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Forgot to mention, both come with a power cable.?

Robert?

I have the following for sale,
QDX-Low. Rev 3a with QRP Labs enclosure. Works great, output levels 3.8 to 4.5 watts running on 9 volts. $80

QDX-High. Rev 5 with QRP Labs enclosure. Works well, 3.6 to 3.8 watts output except 15 and 10 meters which are running 1.8 watts out. Have not made any attempts to correct the low output. ?Also built for 9 volts. $75

Free shipping to CONUS via USPS. PayPal only ?

TNX,

Robert ?KR4VT

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On Mon, May 20, 2024 at 07:57 AM, Rowan G0KLH wrote:

I find winding the toroids to be one of the more ?relaxing parts of the build.

+1

You and me both.

Cheers -

Bruce K1FFX

One thing is different to former FW. Up from 018 I think the QMX did not start after copy FW in the USB memory. I had to remove the power supply. After connecting again start was possible.

After update 018 to 019 there was no selection of the band configuration. Maybe no factory reset was necessary.

73, Ludwig

Travel safe my friend...

73
James and Dawn?

Other than making my old man fingers ache winding toroids is easy, provided I don't get interrupted and lose the turns count.? But a pic with the I-phone can help with that.? The only rig I ever built that I paid for someone else to wind toroids was my K-2 way back some 22 years ago.

73, Bill NZ0T

On Mon, May 20, 2024 at 09:03 PM, Bruce wrote:

0.42 amps at 9 volts is the receive condition (Idle?) of the radio.

Bruce, tooooo much. Around 130 mA @ 9 V is ok.

screen dumps of terminal - Diagnostics

may provide some more information.

73, Ludwig

Thanks for the confirmation ??

Yes, it means you do NOT want a short there.? The Rev. 1 board was very close there and easy to short.? The gap has since been increased.

Ken

Ludwig,? 0.42 amps at 9 volts is the receive condition (Idle?) of the radio.? Transmit draws about 1.02 amps.? I measure about 4 watts, give or take my meter's accuracy!? I'll work on the dumps later today.
???? Bruce

Thanks very much, Ludwig.
-Bill

Looking for clarification on page 55 step 6 of the build manual where you are to install the male and female 90deg header pins.

At the end of step 6 it says that the pin "nearest the +12v pin of the dc power connector is NOT supposed to be connected ". Am I correct in assuming this means that it is NOT supposed to connect to the +12v pin? But IS supposed to be soldered to its own location in the main board? Essentially just meaning make sure you do NOT bridge across to the +12v. Thanks.

Yep. Ticket on for me also as I forgot to add the QLG3 to my QMX+ order. No big deal if I have to order it separately but would be nice a) to get it all together and b) to save on shipping.

Well someone has to say it .....how about "Let's Twist Again" by Chubby Checker!

Brian G3ZOH

On Mon, May 20, 2024 at 01:36 PM, Hans Summers wrote:

Hello Jim

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To be clear: QMX and QMX+ both run the exact same firmware. There's no difference except configuration parameters (the setup of the Band Configuration screen). Like we have 80-20, 60-15 and 20-10, now you will see "QMX+ 160-6m" and that will set up the Band Configuration with the correct settings for the QMX+.

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QMX has twice as many toroids. Which is a matter of patience, not difficulty. But other than that, QMX+ is easier to build because:

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1. A lot more spacious, less dense component placement.?

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2. I designed it so that there are no SMDs in the whole back half of the board where you solder the toroids and capacitors. So the soldering is easy and you don't risk damaging or dislodging SMDs.?

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3. The filters are symmetrically placed. All the diodes point the same way, etc. so it's easier to get it right.?

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4. Three of the band pass filter toroids have only one tap, not one large T50 toroid with 3 taps.?

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5. The toroid size for the LPFs etc is T37 which is easier to grip than the T30 size in QMX.?

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73 Hans G0UPL

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Now that is attention to detail Hans. Especially aspects such as easier to work with toroids and keeping the area of heavy soldering clear of anything else.?

I really enjoyed building the OG QMX but it was very fiddly. I'm hoping when the QMX+ I'll be able to do a really FB job and do a really nice build :)

On Mon, May 20, 2024 at 01:15 AM, Bruce wrote:

I forgot to mention that I do hear the sidetone on transmit.

Bruce, so we know the section from controller to audio out is ok.

Reading your post made some new questions:

Voltage/Current on RV (measured with external meter) 9V/0.42a

Could you explain please "RV"?
0.42 A in which situation, RX or TX?

Could you show please three screen dumps of terminal - Diagnostics, without a key, with key "P" depressed and with key "T". And please notify the current and the output for each.

73, Ludwig