schematics modern walkie talkies ????

On Thu, 4 Dec 2008 19:04:56 +0100, "Marc" put finger to keyboard and composed:

You can get circuit diagrams, service manuals, internal/external photos for various devices from the FCC web site:

You can also get technical information from Radioshack's support site:

For example, these are the available documents in the Radio Communications -> CB Radios -> Citizens Band Walkie-Talkies category:

Notice that the catalogue numbers all begin with "21-". This is Radioshacks's old numbering system. New numbers have a 3-digit prefix, in this case "210-".

Now go to the FCC web site and plug in "Radioshack" in the "Applicant Name" box and "210" in the "Product Code" box.

You will get 38 hits.

Here is one of them:

'AAO2101614'

Amongst the results is a list of documents including manual, circuit diagram, block diagram, photos, and technical description.

This is a list of Radioshack's tech docs on their own support site:

Radioshack have lodged hundreds, if not thousands of documents with the FCC. I have downloaded dozens of circuits for remote controlled vehicles, for example.

- Franc Zabkar

--
Please remove one \'i\' from my address when replying by email.

Not sure how modern those things are. But yes the "modern" units are all LSI and PLL with some discrete components.

Try searching for brand names like Uniden, Cobra, Radio Shack, Midland, on Google.

Thanks but what I'm actually looking for are schematics etc. for self-made (home-made) transceivers. Yes, indeed, I can use the industrial ones. Thanks.

'AAO2101614'

Greetings Marc & others..

Regarding: | Thanks but what I'm actually looking for are schematics etc. for self-made | (home-made) transceivers. Yes, indeed, I can use the industrial ones. | Thanks.

Consider doing some investigating of "FCC Type Acceptance" first relative to the above...

Here's a clue, you won't find a "kit" for such *complete*

11-meter hand-held transceivers. This has and continues to be one of the many problems on the 11-meter band. It was never intended to be used in this manner. Furthermore, your considering a band and a *mode* of operation that is quite noisy depending on atmospheric conditions and where we are in our 11-year sun cycle. Noisy from the perspective of all the other stations transmitting on top of each other - heterodynes. Since the service is 'channelized' this is (unfortunately) typical.

A better consideration for portable (licensed & non-licensed) service is GMRS/FRS radios. Consider,

Nearly any of your local electronics stores, including many department retail stores will carry FRS radios. Relative to all the effort, expense and time put into the 11-meter and AM mode, at least consider UHF and narrow band FM (NBFM) as a better all around alternative. The GMRS radios have the ability to operate through NBFM repeaters [typically] increasing your range significantly.

Consider the alternatives..

Cheers, Mr. Mentor

| >>Hi all, | >>I'm looking for schematics and PCB layouts of modern CB walkie talkies. I | >>assume that modern transceivers are made with ICs instead of discrete | >>components. | >>Does anyone know a place (website?) where I can get such schematics? | >>

| >>Thanks, | >>Marc | >

| > You can get circuit diagrams, service manuals, internal/external | > photos for various devices from the FCC web site: | >

| >

| > You can also get technical information from Radioshack's support site: | >

| >

| > For example, these are the available documents in the Radio | > Communications -> CB Radios -> Citizens Band Walkie-Talkies category: | >

| >

| > Notice that the catalogue numbers all begin with "21-". This is | > Radioshacks's old numbering system. New numbers have a

3-digit prefix, | > in this case "210-". | >

| > Now go to the FCC web site and plug in "Radioshack" in the "Applicant | > Name" box and "210" in the "Product Code" box. | >

| > You will get 38 hits. | >

| > Here is one of them: | >

'AAO2101614' | >

| > Amongst the results is a list of documents including manual, circuit | > diagram, block diagram, photos, and technical description. | >

| > This is a list of Radioshack's tech docs on their own support site: | >

| >

| > Radioshack have lodged hundreds, if not thousands of documents with | > the FCC. I have downloaded dozens of circuits for remote controlled | > vehicles, for example. | >

| > - Franc Zabkar | > -- | > Please remove one 'i' from my address when replying by email. |