Magnum s-3 well hope someone can help me. i have a magnum s-3 that when powered up goes to channel 9 when it does this there is no rx or tx..when radio warms up it will act just fine ..after it starts working as long as you dont kill the power it will work fine all day and night..thanks for any help

every day? can you add more info.. the more noise on the RX end will make the needle higher then the TX setting so if this is a noisey day and you have 3-9 s-units on the rx yes a needle will drop. without having a watt meter to see if your power is dropping when you TX is different.. add a inline watt meter and make sure you have a decent power source. and TX and see what it is showing for wattage. if it drops then check power supply first make sure its giving enough amps. then next chk swr's and radio..

it probably jumped freq. somehow. There is now manual or anything but a picture of this radio and a few tune up rv's but thats it.I have the exact same radio and it works fine If you can put it on an oscilloscope it should tell you right away what the problem is. Then try a frequency counter.

Rx is an abbreviation for receive. (Tx is transmit) There are a variety of reasons a radio will be "stuck" in Rx:
1) Another radio in the group is stuck in transmit and you cannot reply if your radio is receiving the other radios transmission.
2) Your radio is programmed for Rx only.
3) Your radio has a Tx problem such as a bad mic, or something covering the mic opening.
4) Your battery is low or bad. It takes more energy to Tx than to Rx.

Best regards.

Hi don,

Hyperscan is usually, but not the only domain of scanning receivers.

Does it affect your Tx or Rx, if not, then there is nothing wrong, but if you want it to stop scanning for an active channel, then press the scan button once to stop it.

I hope that answers your query.

Cheers,
Peter

Hi Laura,

When you see the Rx sign on the screen, it indicates that someone else is transmitting (Tx) on the channel, this is also caused by "BOOF HEADS" who like doing nothing more than dropping carriers by holding down their PTT button during a conversation, something that happens a lot on CB and without a doubt on FRS radios.

There is no problem in your radio, it's Just someone else probably dropping a carrier as per above.

Not much can be done about this problem, No License, No Joy.

The fact you can hear the other person over the screach indicates to me that I am right, and your radio is fine.

I hope this clears up your query.

Warm Regards,
Peter

Did you have someone get on channel 2 to see??? Maybe channel 2 was quiet and channel one had better receive or noise.. You never know until you check it with another radio. That is NOT a common issue at all on those radios. Better off doing that test.
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS OF CB FUN!!!

But thats how a walkie talkie works, it stays in Receive Rx mode UNTIL you press the PTT button,, then it Transmits Tx, and when released it goes back to Rx, receive?

Hello.I have a similar situation on a Magnum 257 HP operating on SSB (AM and FM works fine). If i Transmit it works fine, but when i release the Mic button (after TX), in the bottom side were the RX level should be, it appear somth like a signal level 3 to 5 (constant and continous), but i can't get any reception at all. Only if i turn the TX power level to MAXand i transmit, then it goes back to reception, but not every time. Somtime after TX i need to push the mic button 2-3 times to make it recive somthing, but this wors only if the power level is over 60-70% an i repeat, only on SSB.Can i get some help with this issue?

Depends on how it was modded? Were both the TX and RX broadbanded and tetuned?? Possibly poor work..

Hi,

D23 is the reverse protection diode and it shorting is the primary reason your fuse blew. As you posted, power was applied in reverse, hence other components would also fail. Pls check:
1. D22 - 9.1V Zener Diode
2. TR23 (2SC1096) 9 Volts regulator
3. D19 - 5.1 Zener Diode
4. IC4 (TA7222) - Audio Amp
5. TR14 (2SC2029B/10) - Finals
6. TR15 (2SC2028B/20) - Driver
7. Most capacitors over 220uF (like C123, C114 & C112)

Hope that this be of help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.