WB2LCW
| Joined: | Sat, Apr 4th 1998, 00:00 | Roles: | N/A | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
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| Testing RF Choke self resonance with a non-MFJ-259 analyzer! | Oct 18th 2012, 16:54 | 2 | 8,010 | on 19/10/12 |
Latest Posts
| Topic | Author | Posted On |
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| Testing RF Choke self resonance with a non-MFJ-259 analyzer! | WB2LCW | on 18/10/12 |
| I wanted to check some Radio Shack RF Chokes for self resonance! I do not have a MFJ-259B analyzer. But I do have a MFJ-109. I made a short coax cable with a 50 ohm resistor in series with the aligator clip on the center conductor! i have a short lead on the shield with another aligator clip. When I test a choke I do see a abrupt drop in SWR, at certain frequencies! I am assuming that these frequency points are where the impedance of the choke has dropped considerably are the frequencies I should avoid if I am to use this choke? Is my method correct? 73 mike |
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