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Synthesized TXs?

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Old 02-14-2005, 04:51 PM
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gazevedo
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Default Synthesized TXs?

Need help with picking a new transmitter. A senior guy at my field threw me for a loop by telling me my search criteria should have a synthesizable TX. I was laready set on either a JR9303 or a Futaba9CAP, but i had no intention of buying the synth TX module for the 9CAP. What does every one else think? I don't have a lot of "legacy" RXs so I wasn't worried about that. At worst I would have to sell one RX.

Basically, how many people think Synth. TX are that big of a deal. Also, am I correct that JR does not have them and Futaba only has them for the 9CAP (manual switch movement on module) and 9ZWC2 (dynamic trhough TX .... nice!) and Hitec has one for their 7 channel. I also believe that Royal has them but have not heard good things about them.

Opinions appreciated....

Thanks in advance,

-- George
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Old 02-14-2005, 06:18 PM
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XJet
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Default RE: Synthesized TXs?

If you fly from a busy field then a synth Tx can save you a lot of waiting for the peg -- but don't forget that unless you also have a synth receiver you'll need a bunch of receiver crystals and the patience required to change them as/when required.

I have to admit though that the combination of a Hitec Optic 6 with Spectra and a Polk Seeker 6 or Sombra Shadow (both synthesized) makes for a mighty handy combo when you're trying to fly with a lot of other modellers.
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Old 02-14-2005, 07:41 PM
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JohnBuckner
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Default RE: Synthesized TXs?

As is the case with Hitec, the older Prism 7X, the Optic 6 and the Eclipse 7 as well as one of their surface radios all can use either the 72Mhz (air band) or the 75Mhz (surface band) synth modules. All three also have selectable modulation shift.

An important thing to remember is to get the total capability of using any FM (PPM) Rx Dual or single conversion, It is also neccessary for the Tx to also have selectable modulation shift or you will still not have total compatability. This is of course does not apply if the Rx has auto or manual shift select But the majority out there do not.

The combination of Tx shift select and syth freq selection in the Tx is the key. Presently JR and Futaba do not have this combination on any of their Tx's. Futaba is about to get a syth module but there will be no shift select on their Tx's. Airtronics now has some Tx,s with shift select but no synth module. Polks radio is looking interesting.

I know most folks say that they don,t need these two features but if you stay in the activity any length of time it will surprise you when begin to acqure more and more airplanes that start showing up in your hanger and rx's of all descriptions. Most never begin to appriciate the versatility that is afforded untill they actually get a radio like that and result is always the same: I will never agine buy a radio without both Tx synth and modulation shift capability.

John
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Old 02-14-2005, 10:21 PM
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Scar
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Default RE: Synthesized TXs?

I think it's a good idea for a number of reasons, which may or may not apply to you.

I do instruction, and a number of my students have Hitec or Futaba transmitters. I have a Prism with the synth module, and can set it up to train them and they can use their own transmitter as the student box. Or they can use my Futaba SS6 as a buddy box, and my Prism can fly their JR or Airtronics equipped trainer.

I wound up with so many planes I wanted the 99 model memory of the Polk Tracker II. Works great for me. I see they're going to sell a Tracker III, with a trainer port and other new features, so I'll probably get one of them and sell my Tracker II.

If you have one plane, or two, and plan to stick with them (say, to fly pattern) you really don't need a synth... but you might want to buy an extra module on a different frequency, and an RX crystal. That way you have a couple choices, at contests and such.

Good luck,
Dave Olson
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