New antennas on CHP.

KK6ZTE

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You may have noticed CHP ditched the Laird antennas for the ones in the pic above.

Paul
You're referring to the low band "wideband" Laird antenna? I noticed that as well, but haven't been able to identify the replacement.
 

steinberg

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You're referring to the low band "wideband" Laird antenna? I noticed that as well, but haven't been able to identify the replacement.
New one is a Panorama AVLWB 39-46. For some reason Panorama Doesn't have it listed on their website, but it is listed in a few price sheets floating about.
 

Anderegg

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39-46MHz...lol...seems like it was specifically designed for CHP!

Paul
 

shinkley

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Sorry I couldn't find a thread on the 700 MHZ extenders, so will chime in on this one.

Has anyone heard 700 MHZ extender traffic in Orange County CA??
 

AM909

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I'm in Garden Grove next to the 22 fwy. It's rare but yes I have heard them. I think they maybe very low power.
By way of comparison, the current mobile license (KA4993) has the VHF extenders at 0.3W. I imagine they are spec'd to have a very short range – maybe tens of feet – since the whole division is still on the same channel.

Does anyone know if they did something interesting with the extender logic to handle multiple units at one scene, since the whole division is still on just one channel?
 

mmckenna

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By way of comparison, the current mobile license (KA4993) has the VHF extenders at 0.3W. I imagine they are spec'd to have a very short range – maybe tens of feet – since the whole division is still on the same channel.

Does anyone know if they did something interesting with the extender logic to handle multiple units at one scene, since the whole division is still on just one channel?
The extenders going back quite a ways had a method to determine when other active extenders were in range and would negotiate one to take over as primary and the others would go into standby.
 

020768

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Sorry I couldn't find a thread on the 700 MHZ extenders, so will chime in on this one.

Has anyone heard 700 MHZ extender traffic in Orange County CA??
I'm in Garden Grove next to the 22 fwy. It's rare but yes I have heard them. I think they maybe very low power.
You won't hear much. 90% of the time these channels only need to reach the repeater in the patrol car. There's a few 700MHz channels meant for extender to extender but most people don't use these and some are encrypted.

By way of comparison, the current mobile license (KA4993) has the VHF extenders at 0.3W. I imagine they are spec'd to have a very short range – maybe tens of feet – since the whole division is still on the same channel.

Does anyone know if they did something interesting with the extender logic to handle multiple units at one scene, since the whole division is still on just one channel?
I just checked to make sure and Garden Grove is in the Westminster CHP area and they dont share a channel with the adjoining areas. Maybe I'm misunderstanding though.

The extenders going back quite a ways had a method to determine when other active extenders were in range and would negotiate one to take over as primary and the others would go into standby.
Still the case. The cars are supposed to figure it out. When multiple cars are in the same area with active repeaters one car becomes the primary while the others should go into standby.
 

Anderegg

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The cars figuring it out thing is hit and miss. It seems that when there is a pursuit involving multiple CHP area offices, I tend to hea rthem get multiple extenders on and dispatch not being able to hear units. These would be the type of incidents where officers are busy pointing guns and can't get back ot the cars to mess around with extender settings.

On the freeway, expect about maybe 1/4 tops for 700 extender RX, which is about what I get when aproaching crash scenes. Line of sight say on an elevated bridge, your talking like 5+ miles easy.

Paul
 

Randyk4661

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I just checked to make sure and Garden Grove is in the Westminster CHP area and they dont share a channel with the adjoining areas. Maybe I'm misunderstanding though.

That is correct, Westminster, Santa Ana, and San Juan Cap. all have different extender channels. I would guess the same for Santa Fe Springs, different channels. Since I live in the eastern part of the Westminster area of the 22 Fwy, I also have Santa Ana extenders programmed. Again it is rare that I hear them. I would think the problem lies with a half dozen or more radios receiving what the one guy is transmitting and hearing all the other radios repeating it. A massive echo effect.
 

Anderegg

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The extender channels are matched to the color channels...Orange 1 for San Diego happens to share the extender channel for Blue 1. The CHP handhelds also have one zone of 16 channels with all 16 extender channels to manually select them...each extender frequency has a fixed NAC asigned. Also, the officers can manually override the extender selected in the car to an alternate or any of the other 16 VRS channels if they really need to for whatever reason. (per a CHP officer)

Paul
 
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