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Wanted to give a heads up - I haven't seen this battery in stock for a bit and I think it is a perfect match for the QMX.? I thought they were discontinued...
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It's the Turnigy 9xR
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3S LiPo cell, very small (approximately a stick of gum sized, a little larger), and it has a protection PCB built in to prevent over discharge or over current.
2.2AH of capacity, 3.3A max continuous current, 12.6v fully charged
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Can't argue with the price either at under $10
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https://hobbyking.com/en_us/turnigy-9xr-safety-protected-2200mah-3s-1-5c-transmitter-pack.html
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That's a great price on a 2200 mAh 3S battery for a QMX kit.? How do you ship without paying much extra?
3S batteries are great, I have 1 ea 3200 mAh?+ 2700 mAh @ $25 ea from Amazon DIM 3" x 1.5" x 1" with eBay T x 2.1 mm x 5 mm barrel connector dongle?@ $8 ea.
Makes for a nice compact QMX kit.
Wanted to give a heads up - I haven't seen this battery in stock for a bit and I think it is a perfect match for the QMX.? I thought they were discontinued...
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It's the Turnigy 9xR
?
3S LiPo cell, very small (approximately a stick of gum sized, a little larger), and it has a protection PCB built in to prevent over discharge or over current.
2.2AH of capacity, 3.3A max continuous current, 12.6v fully charged
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Can't argue with the price either at under $10
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--
John E Pokluda PE LLC Rotorcomp John E Pokluda PE - General Manager 26 Grove Street, Box 1743, New Canaan CT 06840 USA KC1VPP
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My 2 battery options for the QMX .. 3S or Anker 2000 pack with USB 12 vdc trigger
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The simplest way to sort out power for a QMX/QCX equipment for ever is to add a little module like this . You ?an select 9, 12, 15 even 20V and then use any USB C powerbank or a wall charger at home. I have built one such module directly into my QMX+ during assembly instead of the barrel power connector. A small 5000 mAh powerbank can take me trough a half-day SOTA activation and a 20000mAh one can supply even the 50W PA with 20V/5A. Another possibility is to make a power cable with such tiny module embedded.
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How do you power the amplifier? I'm guessing stepdown from 20 back to 12?
Do you have any pictures of the trigger board in the QMX?
The simplest way to sort out power for a QMX/QCX equipment for ever is to add a little module like this . You ?an select 9, 12, 15 even 20V and then use any USB C powerbank or a wall charger at home. I have built one such module directly into my QMX+ during assembly instead of the barrel power connector. A small 5000 mAh powerbank can take me trough a half-day SOTA activation and a 20000mAh one can supply even the 50W PA with 20V/5A. Another possibility is to make a power cable with such tiny module embedded.
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On Sat, May 3, 2025 at 07:43 AM, Jiri OK5WA wrote: The power bank must be PD capable, otherwise the default is 5V. I use an Aliexpress pre-built trigger cable. Vy inexpensive. 72 de va3rr
The simplest way to sort out power for a QMX/QCX equipment for ever is to add
a little module like this
. You ?an select 9, 12,
15 even 20V and then use any USB C powerbank or a wall charger at home.
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I use the same thing for my qmx but I was just wondering if the amplifier works off of 20 or if you step it back down.
On Sat, May? 3, 2025 at 07:43 AM, Jiri OK5WA wrote:
The power bank must be PD capable, otherwise the default is 5V.
I use an Aliexpress pre-built trigger cable. Vy inexpensive.
72 de va3rr
>
> The simplest way to sort out power for a QMX/QCX equipment for ever is to add
> a little module like this
> . You ?an select 9, 12,
> 15 even 20V and then use any USB C powerbank or a wall charger at home.
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Be aware that some of the newer power banks do not support 12V operation.
73, Don N2VGU
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The following INIU Batteries & Chargers all support 12V DC output.
BI-B5 Battery
Bi-B6
Bi-B61
Bi-B62
Bi-B63
AI-623 Wall Charger
BI-B64?
12 Vdc operation support is from their respective manuals.
You can search Amizon on these part numbers.
Manuals can ne downloaded from: manuals.plus?
I have several of these products and they work well for me.
73 Rick K8BMA
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I have been using 8 AA lithium cells for a few weeks now with my QMX+, with great success. The display always reads 11v. The batteries were purchased off Amazon.? I can't believe how I've been able to run the rig for weeks on a single charge! Outstanding little radio. There are still things I don't know how to do yet, but i love this radio. I especially love how I can just let it call CQ over and over while I lie in bed waiting for a response.?
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Or this one,?.
But what we really need is a usb hub which can supply pd voltages and pd currents and data to connected devices, or a battery pd power bank which also serves as a usb data hub.? The idea being that since usb can provide a data connection and a power connection, please make a device which does both at the same time.
This,?, does the job if you have a 110VAC outlet available.? I suspect that some thunderbolt docking stations will do the same, if you have a 110VAC outlet available.? But that's no use if you're trying to assemble a portable station -- what, bring along an inverter to power your hub/docking station so you can power your TX?? Nuts!
It's really very confusing.? If you have a battery pd power bank that supplies some complex menu of E=IR to its ports depending on which ports ask for what and what the power bank has to give, what does it cost to add data connectivity to the ports?? ?Adafruit sold me a four port USB hub on a break out board for $4.95, it's one chip and caps and resistors and pads to connect the ports.
They've made a major disconnect in building hubs, docking stations, power banks, etc..? The fundamental appliance should be a usb hub which provides a subset of usb 2.0, usb 3.0, usb 3.1, usb 3.2, display port, and so on connectivity.? ?The hub should have a power input connection which can be served by a GaA power supply or a battery (oh, maybe more than one such connection) and it should triage the power available across the connected devices.
Let me know if there are other existing devices which would work for this.? Finding the Mokin device was a magical mystery tour.
-- 73 -- rec -- ad5dz --
The simplest way to sort out power for a QMX/QCX equipment for ever is to add a little module like this . You ?an select 9, 12, 15 even 20V and then use any USB C powerbank or a wall charger at home. I have built one such module directly into my QMX+ during assembly instead of the barrel power connector. A small 5000 mAh powerbank can take me trough a half-day SOTA activation and a 20000mAh one can supply even the 50W PA with 20V/5A. Another possibility is to make a power cable with such tiny module embedded.
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I use the 20V to power the amplifier. I have started with 12V, then 15V and finally 20V and since my powerbank can handle 5A at 20V, I happily use the 20V all the time.
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Certainly you have to check whether the powerbank (or the charger) supports PD. Any newer thing claiming "fast charge" does. Only the 12V support is sometimes missing, that's why I have built my QMX+ for 9V and now doing the same with my new QMX intended for "ultralight" SOTA expeditions.
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newer power banks do not support 12V operation.
Absolutely. ? It is deprecated in the latest PD specs and many chargers no longer do it.
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Here's a self-built PD trigger cable using a module similar to what Jiri OK5WA posted above (I got the module on Aliexpress, I believe). Notice the white button. It allows you to toggle between voltages. There's a multicolored LED that flashes different colors depending on the voltage selected. That way, you can verify the selected voltage before hooking it up to the radio. The module Jiri posted uses solder instead of a button to select voltages. That's probably more secure (no inadvertent button presses), but also less flexible (no changing voltage on the fly). If I knew I wouldn't be changing voltages out in the field (or if I had multiple cables for different voltages), I'd go with the type of module Jiri posted.
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Pre-built cables are probably more expensive upfront, but depending on how you value your time, may not actually be that expensive at the end of the day.?
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I like power drill batteries, they are meant to be used on a building site so can be chucked in a rucksak without fear of an electric fire and last forever (not forever but I am bored of playing radio before the battery is empty).?
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I use a 12V makita battery, you can get an adapter for really cheap : ?
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I already had the battery, the proper Makita batteries are expensive but there are knockoff around I believe.
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Voltage starts at 12V then drop to about 10.5V. At the end you don't get full power but it doesn't seem to matter, your power is really clean for optimum reception and what is half a S unit when you are having a QSO ? I would rather have this than add the extra complexity of a boost converter. If you want full power all along, probably the best option is a 18V battery with a buck converter.
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73,
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Yannig - F4IUJ
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va3rr
Donald S Brant Jr
Braden Glett
Bruce Akhurst