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   Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 08:11:23 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

   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

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     janusfox 🍅 (janusfox@animal.business)'s status on Thursday, 15-May-2025 08:13:39 JST janusfox 🍅

     in reply to

     @tk I've always loved this RF stuff. It's always just like magic.

     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 08:14:53 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to

     • janusfox 🍅

     @janusfox It really is.

     If you want to have your mind blown, check out small loop antennas and this thread. :blobfoxgoogly:

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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 08:52:26 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to
     Fun fact: the -0 formulation is just phenolic resin (basically plastic). :blobfoxgooglymlem:
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     pounce (pounce@nyan.network)'s status on Thursday, 15-May-2025 09:15:04 JST pounce

     in reply to
     @tk ooh this book looks cool
     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 09:48:00 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to

     Still can't hear any of the 6m beacons, though. :blobfoxsad:

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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 09:54:25 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to
     Though unlike before, I'm actually getting some signal (really noise) in the 6m band. :blobfoxgoogly:
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     purple 👊✊💨 (purple@nya.social)'s status on Thursday, 15-May-2025 10:07:53 JST purple 👊✊💨

     in reply to

     @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/

     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.
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     purple 👊✊💨 (purple@nya.social)'s status on Thursday, 15-May-2025 10:25:28 JST purple 👊✊💨

     in reply to

     @tk@bbs.kawa-kun.com oh they have a HF one that specifically includes 50mhz.

     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 11:52:38 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to
     Going to spend some time reading The Antenna Book's chapter on baluns before building anymore. I'm tired of flying blind! :blobfoxgooglymlem:
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     Daniel Marks (profdc9@mastodon.social)'s status on Thursday, 15-May-2025 21:36:30 JST Daniel Marks

     in reply to

     @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.

     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 21:37:21 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to

     • Daniel Marks
     @profdc9 Thanks. I did try type 43 first, but that didn't work very well for 6m. :blobfoxsad:
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Thursday, 15-May-2025 23:38:13 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to

     • Daniel Marks
     @profdc9 Oh, and this is just a basic 1:1 current balun.
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Friday, 16-May-2025 00:22:14 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to
     RETVRN TO PHYSICAL MEDIA (books).
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Friday, 16-May-2025 03:07:00 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to
     Ordered some more toroids now that I know what I'm doing. :blobfoxgooglymlem:
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Friday, 16-May-2025 03:09:16 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to
     Pretty sure this equation is correct because it gets values very close to everything I've tried on toroids.info .
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     Stampeding Longhorn :budgie: (stampedinglonghorn@social.linux.pizza)'s status on Saturday, 17-May-2025 12:19:06 JST Stampeding Longhorn :budgie:

     in reply to

     @tk It's amazing how easy and quick it is to look something up in a reference book rather than googling it.

     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.
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     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Saturday, 17-May-2025 12:19:48 JST Doughnut Lollipop 【記録係】:blobfoxgooglymlem:

     in reply to

     • Stampeding Longhorn :budgie:
     @StampedingLonghorn And physical books are easier to flip through than e-readers.
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     Stampeding Longhorn :budgie: (stampedinglonghorn@social.linux.pizza)'s status on Saturday, 17-May-2025 13:16:00 JST Stampeding Longhorn :budgie:

     in reply to

     @tk Yes, I can flip thru 100 pages in the time it takes an e-ink screen to flash a page.

     Doughnut Lollipop 【記録係】:blobfoxgooglymlem: likes this.