Basically, does it work? Saw a you-tube video that shows it making a profound difference. Yet others say all it does is increase background noise.
Anyone care to comment.
Ed
KL-203P Pre Amp Function
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bmwed
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sonoma
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if you have a S2 noise level on your radio and you turn on the pre amp you now have a 6 or 7 noise level on your radio. it just amplifies what you are hearing. the only time a preamp has worked for me is if it is quiet out and some one is just barely moving your needle and you can just barely hear them it will bring them in a little louder plus any back ground noise that is out there.. some people like them and some do not. I have had them work for me on a low signal and hurt also by bringing in the other hash noise.
it just brings in every thing out there at the time and lots of times it makes it harder to hear a low signal.you will not go wrong with that little amp. just buy one and run it then you will see 1st hand how it works. the output is awesome on the little amp.
one other thing is if you should blow the mosfets in it you can drop 4 of the 13n10 mosfets in it and get even more wattage out of it. mosfets are cheap. the builder use to use RM3 mosfets at build and not sure what they use now. the 13n10's will give you about 25 more watts on AM and about 50 more on SSB
it just brings in every thing out there at the time and lots of times it makes it harder to hear a low signal.you will not go wrong with that little amp. just buy one and run it then you will see 1st hand how it works. the output is awesome on the little amp.
one other thing is if you should blow the mosfets in it you can drop 4 of the 13n10 mosfets in it and get even more wattage out of it. mosfets are cheap. the builder use to use RM3 mosfets at build and not sure what they use now. the 13n10's will give you about 25 more watts on AM and about 50 more on SSB
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bmwed
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Thanks for the reply, and useful info regarding the mosfets. I presume I would need extra cooling. I understand that these units can run fairly hot if the input wattage is high.
Ed
Ed
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milkman21218
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They will die if you feed them with more than 2 watt DK. 3/4-1 watt is best. I've run mine for over 13 years.
Central Maryland
73
73
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sonoma
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they will run hot and burn up the mosfets in the radio unless you have the radio turned down to run the little amp. milkman brought that up which is correct. I have one I have used since about 2001 and it is not the P version. it does not have the preamp in it. if you run over 2 watts in it you take a chance of popping the mosfets in it. drop your radio to about 1 to 1/12 watts and it will run forever. just do not over drive it.bmwed wrote:Thanks for the reply, and useful info regarding the mosfets. I presume I would need extra cooling. I understand that these units can run fairly hot if the input wattage is high.
Ed
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MDYoungblood
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I believe milkman made it pretty clear, whatever the noise level is on your radio it will increase it as well as the receiving signal. If your trying to clean up the receiving signal then you will need to find a noise reduction filter. There are several ham radio speakers that work well doing this.
3's
Greg
3's
Greg
