Post Au7OLYdUNw3c2IH5N2 by profdc9@mastodon.social
 (DIR) More posts by profdc9@mastodon.social
 (DIR) Post #Au6EUr4o01SF8Qt0t6 by tk@bbs.kawa-kun.com
       2025-05-14T23:11:01.103762Z
       
       2 likes, 0 repeats
       
       Finally got the T130-0 toroid transformer put together and things are looking better for the 6m band.  The SWR remains under 3 with a ~50Ω resistor load. :blobfoxthumbsup: #AmateurRadio #HamRadio
       
 (DIR) Post #Au6EhkR6032KIwSb3o by janusfox@animal.business
       2025-05-14T23:13:01Z
       
       1 likes, 0 repeats
       
       @tk I've always loved this RF stuff. It's always just like magic.
       
 (DIR) Post #Au6KBJbIpxWdXC9WMK by pounce@nyan.network
       2025-05-15T00:13:08.136292Z
       
       1 likes, 0 repeats
       
       @tk ooh this book looks cool
       
 (DIR) Post #Au6OtXbmW9J5XLijVw by purple@nya.social
       2025-05-15T01:07:18.159Z
       
       1 likes, 0 repeats
       
       @tk@bbs.kawa-kun.com another good strategy is to scan the repeater output sub-bands when checking to see if 6m is open. also https://vhf.dxview.org/
       
 (DIR) Post #Au6QSd0MXsM0MaVqyW by purple@nya.social
       2025-05-15T01:20:17.964Z
       
       1 likes, 0 repeats
       
       @tk@bbs.kawa-kun.com oh they have a HF one that specifically includes 50mhz.
       
 (DIR) Post #Au7OLYdUNw3c2IH5N2 by profdc9@mastodon.social
       2025-05-15T10:24:23Z
       
       1 likes, 0 repeats
       
       @tk Is this a 4:1 Guanella balun (50 ohm side parallel windings, 200 ohm side in series)?  Winding the two sets of turns couples their flux together, and the balun action is adversely affected.   Each of turns should be on a separate toroid.  Also, a 43 or 61 mix is generally used for transformers to get the maximum impedance.
       
 (DIR) Post #Au7rqOyFGdpFhw2ivI by tk@bbs.kawa-kun.com
       2025-05-15T18:06:37.706994Z
       
       0 likes, 0 repeats
       
       Ordered some more toroids now that I know what I'm doing. :blobfoxgooglymlem: