SteveShannon

Maybe, but if you’re willing to incur $20,000 in legal fees and loss of that nice 1911 (and possibly prison time) to defend yourself after brandishing a firearm (or worse, shoot someone) to protect a $100 radio you’re not thinking very well. Plus, you’ve now broadcast in a public forum that you’re willing to use a firearm with less than self defense as the reason.

The OP is looking for a way to secure his radio when his vehicle is parked, not hang around and guard it.

The world is better because of you.

A gain of 11.9 db is more than twice the gain of 8.5 db when measured in the direction of the gain. So even though 10 less watts enters the antenna, in the direction of the gain twice as much RF power is focused. However, if you need an antenna that is less focused, more wide in its propagation pattern, a lower gain antenna might help. I’m curious what kind of coax you used when you measured the two different antennas. Honestly I would try both antennas to see which one works better. The calculations give an indication but real world usage is better.

Not necessarily. But in the bottom portion of your post the higher gain antenna obviously has 70 or 80% more EIRP, so I’m curious why you mention 10-13 higher watts from the lower gain antenna?

Is it because of the lower SWR that you assume the lower gain antenna would be better? That little difference in SWR isn’t as likely to make a difference as the gain, assuming the gain is the right direction.

Under the current interpretation of fcc rules it would be difficult to accomplish. Welcome!

A person could always put in a redundant fuel pump: https://aeromotiveinc.com/products/phantom-dual-340?srsltid=AfmBOor_5fPdAREqudFOxZ3UClS5hRN0wx6qRlsMga1EIxl3QkZP9ns2

No, we don’t say you’re lying about that; we tell you you’re a jerk when you imply that anyone who doesn’t get 200 miles is incompetent and when you scold new members about not reading the rules. As you say: it’s all about line of sight.

Welcome to new member @qxovrix!

As you have acknowledged data transmissions over a repeater are prohibited, but a very short burst of data would probably never be noticed. However, given the limited bandwidth of FM over a repeater very little data could be transmitted. Also, there are only a few radios that send data anyway.

Because the regulations prohibit certifying a GMRS radio that can easily transmit on ham frequencies.

Exactly! When the base of the antenna is getting warm, it’s being heated mechanically (thermal conduction) by the RF output transistor which must be much warmer. I would be more concerned about that than the antenna. Twice the power requires four times as much current. There’s very seldom any range advantage to merely doubling power for UHF.

There are no USA made GMRS certified radios. There are commercial radios, certified part 90, and ham radios, which don’t require certification beyond part 15, made in countries more friendly to the U.S.A. which can be programmed to transmit and receive on GMRS frequencies. Garmin GMRS radios are made in Taiwan. They are probably the most expensive GMRS certified radios available.

Are you asking about the frequency of interference (RF) or the frequency of the light produced (which must include multiple wavelengths in order to be white)?

I assume that’s a typo?

They need a banana for scale?

Well, that’s one of his problems.

A friend of mine did some testing, including using an external microphone so he could measure the effect of the tiger tail unaffected by coupling with his body. He actually felt that his radio worked better without the wire. I have never tried it.

Don’t feel like you need to go away. We like to argue minutiae.

No need to feel sorry. The guy that jumped you about it is a grade A dick. Fortunately the forum software gives us the ability to filter out his posts.

Ask the owner, look in the database or on the map here, scan the tone of someone’s input transmission, or assume it’s the same as the output tone and scan that.

Ress?

Probably you have the wrong tone or frequency. 1. Are you listening to a repeater? Then you need to transmit on a repeater input frequency which is 5 MHz higher than the output frequency. 2. If you have the frequency correct and they still don’t hear you then you probably have the input tone incorrect.

That’s true; the antenna still must be able to radiate at the correct frequency.