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Author Topic: RFI a constant in HF side of the station  (Read 2272 times)
KG6YSF
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Posts: 91




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« on: March 23, 2014, 01:41:49 PM »

Well I have posted on here several times about issues in my old Drake TR7 and have gotten great response. So I am asking yet again. I believe that I need to set up a station ground. I have been getting consistent reports of a "motor boat type sound" and or reports of "FMing" on my signal. I have some issues in the Drake that need to be addressed by a specialist, I am in contact with wb4hfn about giving it a "full spa vacation." Grin I have been honored to have the opportunity to buy a friends' fathers' Kenwood TS940SAT. It is pristine! Unfortunately Toms' father and mother both became silent keys in Dec and then Jan. I had hoped that things would improve with the newer radio however it hasn't. So any input and or helpful suggestions would be very appreciated. I really want Tom to hear a strong signal when we chat. He could not keep the radio as he is blind and it has too many buttons and knobs. It took us about 4 months for him to learn the FT 897 he has. It makes me a little sad and kinda proud that he gave me first shot at it. I want him to know when he hears the Kenwood that can he not only have a good memory but know that it went to a good home. He really emphasized to me that he wanted it to be used.   
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"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
KG6YSF
Member

Posts: 91




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« Reply #1 on: March 23, 2014, 10:39:13 PM »

I was able to make a QSO with another ham who has the same mic and radio and he was able to help me get rid of a pretty fair amount of the rfi by disconnecting the Kenwood MC60 mic from the microphone's base preamp and run it strait to the radio. Said that it made a huge difference. But still some noise on tx. It dose seem that the bands have been a bit noisy yesterday and today during the evening hours. I have had a couple people tell me that some of the noise is probably the solar controller, my station is on solar.
Hope the added info helps some Elmer help me and maybe others that may read this post.

Thanks again
Jason kg6ysf
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"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
K3LRH
Member

Posts: 60




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« Reply #2 on: March 24, 2014, 05:47:17 AM »

......have you tried the stock mic?   Also, you can try adding ferrites on the mic cord right where it attaches to the rig.  That MC60 mic has a history of improper wiring too. Maybe Google it.

73
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KG6YSF
Member

Posts: 91




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« Reply #3 on: March 24, 2014, 01:38:09 PM »

Well you are right on! I disconnected the mic from the base in order to bypass the pre-amp that is built into the base of the MC60. After disconnecting the base from mic I got much, much better reports. I am going to ground the station today and see if that doesn't make things any better. Thanks for the tip I really do appreciate it.
Logged

"Rangers Lead The Way!"  "Sua Sponte"   "Litalis Velox Silens"
When all else fails ham radio is there!
FT2900, FT8900, VX6, Ft60, TS940SAT, Drake TR7, MFJ 969
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