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Re: QMX and power bank PD
The 12.01V is safe. But are you saying that the voltage is dropping to 8.64V when you transmit? This is safe, and will work, but will give you lower power-out. How and where are you measuring this
By Stan Dye · #142929 ·
Re: QMX+ with 100 amp/hour lithium iron battery
YES! Mandatory. Roger 8P6RX ?Get BlueMail for Android ?
By Roger Hill · #142928 ·
Re: QMX+ with 100 amp/hour lithium iron battery
Yes you should limit the voltage to 12V. A buck converter or just simply put some diodes in series will do the job. -- 73, de BD8BTE op: Lun Yang
By Lun Yang · #142927 ·
Re: #qmx #SSB Firmware beta 1_01_003 release #qmx #ssb
In normal operation the modulator voltage seems to be 90% of the main power, does the modulator voltage increase above that for the peaks of SSB?
By Chris, G5CTH · #142926 ·
Re: QMX+ T507 winding direction?
If you use a binocular toroid isn't there also coupling between the two transformers?
By Chris, G5CTH · #142925 ·
QMX+ with 100 amp/hour lithium iron battery
Just about to finish my QMX+ build and I have a voltage question.? The kit was built for 12 volts.? I have a 100 amp/hour lithium iron battery for vhf base station emmcom backup.? At full charge,
By Jim - W7EZN · #142924 ·
Re: Here's hoping for QMX+ v2
Wow! I just remember seeing the 10,000 figure on a post some time ago. That is really an accomplishment! Jack, W8TEE
By jjpurdum · #142923 ·
Re: QMX+ MCU (? for Hans)
This type of request needs to be submitted to the support desk at qrp-labs, not this user-supported forum. Stan KC7XE
By Stan Dye · #142922 ·
Re: Here's hoping for QMX+ v2
Hi Peter, all
By Hans Summers · #142921 ·
Re: PA mod for QMX+
Tim, great idea re. the tab cutting. I have a couple of those upgrades lying around and will upgrade my QMX+ too. Will post pics and results when done. It will be nice to have a unit that isn't afraid
By Randy Paulson · #142920 ·
Re: Hand Mics for QMX SSB ? thank you all for the input.
Id like to thank everyone that took the time to answer my question regarding the QRP Guys mic. Larry NA0F
By Larry Christensen · #142919 ·
Re: Here's hoping for QMX+ v2
George, Would you mind sharing the info for the 140$ PC you bought? 73! de Bekir TA2RX 10 Nis 2025 Per 18:36 tarihinde George Korper via groups.io <georgekorper= [email protected]> ?unu
By ta2rx bekir · #142918 ·
Re: Here's hoping for QMX+ v2
I purchased an amazing $140 mini PC and use a USB cable. QMX + doesn't need a hardware change.
By George Korper · #142917 ·
Re: Here's hoping for QMX+ v2
I have to smile when I keep seeing requests for more power, surely the answer is in the name, “QRP Labs”. Notwithstanding the 10W and 50W add on amplifiers, surely the radios themselves should
By Rowan G0KLH · #142916 ·
Re: Here's hoping for QMX+ v2
I've had some discussions with Hans about what it would take to produce a very useful user-friendly digital communications "appliance" based on the QMX. I think that one way to implement this would
By Peter LaRue · #142915 ·
Re: Here's hoping for QMX+ v2
https://www.youtube.com/watch?v=QqMDmRqCZDI&t=3s This reminds me of what I did with my QCX.? If I had a top case with correct size hole for the display it would look professional, as is I have to
By Ron Carr · #142914 ·
Re: Here's hoping for QMX+ v2
Hi Jack et al Thanks OM, encouraging comments :-) I wouldn't be too concerned about Hans workload. Think about it. He has Gross underestimate :-) To be strictly accurate: 21,343 QCX-series (QCX,
By Hans Summers · #142913 ·
Re: QMX display unususal problem #qmx #dispay
Hello Marek, please read my post from a different thread. /g/QRPLabs/message/142910 Maybe there is a medium value resistance between neighbour pins. If you put voltage at this place
By @Ludwig_DH8WN · #142912 ·
Re: QMX+
Sorry, typo!!! Correct is 2 - 3, 3 - 4, ..., 14 - 15.
By @Ludwig_DH8WN · #142911 ·
Re: QMX+
Jim, so something was wrong in this area. Maybe you fixed not all. A missing connection is bad and also some unwanted connection between pins. Such an unwanted connection between neighbour pins may
By @Ludwig_DH8WN · #142910 ·