Rangemaster & SSTRAN help in the greater denver area

Yeah?? How much to tell me how put a Rangemaster on the roof?

as always i will still offer advice by phone or internet for free. the fee comes in in i have to do all the work (manual labor) and visit a site, etc.

I was kinda being sarcastic Rev, about the grounding of a rooftop transmitter dilemma...

But on another matter, you mention your from Colorado, - is Arvada close to Denver?... A news story caught my eye about some crazy radio signal that knocked out 40 garage doors in the area, and they've been unable to determine where it's coming from!.. I couldn't resist the thought that some Part15 experimenter was somehow behind it! -- Of course I jest, but still it's a fascinating story.. http://www.9news.com/news/article/235971/222/Mysterious-signal-knocks-out-power-to-40-garage-doors- What could be the origin of that radio signal?

The garage frequency story was neat. But we'll probably never know how it ends.

Darn.

it's buckley afb. they have a radar system that uses the same frequencies as garage door openers. there was a news blurb somewhere about military radio systems knocking out garage door openers and this has happened in florida as well.

buckley is in sw aurora colorado 20mi from arvada. arvada is opposite side of denver metro from buckley. their radar can run multiple kW's.

fcc is in lakewood at alameda and s wadsworth about 8 mile from arvada. was wondering why their log periodic yagi was pointed toward arvada. it regularly is,but sometimes is pointed toward denver. i look on their roof whenever i pass there. they have 2 discones, hf log periodic, couple vhf/uhf/fm fringe tv antenna's, some collinear two way antenna's.

76 and quaker is a few miles northwest of moms house. i don't live there anymore although my stuff is still stored there. 1/2 mi radius around 76/quaker not buckley. all garage doors are made by same company.

As for the Rangemaster on the roof question, there is only one answer. Isotron. That will be $1, please. Tax included.

Tommy J

"on the roof question, there is only one answer. Isotron.:

Ya I pointed that out too several times, only to be met with "well that is only meant for 50 ohms...gotta modify this and that blah blah".

I can say this...setting up an Isotron is far easier, less time consuming and works right the first time every time over the 3 meter vertical rod/loading coil/peaking n tweaking variety.

And as pointed out many times before, does not require a ground radial system and is perfect for rooftop installations.

RFB

Maybe you might want to do some consulting for these folks who have the elaborate Christmas light displays using FM transmitters to send the audio part to the audience via their car radios. A lot of them seem to be having identical and repetitive problems and apparently cannot grasp tips and suggested fixes for free..but maybe they will grasp them while cutting you a check.

RFB

talk to ultainium about isotrons and E/H antenna's he was doing some experimenting years ago with them. bet he is a treasure trove of info on these antenna's. my experience is with traditional antenna design although if i could figure out how to build a isotron from scratch i may give it a shot and see what it does with my sstran.

Here is your home brew Isotron.

http://www.pcs-electronics.com/phpBB2/viewtopic.php?t=1092

My fee is $50, but I paid myself, so your balance is $0

I had browsed around concerning the isotrons previously, and from my understanding they don't require radials but they still require a proper ground.. thus breaking the 3 meter rule - somewhere I read that tuning them can be a big task and that they very much depend on their coaxial feed - and they are very temperamental if you even put your hand near that coaxial it will reak havoc on the tuned system..

Now, I'm completely ignorant about it all really.. I only have a vaque understanding of them.. BUT, it seems clear enough to me that they operate in conjunction with a long radiating ground - Is this not correct? -- so I'm kind of lost on how an isotron would be a solution.

It would also void the certification of the transmitter..

And lastly.. I can't find a cost for them without inquiry to the company -- which pretty much tells me they cost a bundle!

that is my understanding as well that they act like a top loaded (L/C network) antenna in conjunction with a long ground lead. the coils is the resistance and the plates are capacitance and require the long ground lead to properly tune up and the isotron is simply an E/H in a different configuration.