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Old 11-17-2005, 02:16 PM
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JohnBuckner
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Default RE: RX problems; Newbie needs help

I,ve no idea what your parkflyer electronics are but generally if you are going to mix brands of Tx and Rx's the following you will have to find out and match up: the Tx and Rx must be operating on the same band 27 Mhz, 72 Mhx or 49 Mhz. Some of these park flyers use the limited power 49 Mhz in the US. Next the Tx and Rx need to be capable of functioning on either AM, FM (PPM) or PCM modulation types. If FM then both the Tx and Rx must be capable of functioning on either positive or negative modulation shift. And finally both the Tx and Rx need to be on the same channel of the respective band.

You need to find out what channel your Tx is on, most crystals are imprinted with the actual frequency and you can refer to the AMA channel chart to find out what channel you are on. Some of these low cost park flyers do not interface very well with conventional equipment and yes its poor practice to intermix rx crystal brands, all combinations do not work. AM and FM Rx crystals are not interchangable, its always wise to buy a new crystal with a new rx of the same brand and appropriate to the model Rx you order.

John