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I've built antennas like this one: http://www.angelfire.com/electronic2/qrp/unun.html

Just replace the T130-2 core with a more appropriate FT140-61 ferrite. You should be able to receive from 1 MHz to 108 MHz with this antenna. TX will be limited to 40 to 10 (maybe 6) Meters with a tuner.

If you have an antenna analyzer you can plot the SWR curve and get an approximate idea what the antenna's performance is for TX. As far as receiving it should work like gang-busters.

Just be aware that the bands have been poor the last couple of days due to very low solar activity. 40 Meters has had extreme QSB, and poor performance on 15 to 6 Meters (exceptions have been sporatic E openings on 10 and 6). It is possible your antenna is working just fine bar these conditions.

<blockquote data-quote="KC9Q" data-source="post: 375930" data-attributes="member: 23691">I&#039;ve built antennas like this one:&nbsp; <a href="http://www.angelfire.com/electronic2/qrp/unun.html" target="_blank">http://www.angelfire.com/electronic2/qrp/unun.html</a>&nbsp;Just replace the T130-2 core with a more appropriate FT140-61 ferrite.&nbsp; You should be able to receive from 1 MHz to 108 MHz with this antenna.&nbsp; TX will be limited to 40 to 10 (maybe 6) Meters with a tuner.&nbsp;If you have an antenna analyzer you can plot the SWR curve and get an approximate idea what the antenna&#039;s performance is for TX.&nbsp; As far as receiving it should work like gang-busters.&nbsp;Just be aware that the bands have been poor the last couple of days due to very low solar activity.&nbsp; 40 Meters has had extreme QSB, and poor performance on 15 to 6 Meters (exceptions have been sporatic E openings on 10 and 6).&nbsp; It is possible your antenna is working just fine bar these conditions.</blockquote>

[QUOTE="KC9Q, post: 375930, member: 23691"] I've built antennas like this one: [URL]http://www.angelfire.com/electronic2/qrp/unun.html[/URL] Just replace the T130-2 core with a more appropriate FT140-61 ferrite. You should be able to receive from 1 MHz to 108 MHz with this antenna. TX will be limited to 40 to 10 (maybe 6) Meters with a tuner. If you have an antenna analyzer you can plot the SWR curve and get an approximate idea what the antenna's performance is for TX. As far as receiving it should work like gang-busters. Just be aware that the bands have been poor the last couple of days due to very low solar activity. 40 Meters has had extreme QSB, and poor performance on 15 to 6 Meters (exceptions have been sporatic E openings on 10 and 6). It is possible your antenna is working just fine bar these conditions. [/QUOTE]

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