coax has different properties altogether.
Hey scwis
How well did your picnic cooler work?
Did you try this with a talking house?
If i could fix the sound mis-match on the TH 2 i have then i would try your idea with the Styrofoam cooler or perhaps a storage tub from Rubbermaid. Could add a piece of 1/2 inch pvp water pipe to the back of it to help support the wire antenna.
One elbow piece into the back of the tub, a short piece of pvc pipe and a 9 foot length of pvc pipe extended vertically. Would probably have to add something to the vertical pipe to support it.
Hmmm lol
On another note: The problem with the mis-match could be the cord i am using too, a cheap 1/8 inch stereo plug to rca phono. I might have to go to rad-shack and see what they have there. But in the end, i see a matching transformer in it’s future.
I noticed too that the channels below say about 1500 khz to 540 seem to be the cleanest sounding but still lacking in bass response.
Of course the lower down the band I go the less range I have and more noise.