[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: FT-726R info?

The FT-726R must have the optional 'satellite board' to be able to operate
in duplex (satellite) mode.  That's the first thing you should check out.

There's not much to explain about FT-726R satellite operation because there
is no frequency tracking feature and there are no satellite memories.  You
put it in satellite mode, and it is then it can transmit and receive
simultaneously (assuming the transmit and receive VFOs are on different
bands).  All tuning and mode switching is done manually.

Assuming you have the satellite board, you must separately tune the RX and
TX frequencies/modes.  It's cumbersome because there is only one tuning knob
and one frequency display.  You feel like you will wear out the VFO selector
switch when operating in satellite mode.  And you inevitably QRM the band
every time you change frequency, in order to zero beat your transmit
frequency to the new receive frequency.

But it does work.  I used a FT-726R on AO10 and AO13 and made a LOT of
contacts. But it takes some practice to quickly "zero-beat" your transmit
frequency after tuning the receiver.  I used a little lookup table that told
me the approximate TX frequency for each 5 kHz change of RX frequency in the
AO13 and AO10 passbands.  For AO40 the same method sometimes doesn't work
very well because the Doppler shift is so much greater.  For that, it's
probably best to use a spreadsheet where you enter the RX frequency and MA,
and the spreadsheet calculates the TX frequency.  Even that may not be very
accurate if your downconverter drifts a lot.

Wayne Estes W9AE
Mundelein, IL, USA

Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org