开云体育

I am not familiar with the product you mention.? Evaluate what is used to clamp the voltage?? Is the device UL1449 Edition 3 or 4 listed?? What is the let through voltage?? An on line search did

I like RFI-EMI-GUY's recommendation of setting up a pair of receivers fed into a voter -- although building a CP antenna and setting up a receive voter is _two_ projects in one... From what I've seen,

I heard, quite a few decades ago, that some who worked at Jampro (broadcast Fm antenna manufacturer) in California, had a scaled back model of one of the FM CP antennas for CP, on 220 MHz. I've always

I made a CP (helix) antenna for analog 800MHz cellular.? This was in the early 1990s, when the part 22 cell rules required TX to be vertically polarized so I didn't mess with the TX antenna. I did

Neil you're not the only one! I've tried getting some information from the manufacturers on CPs and got almost nothing. I do know however that a North Texas group took a DB420 and rotated the dipole

ive actually built and tested cp antennas for fm broadcast with great results when stacked. i completely agree why no one will build a 2 meter or 440 version. that being said....im either going to

I've always wanted to get a circular polarized antenna to try satellite work. Long ago back in the 70s, a friend who built a two meter repeater and I did a lot of experimenting I was his weak signal

As a Broadcaster, I have asked many of the Commercial? Antenna? manufacturers? If? their Engineers? could develop a prototype antenna for me.? ZERO takers.?? what I am looking for is a

Circular polarization eliminates a lot of mobile flutter due to reflections. Radio broadcast industry normally uses right hand circular polarization on FM and left hand circular polarization on the HD

I believe there was some research using both horizontal and vertical polarity with pagers back in pager days. I think it was Bogner that made the antennas for 900 Mhz. Pagers are seldom vertical or

If you are considering CP for a repeater station I would suggest diversity reception using as a second antenna a horizontal loop. Use two identical receivers and a voting comparitor. -- The Real

I've gone down this rabbit hole as well. There's some ancient documentation out there showcasing some experiment where a linear and circular antenna at a repeater site were choosable by the users (via

Howdy, I went down a little bit of a rabbit hole reading about the use of circular polarity in antennas. I'm curious if anyone's experimented with it for repeaters or traditional two-way stuff. Of

And then there's this one. Either I forgot or missed the documentation on RB. It's close to the SS-32SMP but not the same. I've got an email in for Randy.? It's been way long since I've been messing

Group: I’m looking for the correct software to program a MIII “racing stripe” model of GE radio. I have programmed the older version (no stripes) in the past with these DOS programs: Mastr III

The closest I have is revision 'C'

That might be a UHF version of a GE AVR simplex repeater that connects to a regular mobile radio.

Hi guys, When working on a PDP-11 (Q-Bus) system, actually an ISI Unix system? at a large printing house in the 1980s, motor generator systems powered the "precious" computer systems, three phase

I am working on a Astro Spectra Consolette that has the TRN7391B audio board in it, does anyone have a schematic or documentation for it?

Thanks. -- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at http://www.srgclub.org for the current email address.