Problem: I am using an FT1000mp and have a
Yaesu SP8 speaker. Here's the problem. When I pull the headphone plug out of the
MP, there is no sound coming out of the SP8. Not EVERY time, but most of the
time. But if I turn the audio gain on the MP, it pops back to life, way too
loud. I can then turn the audio gain on the MP back down to a normal level. And
sometimes, the sound will quit if I bump the desk. Tapping the SP8 case will
'sometimes' bring it back. But turning the AF gain on the MP works EVERY time.
Sort of like a circuit is tuned too close. Changing the settings of the SP8
filtering does cause changes in the filtering but does not effect the muted
audio until gain reaches some threshold situation.
I've checked all jacks and wiring for cold solder joints. The SP8 is connected
to the SPEAKER jack on the back of the MP of course and is disconnected when
using headphones. So before I try and bypass the audio filter circuit, can
anyone make a suggestion.
Solution: The 1/8 inch front panel headphone
jack on my 1997 vintage MP also developed this symptom a while back. The jack
includes contacts that serve to mute the external speaker connection when a
headphone plug is inserted. My quick fix was to switch to the 1/4 inch headphone
jack which did not have this symptom. A bit of DeOxit applied to the 1/8 inch
jack contacts later took care of the issue with the 1/8 inch headphone jack.
Solution 2:Try cleaning the speaker plug
with a contact cleaner or alcohol and then coat the contact conditioner if you
have it. I occasionally have the problem with the headphone plug. Art W2NRA
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