n6gn
About
- Username
- n6gn
- Joined
- Visits
- 5,425
- Last Active
- Roles
- Member
- Points
- 31
Comments
-
Not only does the PoUSB solution, pointed to above, work for stock KiwiSDRs, but BBAI/KiwiSDRs work very well with the on-board BBAI WiFi. Either of these approaches eliminates the common mode LAN noise path described n the PoUSB document. I've con…
-
http://forum.kiwisdr.com/index.php?p=/discussion/2246/power-over-usb-modifications-for-a-kiwisdr#latest describes a method that has worked well for me. See the document. Glenn n6gn
-
I too like it, even if only as a reminder. Glenn n6gn
-
I tested Master Electronics by ordering only a single enclosure. The process went flawlessly and the enclosure arrived as promised after 8 days. They seem to be fine. Glenn n6gn
-
OK, one final post on the subject. Here's a summary. A stock KiwiSDR with only a client USB (micro USB connector) connection to an inexpensive router can be used to create a stand-alone WiFi'd Kiwi with power&Ground as well as USB data. thus av…
-
Sorry, my post was confusing. I am in fact developing on a stock KiwiSDR with a BBG. I won't move to an AI until I sort this one out. Supply is OK so that's not the issue. However I'm now investigating USB client/host signalling. The BBG has a conne…
-
Stu, Could be part of the issue I'm seeing. Others have mentioned this so I'll recheck power quality. It's possible that I've degraded it with the POUSB system. There's also been a report that reloading the entire OS of an apparently functional Kiwi…
-
I've returned to examining operation using the USB port recently. I had the same experience Rob reported in that I was able to talk to the Kiwi's BB on 192.168.7.2/USB but this seems to be a complex system and I don't yet understand it. The reason …
-
I know very little about the TDoA algorithm but I suspect both @jks and @Christoph are correct. Between the limited bandwidth and especially ionospheric propagation, typical Kiwi clock imperfection probably does not become an issue. For an appreciat…
-
http://forum.kiwisdr.com/index.php?p=/discussion/comment/11323#Comment_11323 Comcast Xfi does indeed blacklist Kiwi ports in the default security mode. That has to be turned off since they added it as part of their web configuration of home routers,…
-
That's why I chose APRS as the data channel. It stays up when the Kiwi system is down, has built-in worldwide distribution and can be done with cheap hardware within amateur radio. With the Arduino as controller a whole host of sensors are similarly…
-
The family of lines in 6.5-7 MHz you suggest seem to me to be power line related, though this is true of many SMPS noise sources. When I detect in 10 kHz AM and analyze with Audacity I see astrong 50 Hz family/component http://forum.kiwisdr.com/uplo…
-
-
I designed and built an APRS/solar_charger for monitoring the PS at a remote KiWi site. It's not quite what you are asking for but since the Kiwi data is IP over microwave, the use of out-of-band monitoring means I can see the power situation and te…
-
In spite of the low end roll-off, I do see lines in MW that might be explained by an SMPS at ~20 kHz (bipolar transistors?) with rather wide spectral lines. By 1.6 MHz these lines are all merged and the coherence isn't as obvious but if one listens…
-
I just run multiple tabs in a single browser, one tab/kiwi-receiver. That allows separate audio, squelch ... for each of the receivers. It's sometimes useful to do this on kiwis that differently located and experience varying and different propaga…
-
Presuming I have the correct K7GFH-associated Kiwi, at 1450 UTC you really aren't doing too badly. While I do hear a mains-related family of QRN from LF half way into HF, the levels aren't that terrible. Using the 10 kHz AM detector to allow heari…
-
I think a more accurate UI could improve performance too. As an example, the last time my remote KiwiSDR returned to the site, antenna parameters were adjusted based on the OV indication with 1 event per 64K samples selected. This resulted in fair…
-
@jks I think we're dealing with it by using the 2x.5A available from the (dual output) TPS2051 sourcing the USB-A connector. Rob has built a Y cable so he could get data from the microUSB-client connector but power from the USB-A. It may be that th…
-
Rob,AI6VN, and I have looked at using Kiwi/BB in a "power-over-USB" manner in order to hopefully reduce ground loops and noise with a single OpenWRT WiFi router. While Rob has been using it with the KiWi/BB as client, using the microUSB …
-
When chasing low impedances or shorts on a board like this, before the most drastic steps I often use a current-limited supply set to something reasonable such as perhaps only a few hundred mA, and then use a millivoltmeter across PC traces to follo…
-
I gathered remote off-Internet data again today and this time remembered to try out the Kiwi's WSPR extension with the new GPS additions. It appears to work correctly in the absence of any (functioning) RTC. Only a GPS antenna is required to pro…
-
Last night I took my portable wpsrdaemon/RPI3/Kiwi system with v1.412 out to a semi-remote site and collected WSPR and noise data. Previously (without GPS) it had been necessary to set the Kiwi clock so that WSPR spots would be nearly the correct f…
-
Thanks John. I like the aperture mode selection and the ability to better use the spectrum to convey larger dynamic range. I think it can do everything I want. Colormap Designer, on the other hand, does more than I'm capable of easily handling!…
-
From your description, it sounds to me like the SDR PCB has a very low resistance path to ground and is pulling too much current such that the BBG sourcing it goes into current-limit. When the SDR is unplugged from the BBG what resistance do you me…
-
@la6lu that made me smile... I too had problems with the factory fan and replaced several with Clint's suggestion https://www.alltronics.com//cgi-bin/item/28F082/search/Sunon-5V-Fan-Size--30mm-x-30mm-x-6mm- I've now replaced four fans with this a…
-
I think it might be very profitable to investigate for the presence of common mode noise current from the new router, over the LAN cable, through the Kiwi and out the "other side" where "other side" is the SMA connector to antenn…
-
I concur with @njc. It turns out to be pretty difficult to get high coupling between two antennas. period. In the near-field not all the energy is available. In the far-field, apertures don't permit high transfer. I once tried (at low microwave) t…
-
Be careful that their "Advanced Security" (https://internet.xfinity.com/connect) is not enabled. It ends up blacklisting multiple sites that are necessary! Everything quit for me when I enabled it and it took a while to figure out how &quo…
-
I think your ceiling/floor slider could go a long way to adjusting a WF the way I typically do. I almost automatically hit 'shift W' about 6 times every time I auto scale. Sometimes I also bring the maximum down 10-30 dB as well but it's the dark b…