Posted: 1/26/2013 11:12:45 AM EDT
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I've read through here and I've googled, but I can't find the answers (or maybe I just don't understand them, yet) to the following:
Anyway, I'm looking at mobile transceivers, and HT et al., and I have some questions: 1. Simplex communication on the 2 meter band, everything else being equal, is there any practical difference in Tx distances between a 1 watt HT and a 5 watt HT? 2. When comparing the Rx abilities of two radios, what does exactly sensitivity mean in relation to reception? 3. What's better sensitivity 1.5 micro volts, or 3 micro volts? I apologize, if this has been asked and answered somewhere, but I've been driving myself nuts between looking at specs and trying to make comparisons and trying to figure things out. |
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The difference between 1 watt and 5 watts is significant. However, the difference between 3 watts and 5 watts is practically nothing.
Sensitivity is how well the reciever hears a signal. To answer the third question, the lower the microvolt rating, the more sensitive the reciever is. There is more to consider than just reciever sensitivity. |
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Spec sheets for receivers usually have something like the following:
Receiver sensitivity: 0.25μV at 12dB SINAD which is stating that the receiver will produce intelligible speech with a signal at its input as low as 0.25μV. SINAD A receiver sensitivity of 1.5μV at 12dB SINAD strikes me as fairly deaf at VHF/UHF. Half the voltage is one quarter the power, so the 1.5μV receiver requires one quarter the signal the 3.0μV receiver does. |
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Quoted:
Thank you for all of the input. I ended up getting a VX-6R today. Now with the cart firmly in front of the horse, it's time to get my license.  That is exactly what I did and it not a problem. Give you time to listen and learn before jumping in. It will also encourage you to get busy and get licensed! Now I seem to be sending Derek45 $$$ every few weeks for some more Ham goodness he is disposing of! |