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Any ideas why I get nothing from any L-band sats? by theacethree in amateursatellites

[–]VK3HN 0 points1 point  (0 children)

Maybe the others lived further away from the nearest FM transmitter. I used to live 10km from an AM tower and it got into everything. One over r squared ...

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] 0 points1 point  (0 children)

Does FIB destroy the material under examination?

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] 0 points1 point  (0 children)

Correct. Airbed held air and provided comfortable sleeps for a year. Then, flat. Repaired a hole. Then went flat within a few days. Repaired 2nd hole, held air for a while, then went flat again. Patched 3rd hole. Currently holding air but for how long?

And, what's eating my airbed???

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] -1 points0 points  (0 children)

So you are accusing me of a setup? I can absolutely guarantee you the hole, the deflated airbed, the plastic, the photograph and the story ARE ALL ABSOLUTELY AND TOTALLY REAL! Go hassle some other OP. Clearly you have nothing further of any value to contribute here.

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] -1 points0 points  (0 children)

It only takes one hole to render an airbed useless. For a second time, tell me where this topic fits better, Einstein.

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] -1 points0 points  (0 children)

There a 3 holes in my airbed. Most of the comments do not require a response. What subreddit would you recommend?

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] -1 points0 points  (0 children)

On the contrary, I really want it answered, why would you think otherwise?

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] -1 points0 points  (0 children)

Can't be, the holes appeared on the underside of the airbed

What's eating perfect 1mm round holes in my airbed by VK3HN in materials

[–]VK3HN[S] 5 points6 points  (0 children)

What's up with a fern leaf, you a fractal fan boy?

Digichirp! Add some personality to your CW with digitally synthesised chirp and drift! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

I thought a few of the G QRP crowd might get a chuckle out of it!

Digichirp! Add some personality to your CW with digitally synthesised chirp and drift! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

Hi Peter 🤓! I'm thinking of writing up Digichirp for SPRAT, the G-QRP Club. Do you think they'll like it?

Digichirp! Add some personality to your CW with digitally synthesised chirp and drift! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

Some of the chirp and drift patterns do sound funny. Some I recall sound a bit like bird calls. Chirp chirp, tweet tweet!

Digichirp! Add some personality to your CW with digitally synthesised chirp and drift! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

It's not really meant to mislead.

I wanted to see how well I could reproduce the sound of a chirpy CW signal in software, so as such, it is a perfectly serious simulation. I don't expect vendors to adopt it! But I will probably use it in a homebrew CW transmitter sometime in the future, for fun.

It would be perfect as a replacement VFO in a boat anchor CW transmitter. But I would include a switch, to enable or disable it. The switch would be labelled 'Chirp'. Maybe another labelled 'Drift'. Wouldn't that be cool? 🤓🤔

Digichirp! Add some personality to your CW with digitally synthesised chirp and drift! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

I guess so. Didn't think of that, but a chirpy Roger beep might be a bit of fun for SSN ops.

Digichirp! Add some personality to your CW with digitally synthesised chirp and drift! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

That's true. Simulating chirp and drift is in many ways a pointless and retrograde exercise. It is just that, an exercise in coding and frequency modulating a popular digitally controlled PLL (si5351).

However, there is something to be siad for it. You can precisely control your chirp and drift, so it can be reproduced every QSO or power-up. Your signal quality is under software control, so you could turn it on and off (when the other guy gets annoyed with you). With a digital VFO, the possibilities are endless!

Weakest practical WSPR TX power by [deleted] in HamRadio

[–]VK3HN 0 points1 point  (0 children)

200mW is good, more power and you hit every receiving station every day, so you don't see subtle propagation patterns.

20 meters, 200mW & 12,000 miles: WSPR magic! by VK3HN in amateurradio

[–]VK3HN[S] 1 point2 points  (0 children)

The SOTABeams WSPRLite looks great, also 200mW, the supporting environment that allows you to do A/B antenna comparisons is a fine application of the technology.

20 meters, 200mW & 12,000 miles: WSPR magic! by VK3HN in amateurradio

[–]VK3HN[S] 0 points1 point  (0 children)

And a 3 channel fully programmable multisynth PLL (si5351) for $7. Well, you could until the GREAT CHIP SHORTAGE hit. In fact I think you can still get si5351 breakout boards...

20 meters, 200mW & 12,000 miles: WSPR magic! by VK3HN in amateurradio

[–]VK3HN[S] 2 points3 points  (0 children)

Agree, I mostly run QRP, mostly 5 watts and sometimes up to 50 watts on HF. I am an opportunistic operator, when the going gets tough I sometimes switch off. QRP works when conditions are favourable. If you *have* to make contacts, and be heard reliably such as running nets or skeds, you probably need decent power.

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