n6gn
About
- Username
- n6gn
- Joined
- Visits
- 5,359
- Last Active
- Roles
- Member
- Points
- 27
Comments
-
Send me a small self-addressed padded mailer with enough postage and I'll send you one. I'm good on QRZ.com Glenn n6gn
-
Again, thanks John. That fixed it. From the database: https://forum.kiwisdr.com/uploads/377/IBZG8BWXAYA3.png N6GN/H is now reporting the correct frequency ( modulo 1.3 Hz intentional offset to cover baseband and ext clock error on N6GN/K which is a…
-
Thanks very much,John. Those changes in Kiwirecorder and the Kiwi have indeed made it possible to offset and tune a Kiwi both manually and from wsprdaemon (by way of kiwirecorder). I have been successfully and correctly spotting into the database …
-
Using the new -o option in kiwirecorder followed by the output of something like: curl -s --get 'http://[hostIP]:[port]/status' | grep freq_offset | awk -F'[=]' '{print $(NF)}' may not be the best or 'proper' way to do it but it seems to work and sh…
-
Thanks John, I hope to try that shortly. It would seem that all the pieces are available to make it possible. @studentkra the tunable converter for the Kiwi receiver is a subset of a full up/down converter for converting any 10-30 MHz HF radio in …
-
Yes, I know that managing the offset separate from Kiwirecorder - running it only at an IF works to get the correct audio but it does it with incorrect frequency. I'm presently doing this but this causes a problem with wsprdaemon which has correct…
-
In general mono-poles, whether large or 'whips', tend to be difficult to use because of common mode noise current ingress. See a note I wrote about this and other SNR issues Here. While semi-solutions of the form "use this ferrite, with this …
-
Is it any use to change the port to something that has never been advertized or do these bots do port scans looking for a Kiwi? It might be worth trying some out-of-the-way port number, particularly so if some other measure such as Uncomplicated Fi…
-
Having labeling on frequencies >32 MHz would be a benefit when a Kiwi is used with the broadband downconverter such a the one I have designed and built, as well, however, I have no idea at all whether the return would be merited by the effort it …
-
The other reason to power through the bbai is that the filter inductor on the Kiwisdr board runs way over spec when powering the bbai. It will eventually fail.
-
FWIW, if you are to be messing with CTCSS it would be great to NOT hear it on demodulated NBFM. As far as I can tell, there is no post detection HPF available available. But perhaps that can be accomplished with host computer system audio settings …
-
Somehow waterfall displays have become all the rage, however I find a calibrated spectrum that reveal at least relative levels of all signals within a bin to be far more useful. But then I come from a spectrum anaylzer background, some people like w…
-
Is there a way to turn the spectrum display on prior to saving a waterfall? That is far more useful and informative to me than just the wf alone.
-
"coax picking up some noise" probably means that CM current into the coax is creating IZ drop across the Kiwi ground plane. Conversion from current through the Kiwi 'ground' to equivalent differential input at the Kiwi preamp 50 ohm input…
-
Joe, Certainly try it with and without the center tap connected to something. However do recognize that the amount of balance needed to push CM current contributions below a Kiwi's noise floor may take a lot more balance than typical hardware can pr…
-
Try a MiniCircuits T1-1 located right at the Kiwi. It has about 1 pf interwinding capacitance and a low end that will almost make it to 100 kHz. The dipole (what size?) no doubt has a great deal of mismatch loss at LF but ITU noise floor rises fas…
-
A careful assessment of the spectral purity from the Bodnar mini and original GPSDOs while tuning in the 66.66 MHz region would require quite a lot of effort. High resolution frequency generally means larger integers and the risk of boundary spurs …
-
Wow, can't help you there while there are higher current versions avaialbe I haven't found one that switches at higher rates and also has small area so as to minimize unwanted coupling. I think with some care you might be able to parallel two of th…
-
These https://smile.amazon.com/gp/product/B01MQGMOKI/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 have shown themselves to work pretty well. They switch at just below 1 MHz and have quite small area so don't generate a lot of field. Some of…
-
Thanks for measuring. That's a lot more power than BBG or even, I think, than the BBAI. Perhaps fine where there is sufficient power budget but not clear to me that it is a good choice for a remote solar power site.
-
The System Reference manual says "A 5V ≥ 3A supply is mandatory" has anyone measured the actual peak and average current or power under Kiwi-like operating conditions? I don't see it described in the documentation.
-
I think I might take exception to the ability of a native Kiwi/GPS to do a good job on 20m and above on modes longer than 120 seconds. Particularly for FST4W's -300 and longer modes, short term stability of the Kiwi's clock seems to incur enough sp…
-
Don't immediately fault the Kiwi HW because the reported SNRs are different. At low levels SNR numbers are suspect (ref K1JT) and it is likely that the algorithm has changed between the extension's decoder and WSJT-X. If the noise floor is establis…
-
@jks Now that you've already downloaded the monthly tome I thought I'd mention that wspr.rocks also (mostly) reports version, can go back to the beginning of time (well, you know what I mean) and is blazingly fast. Here's a search of unique calls …
-
See my previous post. FT50-61 and about .012 uF is one solution. Make the C from parallel .01 uF and a ~.002 uF trimmer. You can probably see where the center of the notch is by loking at noise floor. Tweak the .002 uF as necessary. Make it from mul…
-
"nearly 60 dB over so probably want at least 20 dB reduction ?" No. You really only need about 3 dB to get out of OV. This is an SDR not an analog receiver, level doesn't matter much until you run over the top of the ADC and then it tota…
-
Although a complex filter like this can no doubt be made to work just fine, it reallyl is over-kill for your problem. All you really need to make the Kiwi happy in your situation is a few dB of attenuatiom right at 272 kHz. For this, the simple seri…
-
I think you want a smaller core with lower permeability, maybe something like this (handy calculator here) http://toroids.info/FT50-61.php with about .012 uF. I don't think wire loss will dominate so small wire that lets you get 20 turns and prett…
-
There certainly was ! How quickly I forget... Apparently none of those previous suggestions were followed and the request "Any filter I could use to filter the LW band" doesn't include home constructed ones. oh well....