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This reminds me of reports caused by RF (getting in the USB cable?), the QDX locks up. Is it a borderline case? 73 Alan G4ZFQ

I agree about pushing the power connection to the board edge. I did that and there's enough clearance not to need adding insulation. Otherwise what I did was to wind the toroids first and do a dry

One or two times per operating session my recently assembled Rev 4 QDX fails to return to receive mode after a transmission completes. I'm using VOX and currently don't have a good way to use CAT to

Hello, All— Is there anyone who knows how and would be willing to replace the Si5351 synthesizer chip in my QCX transceiver with a good one? I do not have the equipment or equipment to do the SMD

I tried powering the 3.3V line direct from my test power supply with a 250mA limit. Went into current limit immediately. Guess the CPU is slagged. :-( Still don't know what I did, either! Sad

why don't you just use one of the several BUCK converters that have been suggested on here over and over? That would GUARANTEE 12.0vdc into the rig no matter what your auto generator /

Mine varies slightly from band to band but the highest I've seen on TX is about 1.3A from a lab supply set at 9V. Jonathan KN6LFB

Hi Rich, I recently completed a QMX and have a USB powerbank so I thought I would give it a try.? The USB powerbank? I have is a PD type rated at 10,000 mAh 18W.? I have a PD "dongle" connected to

While I await delivery of my factory-built QMX (~110 on the wait list) I am wondering what the max current consumption might be? I've got a 10,000 mAh? 5 volt USB "brick", and I'm considering using a

Jerry, you should be able to setup 6 meters in the band configuration screen. 73 Evan AC9TU

LIN_REG_EN doesn't start at 12 V, it's staying at 0.7 volts, so the 3.3 V rail never gets power and the uP never starts. Pull up is working, no short to ground, on this line. See

Kees, I believe 470uF 10 V tantalums are also available in 7343, but are 1mm higher. -- 73, Dan? NM3A

Assuming that the hardware can work at 50 MHz, how will you change the software to enable 6 m frequencies?

Does the waterfall change if you disconnect the antenna? Are you receiving anything or just dead? Reboot the computer? Good luck, Mike N0QBH

sorry 9 for sure.? only have a 10mhz scope but the voltages on pcm1804 when splash screen is on are ok on pin17 and 18 but nill on 15 and 16.just checking this out now

Thank you for bringing up this topic so recently. I helped me in troubleshooting once I found my fried D101. The replacement on Amazon for me is 2 days, but its a good interim fix with the delay on

If you are really using 8, you should be using version 9,? Version 8 was quickly replaced due to issues.

*Thanks for your help. Will read hans link shortly, but yes i see 2 files one eprom and other ver8? software, but yes that happens every time there are 2 files and it lets me over write them*

Mike, check out this message from Hans /g/QRPLabs/message/105756, the firmware is not in eeprom but he does have some suggestions on where to look for this problem, maybe L402 47uH

Hans, I can add one tips: When installing the input power connector, push it towards the board edge. This will increase the very small clearance to the left encoder on the control board. Nevertheless