The elevation on my old Yaesu G5400 failed last night. The load of winter with heavy snow freezing on to the EME antenna made it to heavy for the rotor, it stalled, then the elevation motor fried due to me not detecting what was going on.
The antenna is only a single antenna for 144mhz at 3wl length, a bit heavy balanced at the rear.
I think the G5x00 series I great for small SAT antennas, especially with its 180 degrees elevation movement. However, I think it is not sufficient to operate mid-size and up antennas in cold and snowy conditions. NOW! Tinkering about what to do next……..QRT for now, but will be back.
HAM Shack window shot: New Years Eve @ 15:30 local time
Update: I want to point out that the sun is well below the horizon here, and it is not the moon doing this. Have heard by others that we have had Nacreous clouds, sometimes called mother-of-pearl clouds today, guess it has something to do with this.
Anyone seen this error before?
Sound devices seems to be in place, but the router software will not recognize the MK2.
UPDATE: Delete the device, unplug USB, reboot computer. This did the trick!
Probing around for a powerful 48vdc supply solution I landed on a fair priced Eltek Flatpack2 rack unit. I know, it is an overkill for HAM shack use with its 8kw of DC output power. But as Jeremy Clarkson says; quote “Power and speed solves many things” 🙂
Anyways, this really is a part of a telecom UPS system, and telecom 48vdc system has negative distribution with positive common return rail. This is the opposite of what we HAM usual needs, so it has to be rewired, or re-bared rather.
This is a 2U rack module with a smartpack2 controller and 4 x Flatpack2 2000w HE rectifier units. You can run a single rectifier without the controller but it will default to about 53,5 volts. In order to change the operating output voltage, you need the smartpack2 controller.
With the factory access password, you can with the controller permanently write new settings down to the rectifier, and it will default to any valid voltage value. Of course it is possible to hack and reverse engineer the eltek CAN-bus protocol with other tools. I know the e-bike community has done it.
Here are some pix:
Smartpack2 rack without load fuses cover panel.
Smartpack2 rack unit
Original common positive (+) return bar.
Rewired to common (-) negative return bar.
PowerSuite for M$ windows config and monitoring tool.
Want one of these; search for “SGVU-L” @ ebay.
I am planning to use this in displaying RF-power measurement, but it needs some modifications. So stay tuned……………
Here is some more info:
I got this of ebay as a kit. PCB’s are very nicely build. Kit comes with LM3916 chips, which is a semi logarithmic VU meter LED driver.
Cascading six of these don’t really make any sense if you want to use it as a meter for readings.
So, I have replaced the LM3916 with one LM3915 logarithmic 3 dB/step driver chip for the ten first LED segments, then five LM3914 linear LED driver follows for the rest of LED segments.
Of course this is for one channel only, so you need 2 x LM3915, and 10 x LM3914 for doing both channels.
This is not unusual at all, but it is very unfortunate.
Currently the local ambient noise level is 4 or 5 dB higher then I can tolerate.
I simply cannot hear anything of the moon at this noise level.
I am standing by, and hoping it will go away.
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