Question about Magnum 257 CB Radio

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Only doing about 45 watts this is the 80 watt version s- meter not working

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What kind of meter do you have. That may be correct If it's an rms only meter that's all it will show it won't show the peak wattage. You would need a peak reading meter. If you do have a peak meter then check your swr's. If they are high then it will hurt the output of the radio. We. Dont charge to check out any radio.

Posted on May 16, 2011

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1 Answer

Can you turn the rf gain pod up for better receiving


Yes you can turn up VR pot inside to recieve max level but will cause noise to be max too. I don't rightfully remember which one does it but I'll refer you to Defcom cb radio mods for a spec sheet
or Snakedoctors cb radio mods google site. Go to these radio mods sites on Google search and type in radio model. It will tell you what Vr inside to turn up RX of RF gain. Turn up modulation and written instruction if you are handy with solder gun how to change a resistor or cap to make it more sensitive recieve. How to replace final stage and resistors to 1/2 watt size for 6 more watts output and spread coils 1/8 inch apart like a comb for 100% microphone loudness or swing output. say 3 watts to 40 watts output. More windshield wiper swing in meter makes loud voice and extends range with Power final boost. Most people prefer to keep a mobile at around 11 watts swing to 45 watts.(but on generic radio meter will show 2 to 5 watts-its not accurate just a cheap indicator you are forward swing). Even though factory says 4 watts FCC hogwash. They come tuned from Cobra with 11 watts to 14-22 watts.Cobra really peaks them babies so competition doesn't beat them out like new louder radios made by Galaxy 55. Even though law says blah blah (corporations bend it)sales pitch Galaxy very heated with Cobra on the game(rich can do what they want)Galaxy is 20 watts factory with big promise to 40 watts dual finals. So Cobra updated and said "screw it we will break the law too" Now Cobra is loud as ever and offering their own super mod versions and dual final radios with 45 to 65 watts output with ranges on SSB & USB of 1500 miles on a strong good outdoor antenna.

Feb 15, 2013 | Cobra 29 LTD CB Radio

1 Answer

How many 5 watt outside lights can you power with a 20 amp breaker?


Volts x amps= watts.
20 amp breaker x 125 volts = 2500 watts.
However, electrician use the 80% rule, so multiply 2500 x 80% = 2000 watts.
So if you have 20 amp breaker, and 12 gauge wire, and 20 amp switch, and distance is less than 150 feet, then watt load is 2000 watts or 400 5-watt bulbs.
Keep in mind that most switches are 15 amp, and not 20 amp.
Recalculate for 15 amp switch = 1875 watts x 80% = 1500 watts or 300 5-watt bulbs.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Jun 22, 2012 | Home

2 Answers

Is it possible to convert the cobra 29 wx nw st sound tracker cb to 10 meter amateur band?


No it cannot. If you want that buy a Ranger or a Galaxy.

The 29 can be altered to increase modulation and turned down in power to match it to amp for increased output of power.

Set to dead key a watt or so with a 100 watt amp it would dead key low and swing to 80 to 100 watts pep.(peak envelope power)

Mar 16, 2012 | Cobra Radio Communications

1 Answer

I have a ML121RT Low Voltage 121-Watt Power Pack with Timer hooked up with three 20 watt lights attached - going north. I want to add one more 20w llight going south. Can I attach an additional wire to...


Try it... should work
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#install
However minimum load for ML121 is 80% load rating.. so 80 watts is ok for 100 watt transformer... 60 watts is low and can cause early failure of transformer.
Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Jul 14, 2011 | Malibu Intermatic Inc. ML121RT Low...

1 Answer

Galaxy saturn tubro 100 watt power is sticking after key up.


Not sure what you mean completely. If you mean, when you key up, it keys at 100 watts and stays, then this is probably not a problem.

If it doesn't swing, it is either the watt meter you are using, or you have the power up too high, or both.

I usually key my saturn turbo around 80 watts. You have to be careful with these radios. they get hot fast and when they do, they get whacky. Make sure you have a PC fan plowing on the heat sink on the back.

The higher the dead key, the less swing you will see.

Now as for the watt meter....

There are a few types of meters out there. The 2 most common are ones that read AVG, or average watts, or PEP or Peak envelope power, which in short terms is your Peak wattage. Some meters do both.

An AVG meter will not read peak wattage, or swing. So if you meter is an AVG meter, or is set to AVG, then it will not read swing, and will show you your dead key, and that's it. Some times the needle will move a little, but it is not showing your true swing.

All in all a PEP meter is a loose representation any way, because you really cannot get an accurate reading when there is modulation. But it's close enough. You would need a spectrum analyzer to really see what you are putting out with modulation. AVG with no modulation is a more accurate reading however you cannot see swing.

Now PEP while transmitting in SSB with modulation, would be accurate. Just not AM, but like I said, its close enough and is what every one goes by.

I don't know if your Saturn turbo has been modded or peaked and tuned but, you should see a max of about 170 to 200 watts swing on that radio if its been done right. But you will need a PEP reading meter to see that.

I wouldn't run it past 80 watt dead key for long. With that radio you should really only run what you need. For instance, when I am using mine, I start at around 70--80 watts, and do a check, and if it's not strong enough I bring it up a little, until the audio sounds good to who I am talking too.

Like I said, you have to keep it from getting too hot.

Nov 04, 2010 | Radio Communications

1 Answer

DX-66V Base CB Radio: i would like to know what i can do with all the ch...


the 66 doesnt have sideband 45 watts is a hell of a lot of power how did you get 45 watts mine does about 20 watts and is loud as hell

May 18, 2010 | Galaxy Radios DX-66V Base CB Radio

3 Answers

Wat power does this radio push


Generally All CB Radios will only push 4 watts. This is only if you have a SWR of 1:1

Jul 11, 2009 | Magnum S9 Base CB Radio

1 Answer

Will the garmin edge 705 provide/ be able to produce a power watt measure during outdoor rides and what do i need to purchase to be able to get this information?


The 705 comes in multiple versions from basic that will give you heart rate to a team garmin version that has the cadence, speed, calories, etc. As for power meters the 705 is 3rd party compatible to show you watt measurements.
The following third-party ANT+Sport-enabled power meters are compatible with the Edge 705:
  • iBike
  • PowerTap
  • Quark
  • SRM

May 12, 2009 | Garmin EDGE 705

2 Answers

Peak and tune a mini magnum 30 10 meter radio


You need schematics and a good peak reading watt meter. You can do damage if you don't have eqipment/knowledge.

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