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The easiest mod is to remove 2xBS170 and run on one BS170. QCX will be in QRPp range now with this mod. -- 73, Barb

Hello Chris I didn't have any plans for such a thing... the LCD_LED line is not connected to a Timer PWM output. Which makes it harder (not impossible); PWM'ing 10mA of LED would also inflict a

Question for Hans, are there any plans to be able to control the LCD display brightness in software?? Superficially it seems easy to drive the LCD_LED line with a PWM output which can be adjusted in

I have the same problem with a V2 QMX that affects both left and right encoders.? When turning the left encoder the volume level sometimes jumps many steps.? With the right encoder I have the issue

It also has the potential to be wildly misleading. 10dB may be one thing but if you go much beyond that, you will *think* you are really transmitting a certain amount of power, being your produced

Chris, With respect this sort of thing is good for black box users. But my feeling is that generating "vast" amounts of power then wasting it in an attenuator is not really true QRP. I think

Hi, can confirm this problem. My right encoder goes forward and backwards when turned slowly. The leftone is working precisely. Vy 73, Peter DL4PJ

Links to SotaBeams switched attenuator (switched in by relay on transmit/switched out when not transmitting, on

QMX observations FW 1_00_017 QMX covers the 80m-20m band, but I don't use the 80m band, so I chose it for the 40m-15m band. 1.Setting japanese limits to ENABLED. When transmitting at 17m and 15m BAND

I touched up the solder joints on all the LPF capacitors and toroids, and also adjusted the turns spacings on L401 to match more closely the photo in the assembly manual.? Reconnected the radio to

I agree that it is unlikely that Hans will want to find time for incorporate a reflectometer into the QDX with associated extra software in the controller.? Part of the problem is that, unlike the

Yes, that one had me questioning my sanity when I first connected the straight key. Ring is tip and tip is ring! :) 73, -Lloyd Sent: Saturday, February 24, 2024 9:13 PM To:

So, is this "resolved" or ?? TIA for an answer. es vy 73 de "baab" w9ya

Kjell, When I'm in a mood for QRPp, I haul out my Zachtek "Flea" transmitter and the ATS-25 general coverage receiver I use with it. It's only 300mw, on 20, 30, and 40m. It doesn't have to be that

Rather than try to add SWR protection circuitry, try protecting the BS170's: https://la3za.blogspot.com/2023/04/3-tips-for-not-blowing-finals-of-qdx.html I also added the zener across L14 for good

Dave http://qrp-labs.com/ultimate3.html Lots linked from that page. 73 Alan G4ZFQ

I am a nubie to the group so be easy. where do i find instructions for the above unit? dave k7da

Ludwig, Am I understanding that you were finding T37-17s to measure 25%+ high when you wound them? And your further work with T37-10s is validating your measurements? I'm working on a QDX HB, with

I once set up a BIOS EPROM to flash SOS on the carry light.? Well actually any message in Morse. Chris, G5CTH

Hans, I know upgrade is easy, I've done that before ;) Believe it or not, my (yes, MY) problem is, that PC I use on daily basis is unable to write USB drives. Can read but cannot write. Unbelievable?