I live in the east bay and I get all of golden gate division base channels and some of the mobile's. Some days are better than others but pretty good reception when I put HP1 on the upstairs window sill with stock antenna. In the suv I use a radio shack mag mount and I can receive up to Napa, Santa Rosa and south to San Jose and Monterey when sitting in the driveway, and I don't live on a hill. Reception fluctuates depending on weather and location. Hope this helps.
I'm sure it works for you, but, personally, I've never liked Radio Shack antennas. Best antenna I've ever had was the Antenna Specialists Mon-31 (I think that'd the model number, might be Mon-38?), but since that hasn't been made for a very long, time, the only antenna I think I would try would be the Austin Spectra. Most other scanner antennas don't cover below 100 MHz. CHP, for whatever reason still uses 42 MHz after all these decades. Los Angeles City Fire USED TO use 33 MHz, but has been at 800 MHz for at least 20 years, now... LA County Sheriff used to be on 39 MHz, but they made the change to 480 MHz... only CHP still hangs on to "the past" like that. I'd much rather they used UHF repeaters like much of the rest of the country, but... oh well... Anyway, thank you for your info.
tHE Mon 31 Antenna Specialists was the best mobil antenna. It's too bad you cannot get these anymore.
The Mon-31 was a base antenna. There likely was a mobile version, but it would have had a different product number. Yes, it was the best antenna ever. Small and low profile, but if you had it up high enough, you could hear everything.