Ed,
Were those good quality, name brand batteries? I have heard similar
popping noises from audio amplifiers caused by batteries with high
series resistance. I have not observed that problem with the KX3, so I
am just suggesting that the problem may have been the batteries.
73,
Don W3FPR
On 5/10/2014 7:55 PM, Edward R Cole wrote:
While on my trip in the lower-48 I installed batteries in my KX3 for
the first time (run it off 13.5v PS in the shack).
I noted that there was a regular popping noise at a regular beat about
once per second. I checked battery voltage and saw that is was below
12v and dropping slowly. I used eight AA batteries which all tested
at 1.53v before installation - brand new out of the package. 8x1.53 =
12.24v but there is loading so voltage started at about 11.9v. I
noted current was running about 250ma with radio in SSB and normal
volume level. I guess the radio draws pretty hard in receive.
I removed the batteries and radio runs normal with 13.5vdc applied. I
guess using 2.2v lithium or NiHD batteries would work better.
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