[NSRCA-discussion] Fwd: Futaba 9z with Spektrum SPMMSFUT7

[Ron Van Putte]

Forwarded for John Pavlick (again).

Ron


Begin forwarded message:

> From: John Pavlick <idsmail at sbcglobal.net>
> Date: September 7, 2007 1:10:27 PM CDT
> To: vanputte at cox.net
> Subject: Re: [NSRCA-discussion] Futaba 9z with Spektrum SPMMSFUT7
>
> I was thinking the same thing, but what do I know? I'm a Software  
> Engineer! <LOL> I asked my boss the Analog Design Guru and guess  
> what? We ALL have the same suspicions. Hmm. That's why it would be  
> a good idea to range check this stuff. Then again maybe I'm just  
> being too cautious. <VBG>
>
> John Pavlick
>
> Ron Van Putte <vanputte at cox.net> wrote:
> I don't know about whether it makes a difference or not, but I do  
> know that the higher frequency means that the signal's wavelength  
> will be much shorter than that for 72 MHz and I would think that  
> the 2.4 GHz signal would be susceptible to distortion from an  
> adjacent 72 MHz antenna.  However, what do I know about electronics  
> and radio frequency distortion; I'm an aeronautical engineer?
>
> Ron
>
> On Sep 7, 2007, at 12:28 PM, george w. kennie wrote:
>
>> I would guess that when you plug in the S.S. module, the original  
>> output signal path is interupted and redirected to the 2.4  
>> antenna. So with no signal going to the original antenna it  
>> doesn't make any difference whether you remove it, leave it in,  
>> extend it, or collapse it, ..........it's just along for the ride.
>>
>>
>>
>> ----- Original Message -----
>> From: Dave Smith
>> To: NSRCA Mailing List
>> Sent: Friday, September 07, 2007 1:08 PM
>> Subject: Re: [NSRCA-discussion] Futaba 9z with Spektrum SPMMSFUT7
>>
>> According to Krysta,the antenna for the 9C just retracts into its  
>> case.  I would guess other Futaba TX's would have the same feature.
>>
>> Dave
>> ----- Original Message -----
>> From: Bob Richards
>> To: NSRCA Mailing List
>> Sent: Friday, September 07, 2007 1:48 PM
>> Subject: Re: [NSRCA-discussion] Futaba 9z with Spektrum SPMMSFUT7
>>
>> I have not removed my 72mhz antenna. Of course, I have not flown  
>> it yet. I'll have to review the instructions to see what they say.  
>> I can't imagine the antenna would have to be removed, just fully  
>> retracted.
>>
>> Bob R.
>>
>>
>> Ron Van Putte <vanputte at cox.net> wrote:
>> I assume that you must remove the 72 MHz antenna from the transmitter
>> in order to have the Futaba TM-7 module function at its best. True?
>>
>> Where are the TM-7 module and R607FS receiver available? Tower still
>> says availability in "early September".
>>
>> Ron
>>
>> On Sep 7, 2007, at 9:36 AM, Bob Richards wrote:
>>
>> > >>>Futaba ought to be ashamed of putting this out!
>> > Jerry
>> > <<<
>> >
>> > Pardon me, but this was NOT Futaba, this was Spektrum.
>> >
>> > I have just purchased the TM-7 2.4ghz module, that was made by
>> > Futaba. Does not look like a kludge to me, IMHO. I can very easily
>> > swap between the 2.4ghz and 72mhz modules at any time (and probably
>> > will for a while).
>> >
>> > Bob R.
>> >
>> >
>> >
>> > _______________________________________________
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