Need Grant LT (or similar) Channel Selector

[brandon7861]

I wonder if it is the same as the one in the washington. I see that the grant has the diodes on the switch PCB rather than on the main PCB, but I bet the switch is the same.

Back when I did my excel calc for the 8719, I found out that the PLL data is the same for both the 11.1125MHz and the 11.325MHz boards. The only difference is whether pin 10 is floating or grounded. Since the grant uses 11.325MHz with the same PLL and pin 10 floating, I have to assume the binary is the same as the washington with the 11.1125MHz crystal and pin 10 grounded.

 

[SuperLid]

I wonder if it is the same as the one in the washington. I see that the grant has the diodes on the switch PCB rather than on the main PCB, but I bet the switch is the same.

Back when I did my excel calc for the 8719, I found out that the PLL data is the same for both the 11.1125MHz and the 11.325MHz boards. The only difference is whether pin 10 is floating or grounded. Since the grant uses 11.325MHz with the same PLL and pin 10 floating, I have to assume the binary is the same as the washington with the 11.1125MHz crystal and pin 10 grounded.

I believe the same switch is used for numerous radios and PLL's.

 

[loosecannon]

Can the outer plastic be swapped with one from a different switch while keeping the green switch sections the same? I've never taken one apart so I don't know.

the answer to this question is absolutely yes.

ive done it at least three times.

it's kind of funny to think about just how much experience i have taking these damn channel switches apart.

if anyone is planning on doing this, i HIGHLY suggest you take a million pictures of every step of disassembly.

it is very easy to put it back together incorrectly, and these switches can only be taken apart so many times before you can't get that back metal plate to stay in place.

the big thing to know here is to cut around the edges of the white plastic holding that metal plate in place and leave the "nub" in place.
you'll need it so you can re-melt the plastic in place once you're done.

there might be a thread on the forum where i go into detail about it but i honestly can't remember. i know ive talked about it before on here.
LC

 

[SuperLid]

the answer to this question is absolutely yes.

ive done it at least three times.

it's kind of funny to think about just how much experience i have taking these damn channel switches apart.

if anyone is planning on doing this, i HIGHLY suggest you take a million pictures of every step of disassembly.

it is very easy to put it back together incorrectly, and these switches can only be taken apart so many times before you can't get that back metal plate to stay in place.

the big thing to know here is to cut around the edges of the white plastic holding that metal plate in place and leave the "nub" in place.
you'll need it so you can re-melt the plastic in place once you're done.

there might be a thread on the forum where i go into detail about it but i honestly can't remember. i know ive talked about it before on here.
LC

That's great, but I don't have a switch, which is why I started this thread.

 

[Eldorado828]

The switch that is pulled and in your hand, looks like the right switch, if the shaft is the correct length. I am not sure what the markings mean on these switches.

What is the measurement on the one you have? I'll put the caliper to the one you're talking about and let you know. I'll try this evening or tomorrow.

 

[SuperLid]

What is the measurement on the one you have? I'll put the caliper to the one you're talking about and let you know. I'll try this evening or tomorrow.

From the rear of the shaft to the front, it is 2 3/8". Both of your switches look similar, 6 gangs, same pin pattern.

 

[Onelasttime]

This is why I say if you own old radio's owning at least 2 one to use and one for parts is smart!

I have 2 Cobra 138XLR's, 2 Uniden Grant LT's, 1 Cobra 148GTl, 2 Slant Face Sears Road Talkers, a parts HR2510 to keep my Lincoln going etc...... Parts are finite for these old rigs because no one makes radio's the way they used to and China is nto making a lot of the parts they made up until Covid-19. I own 4 Realistic 465's.

It is not that I do not own modern throw away radio's I do like the radiodity line. I also love my old vintage gear and some parts are almost as costly to source as an entire parts donor rig!

 

[Eldorado828]

@SuperLid
Here you go, both that I have are the same measurements. My apologies for the delay, life keeps me busy.

 

[SuperLid]

Same physical size. I suppose if the switch is different, I could swap the switch gangs into the intact switch body. What model radios are yours from?

Thanks

 

[nomadradio]

Pretty much any Uniden SSB CB with the 8719 or 8734 PLL uses the same selector. Counts from binary equivalent of 16 to 61. The LED display hookup is the same for all of them. If memory serves, the type numbers are SR208 and SR209. Only difference between them is the shaft length. Some but not all base radios use a longer shaft than mobiles.

73

 

[SuperLid]

Pretty much any Uniden SSB CB with the 8719 or 8734 PLL uses the same selector. Counts from binary equivalent of 16 to 61. The LED display hookup is the same for all of them. If memory serves, the type numbers are SR208 and SR209. Only difference between them is the shaft length. Some but not all base radios use a longer shaft than mobiles.

73

Problem is I don't have a switch and I'm looking for one.

 

[Cable Guy]

I have a 142gtl parts rig if that will help, I can get a pic of the switch if you want.

Edit, I just looked, it is a SR 209. Need just the switch or the board/led too? I haven't taken it out yet.

 

[SuperLid]

I have a 142gtl parts rig if that will help, I can get a pic of the switch if you want.

Edit, I just looked, it is a SR 209. Need just the switch or the board/led too? I haven't taken it out yet.

Switch only! No need for pic, I know that is the correct one! Thank you, please PM.

 

[nomadradio]

The pins on those switches are incredibly delicate. If a pin is folded flat against the foil pad be very, very gentle prying it up to unsolder and remove from the pc board. They break off way too easily.

No need to ask me how I know.

73

 

[Onelasttime]

Maybe a Digimax or some other such! This eliminates the channel selector and goes to encoder. Something to consider!