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Message |
    
Bluegrass
Member
Username: Bluegrass
Post Number: 99
Registered: 12-2004
| | Posted on Monday, January 17, 2005 - 5:28 am: | 
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is it possible to modify the klv-400 base amplifier so it will put out ssb power on am.the reason i'm asking is the 400 is the biggest amp i can afford and from what i've heard it only puts out about 80 watts on am.so is there anyway i could ring any more power out of it? |
Gregra77
New member
Username: Gregra77
Post Number: 1
Registered: 2-2004
| | Posted on Monday, January 17, 2005 - 10:18 am: |
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I've got a KLV 400 base amp, It puts out 175 watts on low an 250 watts on high am an 350 to 400 watts on ssb.So who ever told you 80 watts on am doesn't know what their talking about. |
That ELCO Guy (Unregistered Guest)
Unregistered guest
| | Posted on Monday, January 17, 2005 - 6:10 pm: |
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Re BG
Well first off lets state for the record that the output of any amplifier is the product of two major components. The amount of power that is applied to the finals and the amount of drive that is applied to the control circuits that allow that power to flow to the antenna. And too you have to factor in the efficiency rating of the final itself at some point.
SO if you want to get more out of an amp you have to either use a more efficient final. Apply more power to the final itself (provided the tube can take it of course). Or just provide MORE drive to the final so that the control can allow more of the power to flow to the antenna.
HOWEVER remember that overdrive while it will provide a margin of extra power output will also distort the signal.
That ELCO Guy
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Racer X (Unregistered Guest)
Unregistered guest
| | Posted on Monday, January 17, 2005 - 8:13 pm: |
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I agree with That ELCO Guy but he didn't address mode of operation. Amplifiers are rated at different outputs for different modes because of the duty cycles of those modes. SSB puts out less average power than AM, which is why amplifiers are rated at higher output for SSB than AM. Usually the SSB rating is the maximum possible power the amplifier can reach. You can actually get the same PEP output on AM that you can on SSB, but the amplifier's devices (tubes or transistors) will get too hot and wear out prematurely. The hotter they get the faster they wear out. Follow the manufacturer's guidelines and they should last a good while. Run it at less than it's maximum output and the devices will last much longer.
So in short - no, you can't modify the amplifer to have the same output power on AM as it does on SSB. That's just how it is because of the different duty cycles of those modes. |
Bluegrass
Intermediate Member
Username: Bluegrass
Post Number: 100
Registered: 12-2004
| | Posted on Tuesday, January 18, 2005 - 10:03 am: |
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ok sence it puts out about 175-250 watts i won't need any more power. |
