Hello guys im aligning a cobra 29ltd using the alignment procedure,now im using my laptop to send tone cannot hear it on the radio any help would be appreciated also i tested all my cables they work well. im assuming i might be missing something.
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Cobra 29ltd classic
- Thread starter kaos513
- Start date
I tried sending tone through speaker jack and antenna jack i dont hear anything when i use my laptop to send tone.
Why are you sending a tone thru the speaker or antenna jack?
What are you using as alignment info?
http://www.cbtricks.com/radios/cobra/29ltd_29ltd_st_29wx_st/graphics/cobra_29ltd_sm.pdf
What are you using as alignment info?
http://www.cbtricks.com/radios/cobra/29ltd_29ltd_st_29wx_st/graphics/cobra_29ltd_sm.pdf
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Think you should send your radio to a shop for a tune-up and not do it yourself. Kinda obvious that you are without a clue as to what you are trying to do . . .
Kaos you can use the laptop with a proper tone downloaded to it just to help with TX align. you need to play with a old junk radio to see how all of this works and do a lot of reading. the service manual tells you what to do if you would read it and pay attention to what it is telling you to inject into a certain section.the main basic items you will need is a good commercial freq counter 8 diget at least., a 100mhz scope,a tone generator and a signal generator. this is the basic. forgot you need a good watt meter and swr mete and a good volt ohm meter, plus a good soldering gun.
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I agree with Robb's suggestion, but for the sake of clarity; I believe you're trying to play the 1 kilohertz tone through your speakers without any physical connection to the radio, you'll have to place the (keyed) microphone close to it.
If you are trying to generate any other kind of signal using your computer, other peripherals/software will be involved, you can use the speaker method in a pinch to test TX modulation adjust, maybe a meter adjust, you could "tune" the TX output some and that's about it.
But for actual transceiver alignments you're going to need a real signal generator(AF & RF), 'scope, 8 digit frequency counter and more.. From reading your post it sounds like you're trying to do a receive alignment and you're not using the right tool or method.
You could make a small signal gen. out of an old Cobra 25 or something; if you need a link for that process then let me know.
EDIT: Just saw sonoma's post
73
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