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TS-940 strange problem
My TS-940 goes to a state of very little gain. For instance the noise
level on 40 meters drops and the received signals are low in amplitude. If I make a noise click with my rotator, (just push the brake lever button so I create a noise spike) the receiver gain immediately comes back up. What in the world could be causing this? Don Campbell W6QEY |
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My TS-940 goes to a state of very little gain. For instance the noise
level on 40 meters drops and the received signals are low in amplitude. If I make a noise click with my rotator, (just push the brake lever button so I create a noise spike) the receiver gain immediately comes back up Don- This reminds me of a problem that was reported with the TS-430. According to the report, there is a jack on the back of the radio used for connecting a transverter. It has a built-in switch with contacts that open and/or close when the transverter is plugged in. The trouble is that the jack's switch contacts never get exercised if you don't use a transverter. The contacting surfaces get oxidized or corroded ever so slightly, resulting in exactly the problem you describe. The transverter jack may not be common, but there was probably a mate included along with things like fuses, when the radio was new. If you still have it or can get one, try plugging it in and removing it several times, and see if that doesn't help your problem by cleaning the jack's switch contacts. 73, Fred, K4DII |
#5
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My TS-940 goes to a state of very little gain. For instance the noise
level on 40 meters drops and the received signals are low in amplitude. If I make a noise click with my rotator, (just push the brake lever button so I create a noise spike) the receiver gain immediately comes back up Don- This reminds me of a problem that was reported with the TS-430. According to the report, there is a jack on the back of the radio used for connecting a transverter. It has a built-in switch with contacts that open and/or close when the transverter is plugged in. The trouble is that the jack's switch contacts never get exercised if you don't use a transverter. The contacting surfaces get oxidized or corroded ever so slightly, resulting in exactly the problem you describe. The transverter jack may not be common, but there was probably a mate included along with things like fuses, when the radio was new. If you still have it or can get one, try plugging it in and removing it several times, and see if that doesn't help your problem by cleaning the jack's switch contacts. 73, Fred, K4DII |
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