I would imagine the Spectra's you were having problems with were low band, since all the ones I installed on both VHF and UHF never had any of those problems. All our antenna's were installed on the trunk lids, front fender (disguise ant) and some on the roof. Sirens yes had problem, especially early Federal Signal ones like the PA-15 an some early production (1970's manufactured) PA-20's, and mostly in Fire Trucks since they don't replace them as often as PD.
The US Army did RF field studies in the 40's and 50's, looking at what frequencies the human body and it's water content resonated with. Surprise!! The 170-180mhz band had the most reaction, and believe me you didn't want to watch those films as they cooked dogs and cats with antenna's located about 2 feet from their heads.
All electronic devices emits RF energy including incandecent, flourescent light bulbs, CRT TV tubes, your wireless routers, cell phones. I could go on and on, if this woman wants to live in an RF free enviroment, then she should move about 10 miles to NJ into the RF energy free zone near the old Playboy club in Vernon.
No, those were T83 high band Spectras. I've never seen a low band Spectra, although I think there were mid-band ones made for the international market. This issue was a problem on the A9 head, especially with a DEK box. We didn't know it at the time, but the RF would get back into the control head through the mic cord and mess with the data bus that changed states. Under the right conditions, the officer would key the radio and the siren DEK would randomly select an active state, like yelp. We messed with bypass caps, but ultimately "fixed" things with a ferrite core snapped onto the bottom of the mic cord. I'm not sure if the product group ran with the idea or did something else for suppression.
Many years ago I had a deputy police chief who had a disguised radio in his police package Chevrolet Caprice (as if you couldn't tell it was a cop car - even with the STICO antenna in the cowl). He complained about how keying his mic screwed up the "local stereo station." Problem solved (and many thanks received from the troops) by turning the output down to about 2 Watts.
Funny how decades of known legacy use are attacked by relative newcomers. The Armstrong Tower in Alpine's a great example. The other irony is that most of these people couldn't live if they weren't "plugged in" to the Internet and their cellphone, but it's not magic. It's all got to come from somewhere. When I was working in the midwest putting up tornado sirens, we were placing one in a schoolyard. After it was framed out on the pole waiting for the crew to put it up, one nutty woman told her kids to jump up and down on the speaker array, putting big cracks into the carbon composite material and ruining it. She came out the day we noticed the damage and was up in arms about how we were going to radiate her children. She thought it was a cellular antenna. It was a Whelen WPS2800 siren. I wanted to move it to an area that actually wanted one of those (it took me years to justify putting one in my own neighborhood... and then I vested out and moved). Looking at my former employer (a county, similar to Orange), it would have been ridiculous for them to claim the authority to enforce electromagnetic energy levels, either actively or through ordinance. It would have been like the guy driving up and down the subdivisions to see who hasn't mowed their lawn to the right height.
Since you mentioned it, here's an interesting story about the Teleport at Vernon Valley (look under SIGINT):
Section 3 - ADVERSARY FOREIGN INTELLIGENCE OPERATIONS - Operations Security - INTELLIGENCE THREAT HANDBOOK</h3></td> Keep your eyes open for Vlad and Dimitri's Plumbing vans.
I've never been there specifically, but have been to Traction Park, not too far away.
