ORIGINAL: da Rock
//snip//
When any mfg says their RXs are single conversion that means they also sell double conversion. And they make the singles to sell for park flyers.
When a RX doesn't say it's double or single, that doesn't mean it's single. A lot of max strength RXs say nothing because the mfg doesn't use single/double conversion circuit design in his brand of RXs.
You will have to get up early to be more wrong than those statements.
djsdog; Forget the Kraft. If not already changed to narrow (20KHz) band, then the FCC grandfather time has run out.
>>>>
FYI: AMA Membership Manual
Transmitter requirements:
Narrowband transmitters are required for use with all
Channel number frequencies (CH 00-09 and 11-90).
Identification of narrowband transmitters is normally
accomplished by a sophisticated laboratory test. Narrowband
transmitters can also be identified as follows:
1. All PPM/FM and PCM/FM transmitters are narrowband. Only
AM transmitters sold as new, prior to March 1993, are suspect.
2. The manufacturer of a suspect AM transmitter can verify if it is
narrowband. If it is not, the manufacturer may offer to modify it to
narrowband specifications.
3. AM transmitters that were verified by test to be narrowband prior to
March 1998, are considered to be narrowband. A gold-color sticker,
marked “R/CMAAMA - RF CHECK” was formerly used to identify
these tested transmitters. However, it is no longer required to display
the R/CMAAMA Gold Sticker on these transmitters.
Any user modification of a Transmitter that might affect the
transmitted signal is prohibited by law and safety concerns. This includes
user replacement of frequency determining plug-in crystals and use of
plug-in frequency modules from another manufacturer. Transmitter
crystal replacement, with or without a change in frequency, requires
transmitter emission realignment by the manufacturer. Use of a frequency
determining module manufactured for use in another brand transmitter,
can result in off frequency and spurious emissions that cause interference
to other fliers.
Receiver requirements:
Receivers that meet the AMA Guidelines of reference 2 are
recommended for use at flying sites where several Channel number
frequencies are in simultaneous use. Receivers that do not meet the AMA
Guidelines (reference 2) may experience interference when operated at an
active flying site with several transmitters operating simultaneously.
<<<<<
It is not against FCC to use an old WIDE band receiver. However if you do, it will be subject to interference form another close channel transmitter or the pagers operating on the 10KHz off the rcvr. channel. It's YOUR airplane for
one flight so have at it if you must.
edited because of screw-up on my part. Wide vice narrow.