Wondering If I can get quick help identifying something for me

[jwile20vt]

Going to jump course for a night and pick someone's brain on a small project I've been working on . One of my fav. parts of radio hobby CB / HAM or whatever I love fixing/restoring radios and tinkering with problem units try to get them to work .

Could someone please help me and tell me ... in uniden radios , specifically this Grant XL I'm trying to get working again . Upon opening this Grant I saw a mangled adjustable diode or something , that's what my question is .What exactly are these called pictured in the attachment ? it calls for you to adjust VR10 and VR11 for mod. and such when tuning/aligning , It seems that whoever owned this radio at some point tried to do something and the white top isn't there so no adjustment can be made , and I think that's what is causing this radio to no TX , like there's no power .. meter moves slightly but nothing booming

Thank you for taking a minute to read and help if you can

Jeremy

 

[mancow]

Potentiometer (variable resistor) aka "pot"

The one on the right is 3k ohms (3000) ohms

cant really tell on the other but looks to be the same.

Don't know what you mean by white part isn't there because they look complete. Put your DVM on one bottom leg and one lead on the top center and move the top portion. The ohms reading should change.

 

[Chopswell]

Looks like

Aren't those two modules (that you can insert small screwdriver and adjust) called the "peaker and tweeker?" lol. I once had a Uniden Grant and could use my SWR-RF meter and while keying the mic, adjust the output power and on receive, turn up and it would increase the volume (far away stations).

 

[jwile20vt]

Aren't those two modules (that you can insert small screwdriver and adjust) called the "peaker and tweeker?" lol. I once had a Uniden Grant and could use my SWR-RF meter and while keying the mic, adjust the output power and on receive, turn up and it would increase the volume (far away stations).

This is what I think the original owner was trying to do , I am going to take a pic of the one thats mangled . I was trying to pick my brain but to my knowledge these were what you adjusted for tweaking a Grant .

original owner didn't know what he had ... my heart kinda broke when i opened it and saw some damage to one of those pots . ill post pics later , would love to fix it if I could .

 

[drouse3]

This is what I think the original owner was trying to do , I am going to take a pic of the one thats mangled . I was trying to pick my brain but to my knowledge these were what you adjusted for tweaking a Grant .

original owner didn't know what he had ... my heart kinda broke when i opened it and saw some damage to one of those pots . ill post pics later , would love to fix it if I could .

Are you using the radio meter to adjust this radio? The meter on the radio may have adjusted giving you a false reading. VR-10 should raise your am power. Also those parts do not look damaged.

 

[jwile20vt]

yes I was just checking the radio meter , The picture above I used was just a example . I was able to snap a couple tonight of the exact i'm working on , it looks like it is VR-10 that's pretty much not there ..as you can see below , Its rather disgusting . only other problem when I checked it over looked to be random 2 wires that were disconnected but I found where they go , just don't know which color goes on which pin . Images below of both the broken POT and the random 2 wires that were removed. I can replace POT's right ? least it looks like it .
Its a nice not long story but I won't bore anyone . Al I know is its in the hands of someone who appreciates it now , the reason I mention I think him trying to tweak it is because it is vr-10 which before was mentioned here I goggled a few threads in first place cause when I was given the radio the father did tell me his son looked stuff up on the web and was sure he was trying to make it better . when the radio was found with covers off and the 2 wires hanging there the father took it , was inherited from fam member. Anyways , pics below I really want to thank you guys for the replies already .

 

[drouse3]

It looks like someone tried to hook up a power knob. The random two wire you removed may have gone to a control knob so the power could be adjusted. Also, Yes it can be replaced it if you have a replacement.

 

[jwile20vt]

awesome , I can replace VR-10 POT also right ? well whats left of it I should say .... Anyone have a part number for a POT... Would love to jump on this to get it back working .

Looks pretty simple granted you know how to solder and such , which i've done a good amount of when contracting for local computer shop . After replacing that VR-10 pot you mentioned also it was for AM power..I can just readjust with a meter right ? get it back to normal

Thanks again for all the help from everyone

Jeremy

 

[jwile20vt]

just to put the final page on a thread if anyone every searches this in future

Ended up cleaning and removing what was left of the VR10 pot , soldered a wire from each hole on the board where the potentiometer was and ran it to my SWR cal knob . looses the SWR cal but can just run a external meter for now or drill hole and add a 5k potentiometer to the side of the chassis.

also makes it adjustable AM power .