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Comparing VHF/GPS Radios (w/ current rebates)
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DW



Joined: 07 Sep 2017
Posts: 43
City/Region: Mount Vernon
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: Wicked Pissah
PostPosted: Thu Aug 30, 2018 2:05 pm    Post subject: Reply with quote

One note on crossing the Canadian border, as I have hundreds of times; get a NEXUS pass. Pay the $50 bucks or whatever it is now, fill out the application on line, go to the interview, and enjoy crossing with no hassle. You don’t even have to land to clear by boat. And if you cross by car, you wonder why you didn’t do this a long time ago. Enjoy.

https://www.cbp.gov/travel/trusted-traveler-programs/nexus
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journey on



Joined: 03 Mar 2005
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City/Region: Valley Centre
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Vessel Name: journey on
Photos: Journey On
PostPosted: Fri Aug 31, 2018 12:09 am    Post subject: Reply with quote

A word of caution. If you use 2 radios with one antenna and an antenna splitter, you'll have 1/2 the power at each radio input, a 3 dB loss. The solution is, of course, to use 2 antennas, each feeding a separate radio. This is only for the receive. I believe the transmission goes straight out.

Also, if the radio has both VHF and AIS with a single antenna input, some of the antenna power must be diverted from the VHF side to the AIS receiver. I have separate VHF and AIS units and antennas.

The problem with 2 radios and separate antennas is the power put into the receiving radio from the transmitting radio, even if they're on separate channels. So if you transmit, turn the other radio down.

And last, is that all decent VHF radios have the same receive performance: 20 dB of Quieting (sensitivity) @ 0.35 micro volts input and 12 dB SINAD @ 0.25 microvolts. This is the same for both ICOM and SH, cheap or top of the line. So, as long as you buy a "good" brand, you'll get decent performance. The only difference is the bells and whistles they add.

Boris
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