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Hi Dick and list,
Hi Dick and list,
If you do a youtube search on "w2vw larcan" you can see a really bad video of a lo-lo module under test on my bench. Pause it to read metering. There are two power output meters, one B&W dummy load with built-in meter and one Agilent. Panel meters floating in free air as mentioned may not be completely accurate but it gives an idea of what to expect.
frequency of test is 53.999 mhz, module unmodified.
Sorry for the crummy quality but there was no room to swing a camera and I took something like 42 videos of modules under test.
73,
Dave W2VW
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Hi Richard, if your seeing such low powers out of the amp it would suggest the combiners are still too high in freq. I saw a similar thing with mine, max power for me was 300 w. Then did the changes outlined by Dave k1whs in his article and things improved greatly for me. When the output stages are too high in frequency a larcan amp is a dog of a thing, once modified they Sing a sweet tune.
Peter, vk5pj.
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Hi Dick and list,
If you do a youtube search on "w2vw larcan" you can see a really bad video of a lo-lo module under test on my bench. Pause it to read metering. There are two power output meters, one B&W dummy load with built-in meter and one Agilent. Panel meters floating in free air as mentioned may not be completely accurate but it gives an idea of what to expect.
frequency of test is 53.999 mhz, module unmodified.
Sorry for the crummy quality but there was no room to swing a camera and I took something like 42 videos of modules under test.
73,
Dave W2VW
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I have the original boxes for those amps if it helps...
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Jeff DePolo
Broadcast Sciences LLC
Sent from mobile device; please excuse brevity and misspellings.
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