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   Home   Help Search  
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Author Topic: Kenwood TS-520 Help  (Read 1785 times)
KU4BY
Member

Posts: 3




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« on: December 06, 2010, 09:09:33 PM »

I have a Kenwood Ts-520 that recently lost it's receive on all bands. WWV still comes in when the button is pushed. Looking for the first IF, I noticed all I saw was the HET OSC frequency. From this point I injected a signal into the back of the radio and started tracing it using the line level diagram @ 14.157MHz. At test point B, which is the return from the Antenna Coil Board where it meets up with a trap,  I saw a decrease in signal instead of the 13db of gain that I was supposed to be seeing. It appears that this is the point where the signal enters the Antenna Coil Board. I did find R31 burned but still reading 56 Ohms. I replaced it. It's on the input of Q5, or the !st RF Amp.

It's going to take some time for me to get the Antenna Coil board out of the transceiver because of they way that it is soldered to the chassis so I was wondering if anyone in the forum could maybe offer some words of wisdom of something more simple to check to verify that it is the coil board. Perhaps I am missing something? Or maybe I'm just heading in the wrong direction?

Any help would be greatly appreciated!

Thanks in Advance!

Steve
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KE4DRN
Member

Posts: 3746




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« Reply #1 on: December 07, 2010, 04:59:04 PM »

hi Steve,

join other kenwood ts-5xx and 8xx fans here
they can help pinpoint the problem and recommend a fix.

while you are inside the radio be sure to check the
band switch shaft coupler in the final cage.
these can crack over time and result in misalignment of
the band switch wafer switches.

** please use caution when inside the finals cage **

http://groups.yahoo.com/group/TS-520_820_530_830/

73 james
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KU4BY
Member

Posts: 3




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« Reply #2 on: December 07, 2010, 06:11:07 PM »

Thanks James,

I just submitted the request to join.

Steve KU4BY
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