San Bernardino County: West Valley Search & Rescue 155.160

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AM909

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On the San Bernardino County page, at "Countywide Search and Rescue", the "West End Repeater" and "Portable Repeater 1" both show an input of 155.775, but I'm wondering if this is a typo of 150.775. The license WPQD622 (to an independent entity, West Valley Search & Rescue, Inc.) shows three 155 MHz channels, including 155.160, in fixed base and temp base locations. Temp repeaters are licensed only on the 155.160 frequency. Mobiles are licensed for all three 155 MHz channels and 150.775. No other station classes are licensed for 150.775. 155.775 is not on the license at all.

However, as you can see, 155.775 is licensed to San Bernardino County as base and repeater at a few high-level sites, which would likely clobber lower-power mobiles trying to talk through the S&R repeaters in much of the county.

It also strikes me as unusual that a temp repeater would intentionally use such a narrow split (requiring a pretty big duplexer) when they had licensed a nice 4.385 MHz split that could work with a "flat-pack" or two antennas (plus maybe a single pass or notch cavity, depending ...) IIRC.

So, is anyone familiar with this system? Is the input supposed to be 150.775?
 

f40ph

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Ham repeaters have used .600 separation for years as wideband. I don't think 155.160 / 155.775 using narrowband seems too terrible. However, I don't believe that particular pair is actually in use in the "West End". Most everything seems to be in service using 155.775 output and 153.905 input.
Based on that FCC license, I'm inclined to believe that the input is 150.775 as well.
 

AM909

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Just to clarify, I understand 600 kHz is possible – I've built and maintained 2m repeaters. I'm just saying that the 4- to 6-cavity VHF duplexers usually necessary are large and heavy, especially in comparison to the smallish radios that might be used for a portable repeater. It seems it becomes far more luggable as a single package when you can downsize the filtering to use the wide spread available in public-safety highband (and apparently intended in this case, as you noted).
 
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