The radio I'm using in the mobile is a GE Orion with a noise blanker. However, a noise blanker is designed to help with impulse-type noise. Microprocessor hash and similar noise sources are continuous, so I doubt a blanker is very effective. The problem, in my mind, is the huge increase in this type of noise compared to 20 or 30 years ago.
Chuck WB2EDV ----- Original Message ----- From: Oz-in-DFW To: [email protected] Sent: Monday, August 30, 2010 5:00 PM Subject: Re: [Repeater-Builder] DB212-3 On 8/30/2010 2:08 PM, Chuck Kelsey wrote: Doug, what were the State Police using for mobile radios back when you were involved? I'm finding that the newer, wider front end, radios don't hear as well as the old 0.5-1 MHz wide receivers did. I can hit my 6-meter repeater full quieting, yet sometimes can hardly hear it due to mobile environment noise that you can't avoid driving past (computers, LAN equipment, etc., etc.) Chuck WB2EDV I'll bet 99-44/100% of this is the lack of an effective noise blanker. I was running a LB SyntorX 9000 at the peak of the last cycle and it ran rings around everything else. It ran FULL band 10 and 6. Bench sensitivity of all the radios were pretty close, but the moto mobile noise blankers were a major (>> 10 dB) advantage. I'll bet those 'old' radios have good noise blankers. -- mailto:[email protected] Oz POB 93167 Southlake, TX 76092 (Near DFW Airport)
