开云体育

On Mon, Dec 18, 2023 at 02:27 PM, Lon Lease wrote:

It would be a very top end feature.? What do you think Oleg?

I don’t see any fundamental problems to implement this. I'll think about how this can be done beautifully

Hello Scot,

Hi Oleg,
I have a feature suggestion, I was wondering if it was possible to devise a fast slow dynamic tuning rate?

If you are on 10Hz and start to tune quickly it might step up to 100Hz then reduce back to 10Hz when the spinning slows down?

This is similar to the TECSUN PL-660 SW RX that has auto Slow/Fast tuning.?

For CW ops, it would be a massive help I think when you see a signal on the magnified spectrum but you are in 10HZ mode, it takes a long time to get top it without more button pressing.

I wonder if anyone else would like such a feature?
Thank you for you amazing work on this ?by the way, from one coder to another... it is very appreciated.

On Mon, Dec 18, 2023 at 09:52 AM, scot forshaw wrote:

Does your FW rely n the original base FW at all? I ask because I recently updated the the latest stock FW also..

Partially, all signal processing occurs in the BB processor - I cannot change this part yet. But I have installed BASE: V1.1.7 for a long time and everything works well.

Hi Oleg,
thanks for your reply.?

This morning I rolled back to V0.18 and found the same problem, at least on my radio. (decodes hang and mostly impossible to decode reliable)

So, I tried rolling back to V 0.171 and the CW decoder came back 100% perfect !!!?

For me V0.19 the decoder is not good in any but the best conditions - V 0.18 the same. V0.171 is amazingly good and every single QSO I tuned to (even bad signal) the decodes we quick, accurate and the text buffering was gone.?

The problem I see on 0.18,0.19 is that the decoder sometimes goes blank and never decodes, or it is so tight on the filtering notch that it is almost impossible to get the signal on frequency so that decoding starts.?
As soon as I loaded V0.171 my old amazing 6100 was back and tuning around almost any CW signal led to great performance.

?did try many many times with the the laster versions.?

?Does your FW rely n the original base FW at all? I ask because I recently updated the the latest stock FW also..

?there is anything you want me to try, ?am happy to oblige. Thanks, Scot

Hi Rainer, you are correct.

I have disconnected the internal battery.
On receive, no volume, BL lever 2:
External voltage versus current:
13.8 V / 342 mA (4,73 W)
9.0 V / 511 m A (4.6W)
With the nominal 7.7 V of the battery - I guess the current to be around 620 m A
With the 3 hours and 48 minutes this comes to a consumption of about 2360 mAh
This is 80 percent of the total capacity of 3000 mAh
And so my rig does not seem to be far off what we can expect.

73, Lorenz, HB9BMR

Another point to keep in mind is that the embedded system (Allwinner R16 quadcore) has its own power management chip with several DC/DC converters. When varying the supply voltage from 12 to 9V, you will see that the input current rises - DC/DC converters try to keep the input power constant, so the 330mA mentioned may be correct for 13.8V, but at 7V I would expect about double that value.
If you want to check whats going on during charging, the X6100 is transmitting the battery voltage, capacity and relative charge state on the second serial port. You have to connect via the "DEV" USB port, setting the UART to 115200, 8N1. Connect external power, turn on the radio, then turn on charging, then turn off the radio. You should see boot messages and then the charge status messages.

In my case (Win 10 laptop), the relevant serial ports are Com3 and Com4, the latter one for charging state.

With Olegs 0.19 software, my fully charged x6100 ran 4h 30min in receive mode, and after charging it showed 2900mAh. BTW the charging chip reported 100% charge state at around 1900mAh and 8V, that was the point when the blinking of the LED changed to permanent "ON" - but it kept charging until the battery was charged to 8.4V. I assume that several shallow discharge cycles confuse the Coulomb counter, but a few full discharge/charge cycles should correct that.
More info can be found in the bq24715 data sheet (available at the TI homepage). 8.4.6 Learn mode could be relevant here...

73,

Rainer DG1SMD

On Sat, Dec 16, 2023 at 09:57 AM, scot forshaw wrote:

Some updating to V0.19 I have been having a lot of difficulty in getting CW decodes working with any reliability. ini V 0.17 the decoder was an outright awesome improvement of the stock one, but I am really struggling to get the new one to play ball.?

Version 0.19.0 has exactly the same settings as in 0.17.0. Before the release, I checked the operation of the decoder.

Does anyone know what CW peak and CW noise BETA are? How to set them up

I guess I know (LOL).?These settings are set to optimal by default. I spent quite a lot of time on this. I should have removed them, but I left them for experimentation. Experiments have shown that it will not be possible to configure it even better.

Hi Oleg, group.

Some updating to V0.19 I have been having a lot of difficulty in getting CW decodes working with any reliability. ini V 0.17 the decoder was an outright awesome improvement of the stock one, but I am really struggling to get the new one to play ball.?

I often need to restart the radio to see any decodes after making any adjustments to CW settings (like the stock firmware used to just stop decoding for ages unless you restarted it)?
The decodes are sporadic for me.

Does anyone know what CW peak and CW noise BETA are? How to set them up?

Thanks
Scot

Yes - that's right. ?Definitely important as someone mentioned earlier.
Tnx
Howard K4LXY

Howard, make sure you’re not charging the radio while using it. The main menu has a charge on/off choice. ?

Mars. Kc3jjh

On Wed, Dec 13, 2023 at 10:40 AM, John - KZ4AX wrote:

I use end fed random length, not resonant on any band. ?I need to get a 9:1 unun to see if that makes ol’ random wire ‘work’ better.?

It may or may not work "better", but here's the theory. With the right random wire length (kind of an oxymoron, if you ask me), the impedance ends up being close to 450 ohms on the bands of interest. The awesome tuner in Xiegu rigs can go ahead and match that just fine. But a 9:1 unun will bring it closer to 50 ohms. It'll be a perfect match on a band or two, and often 3:1 or less on all the others, making the EFRW a great antenna for rigs regular tuners.?

Here's how you test the theory: attach a 450 Ohm resistor across the antenna and counterpoise connections of the unun (no wires attached) and check the SWR with a NanoVNA or your favorite analyzer. If the unun is made with iron core material, you will see a steep drop just before 40M down to nearly 1:1 to 10M and beyond. The iron core's efficiency drops off quite a bit below 40M, which is why the EARCHI design rightly states that it is for 40M - 10M. Does it work on 60, 75-80, and 160? Yes, but the losses increase exponentially.?

You?can?make one with type 43 ferrite cores like the FT82, FT140, or FT240. Heck, you can liberate toroids from old monitor or power cables and use them too. Your subsequent test will show a much flatter SWR down to 2 MHz.?

So, back to the question about whether it'll work better, yes - it will in cases where you want the antenna farther from the radio, like up on a pole or attached to a building. Coax losses begin the enter the equation, so quality coax is better than RG316 or RG174, but anything will work, and the improvement from greater height will almost certainly be far greater than any coax losses.

In any case, though, a counterpoise is highly recommended. You?can?rely on the shield of the coax to do this, provided it's at least 16' long. Some common-mode currents will be present at the transceiver. They may be trivial, or they may cause weird, wonky issues. For that reason, using a 1:1 common-mode choke at the rig-end of the cable is a good idea. It can be as simple as 12 turns of coax through a type-31 or 43 mix toroid.??

I encourage?all?hams to experiment with antennas like this, and also to build their own transformers. Look through your junk box for laptop power bricks or old VGA monitor cables and carve out the suppression core. Check it at two points with an ohmmeter. If it shows no continuity, it's probably type-43, which is perfect. If it shows?some?connectivity, it's probably type-31. It will not work great for antenna transformers, but you should save it for a home-brew current balun. Save the wire from the cable to wind the transformer.

with the plans. If you build it correctly, it will pass the 450-Ohm resistor test. Head out to the field and try it with the recommended wire lengths. IT WILL WORK!. Frankly, you will love it, and you'll get a tremendous boost of satisfaction from having done it yourself, especially if you use scavenged wire and cores. This is one of the most satisfying aspects of our hobby!
?
--
73 de K9NUD

I'm largely CW. ?I do have a heat sink on the back, but the critical issue to keep the heat down seems to be keeping the voltage at around 11V so that the regulator doesn't have to dissipate so much heat. ?I sometimes power it with ?a power pack and a USB-C 12v trigger dongle with a diode in series to drop the voltage. I have also used a buck converter with no problem. There is some info about these things on my blog in case you are interested.


73 Howard K4LXY

I use a cheap USB powered fan from Amazon. It will last for 2 days on a cheap small power pack for phone charging. Keeps it cool doing a couple hours of FT8.

I use fishing poles with wire antennas, I get annoyed trying to string them up in trees. A fun vertical kit antenna that works amazingly well is the DS1 antenna. It is light compact, and works much better than I expected. The wolf river coils are US made, and reasonably priced. Gabil antennas on Amazon are Taiwan made, and well built. A 17 foot whip and a CB mirror mount attached to a long spike will get you 20-6m.

On Thu, Dec 14, 2023 at 12:24 PM, Lisa WO?L wrote:

I echo that, I use Sandisk exclusively and I’ve never had any issues with any card I’ve owned.? I know of several instances where people used off brand cards and had trouble until they switched to a quality card.? I’m sure other name brands are fine as well but stay away from the cheap ones.

?I'm using MicroCenter "buy at the register" cards and it boots fine.? Will not boot from a Kingston.

On Thu, Dec 14, 2023 at 08:24 PM, Lisa WO?L wrote:

I’m sure other name brands are fine as well but stay away from the cheap ones

Not everything is so simple. I have several very cheap Chinese SD cards in my work. And everything works flawlessly. As for the X6100, there is a suspicion that there are peculiarities in the implementation of the SD interface. It might make sense to try to programmatically limit the speed of working with SD, maybe this will help. But this needs to be explored.