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Grant II Clarifier

Tucker442

101E
Oct 30, 2010
954
147
53
67
Jamesburg NJ
Has anybody figured out how to unlock the clarifier on the new Grant II? Mine is dead on center slot but talkiing skip would be nice to be able to slide a little. Thanks for your comments in advance
 

Robb

Yup
Dec 18, 2008
11,427
3,541
323
Silicon Valley CA, Storm Lake IA
Clarifier mods are all the same, in that they all need to have two things in common to work. They may have differeing instructions as how to do them for a particular radio, but basically uses the same two concepts. The first maneuver is to get a +8v feed to the clarifier pot, so that it can feed the varactor in both TX and RX situations. The next is to remove a blocking diode that keeps that +8v out of the TX loop osc circuit.

The problem with all of this, is that Uniden has a nasty habit of not supplying the schematics to their radios nor gives them to the general public, as this would make it easier to do mods to them. Bad Uniden; no cookie. So, you will either have to send it in to a shop that has the schematics, or take a chance of ruining your radio. I vote that you send it in . . .
 
Last edited:

sdmahr

Active Member
Dec 14, 2012
153
31
38
Clarifier mods are all the same, in that they all nrrd to have two things in common to work. They may have differeing instructions as how to do them for a particular radio, but basically uses the same two concepts. The first maneuver is to get a +8v feed to the clarifier pot, so that it can feed the varactor in both TX and RX situations. The next is to remove a blocking diode that keeps that +8v out of the TX loop osc circuit.

The problem with all of this, is that Uniden has a nasty habit of not supplying the schematics to their radios nor gives them to the general public, as this would make it easier to do mods to them. Bad Uniden; no cookie. So, you will either have to send it in to a shop that has the schematics, or take a chance of ruining your radio. I vote that you send it in . . .
Even the shops don't have the schematics...................
 
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Tucker442

101E
Oct 30, 2010
954
147
53
67
Jamesburg NJ
Well the Uniden 980 was a very stable radio but lacked some things that European radio operators like higher channels and half channels which the Grant II does. The chassis's are a lot alike I was just hoping if I started this thread the guy who unlocked his would give us some info. I already put a call into my favorite radio guru so I will find out tomorrow if it's possible he has been doing things with the 980 so time will tell
 
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sdmahr

Active Member
Dec 14, 2012
153
31
38
Well the Uniden 980 was a very stable radio but lacked some things that European radio operators like higher channels and half channels which the Grant II does. The chassis's are a lot alike I was just hoping if I started this thread the guy who unlocked his would give us some info. I already put a call into my favorite radio guru so I will find out tomorrow if it's possible he has been doing things with the 980 so time will tell
I have both radios. I unlocked the 980 after watching LesComm do it on YouTube. Worked very well. I don't recall exactly, but when I looked at my Grant II I thought it was enough different to make me NOT try it. I've been waiting for the correct answer on how to get it done. Please share if you come up with something that works ! ! !
 

Tucker442

101E
Oct 30, 2010
954
147
53
67
Jamesburg NJ
Clarifier mods are all the same, in that they all need to have two things in common to work. They may have differeing instructions as how to do them for a particular radio, but basically uses the same two concepts. The first maneuver is to get a +8v feed to the clarifier pot, so that it can feed the varactor in both TX and RX situations. The next is to remove a blocking diode that keeps that +8v out of the TX loop osc circuit.

The problem with all of this, is that Uniden has a nasty habit of not supplying the schematics to their radios nor gives them to the general public, as this would make it easier to do mods to them. Bad Uniden; no cookie. So, you will either have to send it in to a shop that has the schematics, or take a chance of ruining your radio. I vote that you send it in . . .

Rob I called my very good radio tech and he said Uniden has still not released wiring diagrams for the Grant II
 
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jazzsinger

Bullshit Buster
Jul 3, 2008
1,750
329
93
United Kingdom
Rob I called my very good radio tech and he said Uniden has still not released wiring diagrams for the Grant II



Maybe if you look in right place you'll find schematic.

Go to servicedocs.com search by brand dropdown. Select President and scroll down to Grant 2 schematic. As well aa schematics/user manuals and service manuals for most European Presidents ;)
 

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