Justin @[email protected]

3.3K posts

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Justin @k5em@mastodon.radio

@k5em

Tech, ham radio, hacking, weather. HW/FW/SW engr mapping with drones. I don't live here anymore, find me at the blue site @k5em.com or @[email protected]

Seattle, WA Katılım Aralık 2012
547 Takip Edilen934 Takipçiler
Randy ND0C
Randy ND0C@randy_ND0C·
It appears that satmatch.com is down. I haven't checked for a while so don't know how long it has been down or if it is permanently gone. Any suggestions for alternatives? It is/was a great tool to look for RS-44 passes with footprints in Europe while I'm roving.
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Justin @k5em@mastodon.radio
@AD0HJ @randy_ND0C All fixed. Dreamhost changing things on my vps with super short notice is getting old. Let's do an OS upgrade with no failover, and good luck if anything we do causes your stuff to break!
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Justin @k5em@mastodon.radio
@k5zm_ The other POTA option I used during Salmon Run was a car hitch flagpole mount to support an 80-10EFHW. 10m spiderbeam pole on the car; far end is a 5m fiberglass pole - I used a single 24" metal stake and the pole just slips over the stake but I could have lashed it to the fence
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Justin @k5em@mastodon.radio
@k5zm_ If I'm somewhere with a shelter or picnic table, sometimes I'll use the reusable rubber twist ties to lash it to a table leg or a post. Up here in the PNW I also used to use an arborist throw line quite a bit, but I found that the 7.2m mast is just easier and quicker.
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Ian K5ZM
Ian K5ZM@k5zm_·
Looking for non-stake guy anchor options for a 20' telescoping mast. My mind says 'kettlebells' but holy crap -spendy- and how far do I wanna be lugging those? I'm probably overthinking this and missing something simple/obvious. Thoughts? Tnx.
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Justin @k5em@mastodon.radio
@K5PO This radio has one of the better DSP noise reducing features I've ever used. Amazing that it's come down so much, but no waterfall for eye candy drives it there I think.
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Andy Holmes, K5PO ⚡️
Wild to see such a fine radio as the Yaesu FTDX-5000 going for as low as $1800. Amazing rig for the money!
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Peter Vogel
Peter Vogel@PeterVogel·
Here's 24 h of FT8 monitoring, all bands 10 through 160 m, in Vancouver. MLA-30+ loop antenna. As usual, ZS2DL in South Africa, holds the distance record for a signal into my station, 16,483 km. Note PSKreporter doesn't map everything. @ZSsixSHN @k5em @K3TripleR @K4ZMF
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Henning Paul
Henning Paul@hennichodernich·
@k5em @PeterVogel @ZSsixSHN @K3TripleR @K4ZMF In the past I've used 8 WSJT-X instances directly with the sdr_receiver_122_88 project for the PDSDR (it supports up to 16). But that requires a desktop system, consuming more power.
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Justin @k5em@mastodon.radio
Last day to order a SotaCAT this year! Get WiFi control, click-to-tune spotting, and SotaMAT integration on your KX2/KX3. We have a few in stock still; any in-stock orders today will ship tomorrow, then we're taking the holidays off. store.invertedlabs.com
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Justin @[email protected] retweetledi
Peter Vogel
Peter Vogel@PeterVogel·
First time over 100 countries in 24 h! With the amazing PDSDR, monitoring 16 FT8 frequencies simultaneously. Just look at the coverage. Many countries I've never seen signals from before. MLA-30+ loop antenna here in Vancouver. @k5em @K3TripleR
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Justin @k5em@mastodon.radio
@PeterVogel @ZSsixSHN @VE7SAR @_VA7LM The other approach that might be fun to try is to change the configuration over to sdr_receiver_hpsdr_77_76 and use a PC with SparkSDR - this will let you receive FT4 and WSPR simultaneously as well, but it's more work to set up and uses quite a bit of PC resources.
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Peter Vogel
Peter Vogel@PeterVogel·
Even better! Will I break 100 countries? Here's 24 h of monitoring 16 FT8 frequencies simultaneously, using the PDSDR. 74 countries in 24 h. 96 over past week. Using only a cheap MLA-30+ loop antenna. Amazing! Note: 4385 transmitters showing. @k5em @ZSsixSHN @VE7SAR @_VA7LM
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Justin @k5em@mastodon.radio
@PeterVogel @ZSsixSHN @VE7SAR @_VA7LM I think the single-channel approach is benefiting from the pre-amp and AGC in the SDRPlay. I suspect you need 10-15dB of preamp in place, but only if it doesn't saturate. Alternatively, a random wire antenna would likely increase the signal levels and help out as well.
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Peter Vogel
Peter Vogel@PeterVogel·
@k5em @ZSsixSHN @VE7SAR @_VA7LM It's worth noting I haven't yet beaten my own record with a single SDR receiver (same antenna) and manually switching between bands.
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