Re: QMX+ with 100 amp/hour lithium iron battery
Tisha,
I wanted to make sure I'm understanding what you are saying.
As stated earlier, I am using a Drok to regulate from a 12v LiFePo Bienno 3 Ah (actually 13v as I measure it), down to 11.9v. I hear you saying I might be losing more in heat from the Drok than the rig is putting out in power when transmitting (a lot more, in fact!). Yet, I don't feel any detectable heat coming from the Drok.
Is there something I've misunderstood?
TY 73
Braden Glett KD8ZM?
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Re: Winlink and VARA HF setup for QMX
You might find this group /g/Winmor, useful for assistance in setting up and using Winlink.
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This isn't specifically for QMX but if you repost your question there, someone may be able to help you.
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JS8 Call
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73, Dan - W2DLC
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HDSDR with OmniRig.
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73 N6HAN
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Re: QMX+ with ~1000 tone on 12M & 6M
Thanks for the clarification,? Hans - I forgot to look at the package size.? So it would require a mini-pcboard adapter - may still be worth trying since we can't get small orders of the 4334 anymore.?
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Jim, thanks for the information.
Enjoy your QMX+.
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73 Ludwig
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Other than WSJT-x, what do folks use for waterfall display and CAT control under Windows?
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Brent DeWitt, AB1LF
Milford, MA
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Thank you for the reply. Does this mean you are currently working on a simplified filter or are you still strictly in SSB mode? Is anyone simplified filter such as I described a relatively easy add, or a difficult one? Thanks again.?
I'm in try-to-catch-up-from-holidays mode. Then there are the bug fixes and enhancements arising out of the SSB beta firmware. And it's imminently Hamfest season (Dayton, Friedrichshafen). And a hundred other things that I have neglected for the last 9 months. So I'm not currently working on a simplified CW filter. But I will... And I wouldn't say it's a difficult thing to do. Just that the cascaded filter thing was almost trivially easy at the time Reg suggested it to me, I got intrigued and thought "why not". The hardest part was the special handling of the menu but even so if I recall it was less than a day's work. So that's why it was done then, it wasn't a big interruption to my SSB marathon.? 73 Hans G0UPL
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Hans,
Thank you for the reply. Does this mean you are currently working on a simplified filter or are you still strictly in SSB mode? Is anyone simplified filter such as I described a relatively easy add, or a difficult one? Thanks again.?
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Hello Braden
I hope to see you in Dayton next month then?
I agree with you. As I posted earlier today, I was deep in the SSB project for 9 months which was quite a marathon. Last summer I had a suggestion from?Reginald Beardsley about overlapping two instances of the existing 300 Hz of 500 Hz filters at different centers, to synthesize many different center frequencies and bandwidths. I had on hand the DSP coefficients and it was a rather easy code change to make, which satisfied quite a few requests I'd had for different center frequency or bandwidth filters - at least in the interim until I'd have the chance to do something more elaborate. At that time I had a policy of trying to fulfill requests and fix bugs if they were relatively simple and quick. Soon after I slipped into "ignore-everyone-until-after-SSB" mode hihi.
Hello Hans! I haven't spoken with you since Hamvention several years ago. It occurs only 20 miles from my house. Nice to encounter you again? - you are doing amazing work.?
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What I would like to see as a CW operator is what I have on my KX3: Press the filter button and then turn a knob that varies the filter from 50 hz all the way up to 3khz. No cascading or overlaps to deal with, no reference charts needed... just a simple variable bandwidth filter. Maybe not that "simple" to accomplish ?
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From reading these forums, it's clear that I am far less technically oriented than most of the people lurking here. So techies will probably strongly disagree with what I want. As a business strategist I fully understand that if your target market is engineers and near-gineers, then you should definitely disregard what I am saying, and not uncomplicate the filtering. I know that uncomplicated things are generally not as versatile or flexible.?
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I hope that helps, my friend, thank you. 73
Braden Glett KD8ZM?
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Re: QMX+ with ~1000 tone on 12M & 6M
I have found that IC401 is essentially not available to the experimenter at this time, except from Amazon with long lead times.
I also found this - and looked at the newer cs4344 chip.? It is 10-pin rather than 8-pin, but the 'top' 8 pins are pin-compatible with the 4334.? I am considering experimenting with this chip.? On the QMX+, there is (barely) room to solder it in place of the current chip, and add the requisite capacitors to the two new pins.
One issue you are going to face is that CS4334 is an 8-pin SOIC and CS4344 with 0.05-inch pin spacing is a 10-pin TSSOP which has 0.5mm pin spacing (0.02-inch). The CS4344 is similar sized to the MS5351M. Much smaller than a CS4334. You can't just solder it on and take care of the two extra pins.?
I have been reviewing the two datasheets and it's interesting. Firstly I don't see any reason why a CS4344 wouldn't work and be compatible with current firmware.?
In several aspects the CS4344 has higher performance specifications than the current CS4334. Not that the current CS4334 is anywhere near to being the limiting factor in overall performance, so the higher performance of the CS4344 wouldn't be usable or noticeable in that regard.? 73 Hans G0UPL
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Found two unsoldered pins on the lcd board.?
Now display works great.
Now back to RTFM. ?Planning to start with FT8 before downloading the SSB firmware.?
Ludwig: thanks for your suggestions.
72/73
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On Apr 10, 2025, at 9:46?AM, DH8WN via groups.io <DH8WN@...> wrote:
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On Thu, Apr 10, 2025 at 04:44 PM, @Ludwig_DH8WN wrote:
pin 3 up to pin 15 (2 - 4, 4 - 5, ..., 14 - 15).
Sorry, typo!!!
Correct is 2 - 3, 3 - 4, ..., 14 - 15.
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On Fri, Apr 11, 2025 at 10:31 AM, <k3loe@...> wrote:
trying not to put money into powerpole tools at the moment.
I see your point, good crimpers are expensive.? This is one of the reasons I prefer soldering.? My one soldering iron works with all sizes of cables.? Also making a good crimp joint requires that the wire, crimp ferrule, crimp dies and crimper are all compatible.
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Re: Here's hoping for QMX+ v2
I've been kicking around similar ideas. I go back and forth on whether an all-in-one is better or not when portable/traveling (vs a separate PC/display.) There are pros and cons for sure to each.
Seems the zBitx has some bugs to work out on the FT8 front (per AE5X's blog), so by my view, it's not ready for FT8 POTA prime time yet. The DX-FT8 on the other hand just got a firmware release that allows SOTA/POTA and such, but I feel the <1w is a bit weak for reliable POTA/portable work.??
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-Nate
N8BTR
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Thanks all for the quick input.
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Jason wrote:
Here's a 16awg in line barrel fuse :
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I know their not 18awg,and that you might not want to buy it off Amazon, but at the least they can give you a starting point of search terms.?
Thank you, that's what I was looking for! 16awg is fine. Will look for that kit off Amazon. I ordered the barrel connector from QRP Labs when I got the radio.
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On Fri, Apr 11, 2025 at 12:56 PM, Chris, G5CTH wrote:
Don't remove the powerpoles from that lead, add Powerpole connectors to your battery
The main problem with that cable is that it's expensive and across the ocean, and I do have powerpole cables for the battery, but the barrel connector will be on the other side of the buck converter. Fair enough though, it's worth considering terminating the cable out of the buck converter with powerpoles too for versatility. I just don't think I'd have another need for a strictly regulated 12V source so I was thinking of this as a dedicated cable and was trying not to put money into powerpole tools at the moment.
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On Fri, Apr 11, 2025 at 12:05 PM, Sean [AK6BM] wrote:
It is infinitely worth your time to learn to solder and/or crimp, and to go ahead and get the equipment to do so
Yes, I know how to solder and crimp. I have a crimper for butt connectors and the like. It's the "getting the components and connectors and putting them together how I need" that I'm primarily asking about. I just don't want to have more splices than necessary.
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Re: QMX+ with ~1000 tone on 12M & 6M
On Fri, Apr 11, 2025 at 08:15 AM, Richard Hattaway wrote:
I have found that IC401 is essentially not available to the experimenter at this time, except from Amazon with long lead times.
I also found this - and looked at the newer cs4344 chip.? It is 10-pin rather than 8-pin, but the 'top' 8 pins are pin-compatible with the 4334.? I am considering experimenting with this chip.? On the QMX+, there is (barely) room to solder it in place of the current chip, and add the requisite capacitors to the two new pins.
Stan KC7XE
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Getting cable and even some basic crimpers and connectors is fairly easy. I'm in the process of setting something up for a go kit right now and loving my Wirefy () for making some quick connectors. You can do most things even without solder if that part is sketchy for you (although you can get good at soldering very fast with practice, too!).
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Don't remove the powerpoles from that lead, add Powerpole connectors to your battery, and everything else that needs or uses low voltage power.? Pairs of connectors can be assembled handed and so make connecting a supply the wrong way round much less likely.
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I have a constant Voltage and Current buck/boost regulator with PowerPoles and so can hook this up to provide regulated power with the voltage and current limits of my choice from a variety of sources to anything.
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Braden Glett
Daniel Conklin
Brent DeWitt