Good thought on the IF. I just checked it out - the IF is at 455kHz but the switcher I'm using operates at 1.1MHz so I should be ok there. I guess I might have problems with the 36th harmonic of the 1.1MHz switcher coming in at around 36.3MHz. I bet the switcher drifts a lot too so it might be hard to pin down. I might borrow a suitable handheld receiver and scan around the band as Richard suggested. Cheers, Zik On 9/5/06, David VanHorn wrote: > > Telemetry downlinks shouldn't have any interference, unless it's by > conducted noise on the power supply lines. > > 36 MHz puts you a bit closer to the switcher than you'd be here in the US at > 72 MHz, but still plenty of things you can do. You want to avoid the > switcher operating around the receiver's IF frequency, and if the IF is 455 > kHz, that could be pretty interesting. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist