K7PP, Checking desense on the W7ZA repeater cavity filters Ham Radio

This is another short video of tests run to confirm the sensitivity level of the W7ZA repeater belonging to the Grays Harbor Amateur Radio Club.
The repeater transmitts from Saddle Mountan near Ocean Shores Washington and was in the shop for repair of a cronic intermittent transmit problem.
This video is aimed at keeping the club members "in the loop" as to repeater status and to provide a small bit of training for those interested.

Category:

Science & Technology

Tags:

• repeater
• adjustment
• amateur radio
• desense
• radio
• amateur

[dogtagsvette]

Yes, Interesting point....could be thermal generated and could be the size of the load and it's ability to dissipate the heat.

Stay tuned as I'm putting one together for measuring radio site desense the next trip up to the site.

Thanks for your interest.

[uploadJ]

Thanks for presentation. I have noticed a difference in 'loads' generating different amounts of white noise while performing desense tests in past years too (some loads create more on-receive-channel white noise than other loads when the transmitter is keyed).

I have a 300 Watt Bird dry load, for instance, that is significantly noisier than an old Bendix 150 Watt Termaline Watt Meter for instance.

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