Is there a reason why people think it¡¯s RF pickup on the coax line and not on the audio line?
Wouldn¡¯t the audio line be a more direct and damaging route to the chip? ?
My thought is that feedback or not, the RF is going out the antenna and then the audio line is acting as an antenna and is picking up the RF and burning out the chip because we know the chip operates in bridge mode and therefore the leads are not grounded¡
73,
Tom
Sent by phone, please forgive my brevity and poor typing.
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On Jan 8, 2024, at 6:29?PM, Scott N4AAJ <scottfusilier@...> wrote:
?@Larry N0SA,
I also only work CW and had headphones plugged into the accessories audio cable that comes with the rig - not the speaker mic as it's headphone output plug is mono (the accessoriescable.is stereo). I normally run 5 watts CW when operating.
When mine failed I was running a tone (set to 30 in the menu) into an Elecraft T1 on 28mhz tuning an end fed random wire. It was a normal tuning cycle and it did complete. I had the headphones in when th audio stopped part way through the tune cycle.
When I get the rig back I plan to run a choke on the coax going forward.
As I stated in another post, the rig see.s to be sensitive to RF on the coax at 15m, 12m, 10m, and 6m. I've had it actually shutdown on me while trying to tune at low power on these bands. None of the other bands seem to have the same affect on the 599.
Hope this helps and that you never experience this issue.
73 de N4AAJ
Scott Fusilier
