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My grant has good mod on sideband but when i transmit on am i get a squeel like sound coming in with my voice but the squeel is louder then my voice. could it be a bad shield on my hand held astic power mic?
Re: My grant has good mod on sideband but when i transmit...
If you have talk back, that most likely why you have feed back. If its on a switch, turn it off. When it was put in, it was done too loud. You can also turn down the gain on the mic.
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you will be better off taking this to a tech considering it is a ham radio also. he can set the freq and put it on a distortion meter also to find out the problem.
Did you have your radio "peaked?" If you turn a Cobra Sideband radio up to much it may be great for the AM side but can crush the Sideband side. Make sure it is on frequency too. Use a frequency counter to check. Make sure your SWR is 1-1:5 and no higher than two. You may have to take it to a tech and have them but it on a scope.
Sound Like The Modulation Amp May Be Dead.. Or a Componet in The Mod. Section....You Can Pick up The Repair Manual..@ www.samswebsite.com For about $20.00...Good Luck
i cant afford 20 dollars to fix that radio your add said free i am laid off the old grant will have to waite i am not a teck have no idea what is wrong thank you for your time sorry to bother you ihave a good ole cobra29 that i talk on now grandadmac50@ yahoo.comm
im not sure carriers are measured in pounds, but SSB is a supressed carrier mode, in SSB only one sideband is transmitted and the carrier is inserted at the other end in the receiver. In AM mode the carried and both sidebands are transmitted. with regular am there is a carried and when modulation (your voice) is added a signal appears both above and below the carrier frequency at a distance relative to the frequency of your voice. so if you have a carrier at 1000 khz and modulated it with a tone of 100 hertz the signal will contain frequencies of 900,1000, and 1100 hertz, then its changed to SSB by supressing the carrier (1000) and one sideband (1100) if you are on lower sideband and (900) if you one upper sideband, and transmits the remaining frequency.
Is the squelch off? Is there even a crackle from the speaker? Does it appear to go into transmit?
If you have a friend can listen in while you try transmitting, get him to let you know if voice can be heard, or a carrier appears (on AM). If TX OK, try sideband, if OK, look for faulty speaker/ socket/ wiring. If no audio on TX, suspect the audio amp is bad.
U mean on sideband? Frequency counter only useful on other than sideband operation. This does not mean the carrier insertion osc. is on frequency. If it needs adjustment, your voice will sound high/ low on transmit. Incoming signals will sound right after adjusting the osc.
Open the radio up and find the L22 Can/Pot. It's the one with the wire soldered on top. With both fine and coarse Claifier/Voice Locks in the 12 O'Clock positions, confirm, then listen for someone that is on the correct frequency and turn this pot (small ferrite core inside) with a small plastic preferred screwdriver, until they sound clear. Do this for USB as well except, the Can/Pot is L59. Don't adjust the VR5 (transmit) unless you need to.
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