Maxtrac UHF D34 audio whine above 465 MHz transmit

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radiocat37
Posts: 210
Joined: Mon Sep 22, 2003 9:59 am

Maxtrac UHF D34 audio whine above 465 MHz transmit

Post by radiocat37 »

I have a D34MJA73A5AK UHF 449-470 Maxtrac 2-ch. The thing works great except on transmit above 465 (or thereabouts) it has a whine in the audio. I have low SWR, 50A power supply, great receive audio across the UHF range, but I programmed it for 468 TX and got a noise I have never heard before; sounds like a high pitched shrill. Any thoughts??? :o
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Max-trac
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Post by Max-trac »

As you get near the range of the VCO, it will start to "ring".
High pitched single tone, I would not describe it as a "whine" which would be dual tone.
Try adjusting the TX VCO a tad.
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