Changing Frequencies.....danger??

[John Ferrell]

Actually, a Licensed Amateur Radio Operator is permitted to build the 
transmitter if he chooses.

John Ferrell
http://DixieNC.US

----- Original Message ----- 
From: "dwaynenancy" <dwaynenancy at cox.net>
To: <discussion at nsrca.org>
Sent: Wednesday, June 29, 2005 11:27 PM
Subject: Re: Changing Frequencies.....danger??


>I forgot to say in my previous post but it is legal for ham operator to 
>change a crystal in the 50 MHz or 6 meter band.  No one but the factory can 
>do that on 27, 72 or 75 MHz except by changing Tx modules.  It's okay to 
>change crystals in the receiver.  Note that Futaba has low/high receivers 
>too.  Dwayne
> ----- Original Message ----- 
> From: "Ed White" <edvwhite at yahoo.com>
> To: <discussion at nsrca.org>
> Sent: Wednesday, June 29, 2005 10:16 PM
> Subject: RE: Changing Frequencies.....danger??
>
>
>> I've done this (flown on chan 16 and 29 on 72 MHz and
>> chan 00 on 50 MHz) and done this with both my Futaba
>> Super 7 and 8UA transmitters with no problem.  The 9C
>> uses the same module.  You can do this freely and
>> legally.  This is not the same as changing a crystal
>> in the transmitter.  To the FCC what we call the
>> module they consider the entire transmitter, except
>> for antenna.
>>
>> But Steve is absolutely correct, the receiver is a
>> completely different matter.
>>
>> --- RC Steve Sterling <rcsteve at tcrcm.org> wrote:
>>
>>> No problem in a 9C. That module in the back that you
>>> swap to change
>>> frequency is a self contained module, no RF parts in
>>> the rest of the
>>> transmitter (except the antenna I guess). You can
>>> even switch to 6 meters
>>> which is 20 mhz away.
>>>
>>> Receiver is a completely different story.
>>>
>>> -----Original Message-----
>>> From: discussion-request at nsrca.org
>>> [mailto:discussion-request at nsrca.org]On Behalf Of
>>> F3AFlyer7 at comcast.net
>>> Sent: Wednesday, June 29, 2005 5:41 PM
>>> To: discussion at nsrca.org
>>> Subject: Changing Frequencies.....danger??
>>>
>>>
>>> Well I've heard a couple of opinions on this so I
>>> figure I'd get some more.
>>> I need to get a new frequency for the NATS but don't
>>> want to send my
>>> transmitter in. I have a Futaba 9C. Some have told
>>> me that I can change as
>>> many frequencies as I want without mishap, while
>>> others have told me that
>>> you can only go 6 up or 6 down or else your transmit
>>> range gets shorter. Is
>>> this true for transmitters with crystals in them
>>> only, or for both crystal
>>> and module transmitters? If this is also true for
>>> module transmitters, then
>>> why are there synthesized modules for the 9C?
>>>
>>> Thanks!
>>>
>>> Scott
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>>
>>
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