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Hmmm...

Interestingly enough, much of what we use today is based upon the notion that 10-11MHz signals are "no-mans Land" (WWV) region where no one maker can use that spectrum, so it's been reserved for other use - being that 10MHz IF being the most predominate signal out there - 10.240 is another spot of use in that tiny bit of spectrum.

When you realize how strong that 10.240 signal is inside a radio - I can understand your desire to feel "I don't want it" because of what damage it can do.

But you would need something there to inject - for if you did work on CB radios the 10.240 is really for the 10.7MHz IF to SUBTRACT from to obtain the 455kHz image the last stage of the radio needs.

So that means
Your Radios' IF frequency would only be 16 to 17MHz - TO OBTAIN 10.7MHZ IF
The only way to get audio from 10.7MHz IF is to MODULATE a carrier signal
then tune in on that image then use the output BEFORE that last MIXER stage that mixes in the 10.240 from the Main Xtal IF so, it can obtain the 455kHz Image and IF from that mixing product. This section just BEFORE the 10.240 signal - is your best shot at getting a low-noise 10.7MHz signal (non-aliasing)
once you get a 10.7MHz IF Carrier - then it can be usefully injected into ANY radio using such a strip.
you get two IMAGES from that 10.7MHz - one containing ACTUAL 10,7MHz - the other being the rejected RF signal it's trying to obtain that image from - just so you know.
So, if you're fixing someone's "ham Amateur" (*GASP*~*OMG*) and it happens to be a Galaxy - the above process would work - just not guaranteed to fix Yahoo or Kenwood or ADI or Baofeng (sp?) or something exotic using a part of the IF spectrum others are not supposed to know...

<blockquote data-quote="Handy Andy" data-source="post: 781947" data-attributes="member: 52309">Hmmm...Interestingly enough, much of what we use today is based upon the notion that 10-11MHz signals are &quot;no-mans Land&quot; (WWV) region where no one maker can use that spectrum, so it&#039;s been reserved for other use - being that 10MHz IF being the most predominate signal out there - 10.240 is another spot of use in that tiny bit of spectrum. When you realize how strong that 10.240 signal is inside a radio - I can understand your desire to feel &quot;I don&#039;t want it&quot; because of what damage it can do.But you would need something there to inject - for if you did work on CB radios the 10.240 is really for the 10.7MHz IF to SUBTRACT from to obtain the 455kHz image the last stage of the radio needs.So that means
<ul style="margin-left: 20px">
<li data-xf-list-type="ul">Your Radios&#039; IF frequency would only be 16 to 17MHz - TO OBTAIN 10.7MHZ IF <ul>
<li data-xf-list-type="ul">The only way to get audio from 10.7MHz IF is to MODULATE a carrier signal</li>
<li data-xf-list-type="ul">then tune in on that image then use the output BEFORE that last MIXER stage that mixes in the 10.240 from the Main Xtal IF so, it can obtain the 455kHz Image and IF from that mixing product. This section just BEFORE the 10.240 signal - is your best shot at getting a low-noise 10.7MHz signal (non-aliasing) <ul>
<li data-xf-list-type="ul">once you get a 10.7MHz IF Carrier - then it can be usefully injected into ANY radio using such a strip.</li>
<li data-xf-list-type="ul">you get two IMAGES from that 10.7MHz - one containing ACTUAL 10,7MHz - the other being the rejected RF signal it&#039;s trying to obtain that image from - just so you know.</li>
</ul></li>
</ul></li>
</ul>So, if you&#039;re fixing someone&#039;s &quot;ham Amateur&quot; (*GASP*~*OMG*) and it happens to be a Galaxy - the above process would work - just not guaranteed to fix Yahoo or Kenwood or ADI or Baofeng (sp?) or something exotic using a part of the IF spectrum others are not supposed to know...</blockquote>

[QUOTE="Handy Andy, post: 781947, member: 52309"] Hmmm... Interestingly enough, much of what we use today is based upon the notion that 10-11MHz signals are "no-mans Land" (WWV) region where no one maker can use that spectrum, so it's been reserved for other use - being that 10MHz IF being the most predominate signal out there - 10.240 is another spot of use in that tiny bit of spectrum. When you realize how strong that 10.240 signal is inside a radio - I can understand your desire to feel "I don't want it" because of what damage it can do. But you would need something there to inject - for if you did work on CB radios the 10.240 is really for the 10.7MHz IF to SUBTRACT from to obtain the 455kHz image the last stage of the radio needs. [INDENT]So that means [LIST] [*]Your Radios' IF frequency would only be 16 to 17MHz - TO OBTAIN 10.7MHZ IF [LIST] [*]The only way to get audio from 10.7MHz IF is to MODULATE a carrier signal [*]then tune in on that image then use the output BEFORE that last MIXER stage that mixes in the 10.240 from the Main Xtal IF so, it can obtain the 455kHz Image and IF from that mixing product. This section just BEFORE the 10.240 signal - is your best shot at getting a low-noise 10.7MHz signal (non-aliasing) [LIST] [*]once you get a 10.7MHz IF Carrier - then it can be usefully injected into ANY radio using such a strip. [*]you get two IMAGES from that 10.7MHz - one containing ACTUAL 10,7MHz - the other being the rejected RF signal it's trying to obtain that image from - just so you know. [/LIST] [/LIST] [/LIST][/INDENT] So, if you're fixing someone's "ham Amateur" (*GASP*~*OMG*) and it happens to be a Galaxy - the above process would work - just not guaranteed to fix Yahoo or Kenwood or ADI or Baofeng (sp?) or something exotic using a part of the IF spectrum others are not supposed to know... [/QUOTE]

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