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05-04-2005 03:58 PM  12 years agoPost 1
kickoraptor

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Reading, UK

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I was in the process of ordering my TX Futaba FF7 and was confronted with the same question that was asked yesterday.
Ive have a Hitec 6ch receiver and Im going to get Futaba 35mhz crystals but do I need Dual or single conversion.

thanks for your help.
Nick

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05-04-2005 06:30 PM  12 years agoPost 2
Herc

rrKey Veteran

Cranbrook, BC - Canada

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I have a Hitec Optic 6 Tx and Electron 6 Rx and it is Dual Conversion. If you check out the vendor listing the Electron 6 I think it will tell you that it's Dual Conversion. The Crystals come for Futaba/Hitec or JR/Airtronics though.

Hope this helps if you haven't found your answer already. Just double check with the vendor and I'm sure they will give you what you need.

Cheers

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05-06-2005 04:11 PM  12 years agoPost 3
kickoraptor

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Reading, UK

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I got this comprehensive answer from Al's Hobbies:

A. A single conversion receivers have only one "mixer" stage. The receiver
takes the incoming signal and mixes it with the local oscillator signal. The
different frequency is then amplified as the Intermediate Frequency (IF) and
detected for use. The draw back with single conversion is that there is a
chance of "image" reception. This is where, depending on the receiver
tuning, the receiver will pick up an image of another frequency at either
the high or low end of the band.

A dual conversion receiver has two mixer stages and two local oscillators.
This eliminates the chances of image reception. Dual conversion also allows
for better interference rejection.

Thanks

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