Jim

Avid generalist. Adventure-ish. Denver and elsewhere, Colorado, USA. #AmateurRadio #FilmPhotography W3JCE

@bud_t It's a little unsettling for sure.

@bcshort Thanks for the overview! I've been meaning to do this for a while now. QLog looks interesting: github.com/foldynl/QLog

@technodad @bud_t
I attempted a check in via VARA HF yesterday. I haven't seen myself in the check in list yet, but it looks like they might be updating it manually.

@bud_t Thanks for hosting this. I'll try to give it a shot next week.

@DK1MI Thanks!

@bud_t Same with our Denver Home Depot. It's like the entire metro area is coming out of hibernation this weekend.

@M0RVB @ei6gsb Same experience as Jeremy. I plugged a homemade 70cm ground plane into the board and it just worked.

@kentborg The folks at palomar-engineers.com/ say that their FT140-43 based 9:1 ununs can handle about 250W, so I'm pretty comfortable with 100. In application, I'll probably drive it with much less than that.

@kentborg Thanks, Kent. I'm inclined to redo it with 16 gauge enameled wire from my junk box. I enjoyed winding it originally, so I might as well make it bit more capable.

@krisguy @gmoretti Thanks, Kris!

@chrisfarnham Fun! I'm planning to play #APRS on my #Mobilinkd and #FT70d next week.

Wound a 9:1 unun today.
Looks promising tested against a 470 ohm resistor, unlike my first attempt. Question: is 18 gauge (1 mm) wire good enough to handle 100 watts? #AmateurRadio #HamRadio

A Nano VNA connected to a toroid wound as a 9:1 unun shows an impedance of about 43 ohms at about 18 MHz when connected to a 470 ohm resistor.

@KC8JC @ai6yr Thanks for your comments about lower speeds being OK. It's demotivating to feel like the speeds you're still trying to achieve aren't good enough.

@ohiorob It looks like a 9:1 unun project is in my future.

@ohiorob Thanks for the scan. I didn't, realize that SWRs could be consistently decent with a random wire. My failed attempts at getting an inverted L 80M EFHW across multiple pine trees yesterday (constant snags) has me thinking about simpler (shorter) multi-band alternatives.

@ohiorob Interesting! What was your antenna?

@smitty So that's the downside of using less than the full toroid. Makes sense. Thanks for the tip!

@W0AMT Nice! Beautiful country around Truchas.

If I tapped a 49:1 unun at turn 6 (indicated by the red arrow below), could I use that tap when I want a 9:1 unun? A dual-purpose unun could be handy. #unun #HamRadio #AmateurRadio

A drawing showing how a toroid is wound to make a 49:1 unun. A red arrow indicates a proposed tap at winding 6.

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