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uniden grant xl 10 meter mod

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Old 11-17-2009, 07:25 AM
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Default uniden grant xl 10 meter mod


Has any one done this mod on there grant
10 Meter Conversion

***For Licensed Amateur Radio Operators Only*** This very easy conversion of your XL will give you a back up SSB 10 meter radio. Find crystal "X3" which is a 11.325 MHz Change crystal "X3" to a 11.6908 MHzThis will give you 28.060 MHz to 28.500 MHz

Just found it and have been wanting a 10 meter radio for my jeep
and since i can't afford one just now

Thanks
KD0GOJ


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Old 11-17-2009, 03:45 PM
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There was some discussion here a long time ago about doing this on a Cobra 148GTL (same radio). I remember some saying that it works quite well!

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Old 11-17-2009, 04:02 PM
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Quote:
Frequency conversions by crystal changes

This mod came from a forum I am a moderator on:
(You need to change the crystal at location X3)

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" 11.6908MHz gives 28.060MHz to 28.500Mhz (Ham 10 Meter) operation in Cobra/Uniden CB's that originally had 11.3258MHz in them "
You really just need 28.300 to 28.500 for voice, the lower part of the band is CW.
You can use a 11.4758MHz to get the high band, or a 11.1758MHz to get the low band instead if that is what you need.
You can get new crystals from Kens Electronics:
CB & Amateur Ham Radio crystal frequency list at Ken's Electronics, (Wholesale & Retail Electronic Parts) Kalamazoo, Michigan
I believe this is one.
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Old 11-17-2009, 04:23 PM
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Q: When this mod is done; isn't it also necessary to 'broadband' the TX - or else a loss of power due to filtering restrictions still present?
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Old 11-17-2009, 04:43 PM
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Thanks for the info guys
I will be talking to the local tech and see what it cost.
I think it is a little over my level of skill.
I will see if santa will have it done for me.
Thanks again
KD0GOJ

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Old 11-17-2009, 05:20 PM
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Quote:
Originally Posted by Rob KI6USW View Post
Q: When this mod is done; isn't it also necessary to 'broadband' the TX - or else a loss of power due to filtering restrictions still present?

You will probably have to broadband the bandpass filter otherwise you can get some power drop off. There is a discussion about that mod in this thread:

http://www.worldwidedx.com/radio-rad...rant-mods.html

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Old 11-17-2009, 08:07 PM
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if you just change the crystal; you will just have to re-align the radio for that freq range.
you wont have to broadband it.

if you want to keep the CB band and be able to switch back and forth between 10 and 11 meters; you will have to broadband the radio, but you will still experience a power drop at the band edges.

best bet is just to change the crystal and have the radio realigned for the new freq range.

good luck, and make sure you get a crystal with the right characteristics. otherwise the SSB will suffer.
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Old 11-21-2009, 02:07 PM
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Quote:
Originally Posted by loosecannon View Post

if you want to keep the CB band and be able to switch back and forth between 10 and 11 meters; you will have to broadband the radio, but you will still experience a power drop at the band edges.
I wouldn't have thought the drop off at band edges would be too severe as its only 1.5 mhz bandwidth,a realignment would probably suffice although I am not familiar with that chassis and slight broadbanding may be necessary to vco or tx mixer.
Quote:
Originally Posted by loosecannon View Post
best bet is just to change the crystal and have the radio realigned for the new freq range.
Couldn't agree more for optimum performance.
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Originally Posted by loosecannon View Post
good luck, and make sure you get a crystal with the right characteristics. otherwise the SSB will suffer.
Very good advice,the wrong load capacitance on the new crystal could have dire effects on clarifier circuit swing.

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LinkBack to this Thread: http://www.worldwidedx.com/home-brew/37151-uniden-grant-xl-10-meter-mod.html
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