uniden grant xl

[bronco]

i have this radio w/extra channels, and i would like to know, if is possible to add 10kz swicth!!
thanks

[mat_me]

I just bought a Grant Xl as well and it has the Extra channels and a 10 K switch added. I am not sure how it was done, only that it is possible.

[mat_me]

I just bought a Grant Xl as well and it has the Extra channels and a 10 K switch added. I am not sure how it was done, only that it is possible.

If you google search "adding a 10 K switch to a grant XL" the first result talks about how to do it in what looks like pretty good detail

[cfox]

What's a 10k switch do? I think I may have one of those on my President Grant. There's a 3 position switch on the underside. Front position and middle recieve AM but the back position doesent. May not be what I have. I'm just trying to figure out what the switch does.

[015reddog]

i have this radio w/extra channels, and i would like to know, if is possible to add 10kz swicth!!
thanks

I have always wondered what the novelty of the 10k switch was. Correct me if I am wrong, but doesn't it just move you up one channel, something you can do by just using the channel changeing knob? I don't get it.

REd

[TheCBDoctor]

Hi bronco

Locate pin 16 on the PLL. This is the least significant bit on the binary count for the PLL. Cut the trace going to pin 16 and place 5.6 K ohm resistor across this cut. Take a single pole switch with a center off position and put a wire from the center of this switch to pin 16, make sure it goes to the pin and not the supply side of the trace.

Take one side of the switch and locate a solid 8 volt source. This 8 volts can be located at the 8 volt regulator. Take the other side of the switch and put this to a ground, any I.F. can will do. By putting this switch up or down will cause the radio to go up or down by one channel (10KHz) There are 3 channels that will go up and 2 channels that will go down. If the voltage on the pin is already at 8 volts, then the switch needs to bring that pin down to ground to make a difference. This also is the case if the pin is at ground, then it needs to go to 8 volts to have any effect.

For the most part pin 16 will alternate between 8 volts and zero volts as you go from one channel to the other. There are some cases where it won't because the frequencies don't always go in order. Channel 23 is higher in frequency than channel 24 and 25. When 40 channels was introduced in 1977 there was a 2 channel skip between channel 22 and channel 23.

Channel 23 was used as a dual sideband suppressed carrier at a 25 watt peak power for remote control for industrial applications. By time this Class "C" operation was eliminated by 1977, channels 24 and 25 were place within this 20KHz band-guard. So technically the order of the channels in frequency is channel 22, 24, 25, 23, and then 26.

Good luck and don't blow it up If you have any questions PM me.

Respectfully,

[Lost Sheep]

Reddog, that is a great question! A 10-K switch does just what you said...it moves you up one channel (10 kilohertz).

BUT...the reason people want 10-k switches is this. Within our 40 channel CB allotment there are 5 "hidden channels", commonly referred to as "A" channels.

These "A" channels are in between channels 3 and 4, 7 and 8, 11 and 12, 15 and 16, and also 19 and 20. They are allotted for R/C use. In other words, you

cant get to them by just changing channels with your knob. You must have a "10-Khz" switch to reach them. Basically, for example, if you had a 10-K bump "up" switch you would go to

channel 19 and flip the 10-K switch. Doing this would take you to the "A" channel between 19 and 20. Another example....You would go to channel 3,

flip the 10-K switch and you would be between ch 3 and 4. This ONLY WORKS with the channels I mentioned earlier.

It is a REALLY COOL MOD that can give you a good hiding spot to go talk trash about your fellow CBers without them being able to find you and listen in. LOL.

Hope this answered your question. Have a great day!!

[015reddog]

Reddog, that is a great question! A 10-K switch does just what you said...it moves you up one channel (10 kilohertz).

BUT...the reason people want 10-k switches is this. Within our 40 channel CB allotment there are 5 "hidden channels", commonly referred to as "A" channels.

These "A" channels are in between channels 3 and 4, 7 and 8, 11 and 12, 15 and 16, and also 19 and 20. They are allotted for R/C use. In other words, you

cant get to them by just changing channels with your knob. You must have a "10-Khz" switch to reach them. Basically, for example, if you had a 10-K bump "up" switch you would go to

channel 19 and flip the 10-K switch. Doing this would take you to the "A" channel between 19 and 20. Another example....You would go to channel 3,

flip the 10-K switch and you would be between ch 3 and 4. This ONLY WORKS with the channels I mentioned earlier.

It is a REALLY COOL MOD that can give you a good hiding spot to go talk trash about your fellow CBers without them being able to find you and listen in. LOL.

Hope this answered your question. Have a great day!!

Hello LS,

Man, I guess you learn something new every day. Ahhh, ok, I get the novelty of that. I already have those frequencies on my radios, so I never had a need to know about that mod. I have a 2950DX and several of the President HR series radios. That is a really cool deal. Thank you for taking the time to explain the concept to me. Very much appreciated. You are a gentleman and a scholar. Take care and be well sir.

Sincerely,
REd

[bronco]

Hi bronco

Locate pin 16 on the PLL. This is the least significant bit on the binary count for the PLL. Cut the trace going to pin 16 and place 5.6 K ohm resistor across this cut. Take a single pole switch with a center off position and put a wire from the center of this switch to pin 16, make sure it goes to the pin and not the supply side of the trace.

Take one side of the switch and locate a solid 8 volt source. This 8 volts can be located at the 8 volt regulator. Take the other side of the switch and put this to a ground, any I.F. can will do. By putting this switch up or down will cause the radio to go up or down by one channel (10KHz) There are 3 channels that will go up and 2 channels that will go down. If the voltage on the pin is already at 8 volts, then the switch needs to bring that pin down to ground to make a difference. This also is the case if the pin is at ground, then it needs to go to 8 volts to have any effect.

For the most part pin 16 will alternate between 8 volts and zero volts as you go from one channel to the other. There are some cases where it won't because the frequencies don't always go in order. Channel 23 is higher in frequency than channel 24 and 25. When 40 channels was introduced in 1977 there was a 2 channel skip between channel 22 and channel 23.

Channel 23 was used as a dual sideband suppressed carrier at a 25 watt peak power for remote control for industrial applications. By time this Class "C" operation was eliminated by 1977, channels 24 and 25 were place within this 20KHz band-guard. So technically the order of the channels in frequency is channel 22, 24, 25, 23, and then 26.

Good luck and don't blow it up If you have any questions PM me.

Respectfully,

thanks cbdoctor