Years ago when I competed in the pylon wars at the Nats and at the NMPRA Championship (National Minature Pylon Racing Association) the transmitter check by oscilloscope was one of the first items that was looked at in our extensive safety checklist before you could compete. These 5 lb. birds at 180 mph were and are dangerous and the "powers that be" wanted to make sure you had a good radio link. Over the years several radio notables (such as Aberle, Waters and Orr) if I remember right served yeoman's duty checking the competitor's transmitters. I often stayed around until it traffic got light and asked the radio person what I was looking at on the 'scope and they would explain what you wanted and didn't want to see on the screen. The clean 3/4 watt signal (all the FCC allows) and potentiometer linearity I witnessed by the JR users going through the transmitter check was enough to convert me in 1983 and I've flown JR ever since. Nope.....I'm not sponsored by JR.....just love their radio!
As to splatter there were definitely some transmitters that were not "spot on frequency" and there used to be radio techs that tuned the receivers to the crystals you had as some crystals would be at the high or low end of the frequency band and somehow the tech could tune the receiver to more closely match the crystal in an effort to improve the range / radio link. I'm referring to radios used prior to my switch to JR. BCNU Bruce Hobbs -----Original Message----- From: John Erickson [mailto:[EMAIL PROTECTED] Sent: Monday, May 23, 2005 1:31 PM To: Tom Kallevang; John Derstine; [EMAIL PROTECTED]; Soaring List Subject: [RCSE] "Splatter" This idea of a "clean" transmitter is an interesting problem. I know this list has a lot of radio professionals. Can a transmitter "leak" the signal? I know I've experienced this in some big hand launch contests when you have 12 radios on at the same time. I've had hits when I know no one is one my channel. If it's true, shouldn't a transmitter frequency check be required at the start of any large contest? JE -- Erickson Architects John R. Erickson, AIA > From: Tom Kallevang <[EMAIL PROTECTED]> > Date: Mon, 23 May 2005 10:43:21 -0700 (PDT) > To: John Derstine <[EMAIL PROTECTED]>, [EMAIL PROTECTED], [email protected] > Subject: REply: [RCSE] Had a chance to try the Freq Checker this weekend > > This would be a huge > loss to the the R/C community, as you can actually eyeball if a Tx is > clean or not without a scope and an advanced degree. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
