***de 9 Mexico 2 Ocean David Yesterday***
"Work active at 10m, 20m, 30m, 40m, 80m & also 2m band..all band worked at FM, SSB & PSK31 also CW modes..hpe can see u down the log & highly appreciated to work with me at the band"
"I'm worked seriously at 10m, 20m & 40m on my HF mobile station right now, please do not hesitate to answer if u hear my call, i'm always calling CQ DX during mobile"

Wednesday, January 26, 2011

Isolation

Messy wiring

RFI Choke

There are many solutions for reduce/cut Mr. Ruffy (RFI) from enter to the transceiver..at the first step, i just make turn & put Toroid Snap at the turn to make RF/humming choke..& the result i got, RFI no more coming into my rig..so, i apply same method to each connections..below are the solution can be use for RFI/humming problem :

1. add Mix #31 Ferrite cores to the Microphone cable at each end, and in the middle..

2. mic cable is wired in a Balanced configuration..

3. change the microphone cable to a good quality cable like Canare or Mogami Starquad.. Whatever brand, be sure to get the Starquad..

4. shorten the mic cable to the minimum length necessary..

5. add a .001uf cap from the #2 Pin to #1 Pin, and a .001uf cap from the #3 pin to the #1 in the XLR connectors of the mic cable for RFI bypass..


73/88 de 9M2ODY

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