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Radio
Broadcast Technical Consulting and Sales
10032 Island Drive, Brainerd, MN
56401
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Radio
Broadcast Technical Consulting and Sales |
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Technical Tips from Mark W. Persons |
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Harris FM-20K Transmitter work |
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March 4, 2008: Here is your intrepid engineer Mark Persons adjusting the second-harmonic trap on the output of a Harris FM-20K Transmitter at KMSU Radio in Mankato, MN. The exact length of this trap gives the best harmonic suppression. An adjustment needed to be made as a part of tuning the transmitter to a new frequency. |
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Marv Olson was working on this project at the same time. He is wearing gloves and just got done replacing an air screen above the power amplifier cavity on the top of the transmittter. The screen is 1/4" hardware cloth. It is not uncommon for these screens to be accidentally broken or burned from high RF inside the cavity. Best to check the screen on a regular basis to make sure it is fully intact. |
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The stories go on and on.
Stop in again sometime. I'll leave the soldering iron on for you.
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page last edited 03/23/2008
