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I made a no-frills keyer with only 3 standard CMOS ICs. See: Simple_CMOS_Keyer_HB9ABO.gif (732×469) (qsl.net) (

If one is to build a QDX-M for a band lower than 20m how should they set up the jumpers? Or does it not matter, as you can change it all in the band configuration in the Terminal program? (I'm

Ron,I built this one a few years back. It works perfectly. PIC-Keyer Overview | | | | | | | | | | | PIC-Keyer Overview Construction of a low-power morse-keyer with PIC

I had the same problem this morning, actually. I'm looking into increasing decoder speed any way that I can...I did find that I should not have had the AGC on (I did) and I should have had the audio

I've made an Iambic keyer using a Teensy, a sort of Arduino on steroids. As for shipping costs, for small things I use eBay's free shipping or Amazon Prime and go with UK sources, even if they are

Tayda Electronics has Nano clones that are top notch and low cost. I've used several of their parts. Jim, K8IQY

And for whom with out that dang ole toroid Or not want to fiddle with winding one Check out "THE"? GQRP Site The Resistive SWR Bridge Highly recommended for both beginners and experienced

I don't see how adding another SWR bridge will help things.? The QMX already has a SWR bridge, it can also control the Tx power, and all this is under the control of the QMX controller.? All the OP

I've had good luck with the Elegoo Arduino clones. Both Uno and Nano. I don't recall whether I used Amazon or AliExpress, but they work fine. They go into enough projects that I think I bought 3-packs

To echo Larry: I built a K3NG keyer based on an inexpensive Arduino clone. Easy to build, easy to program (the Arduino eco-system is targeted to a wide, non-techy, audience), easy to customize, works

Yes, my request is technically fulfilled by the Tune mode in the Hardware Test menu. Thanks to those that pointed out the existing feature. Also, as G0UPL and others have observed, the existing Tune

Be sure to also buy attenuator(s), since the SA can be catastrophically damage? if connected directly to even a QRP rig. I use a combination of a 10W dummy load with a built in 30dB attenuator

The schematic of the N7VE bridge is readily available from many sources. I used the one from wb3gck.com as shown on his Z-Match tuner; just implement the bridge portion if you want. There are several

aaz...OOPS K7DDC should read? N7DDC n3aaz

ps ... then the K7DDC ATU10 becomes the perfect match ...BUT?!!! CAUTION !!!? ?The SWR indicator must be in TUNE mode (NOT bypass) ELSE the ATU-10 WILL POP the finals? while doing it's

Too easy ""...(mini SWR indicator)...Or better yet make one, they’re very simple and low cost. Light weight, it won’t add any significant burden on your ?field operations.""...w6wu es have not

Would it be possible to turn the power down automatically as the SWR rises to protect the PA?? Maybe start at a SWR of 2 and reduce to the specified limit by 3. Restore the power, ideally slowly,

You can build around an Arduino chip or board, which you might get cheaper from a Canadian source for Arduino components? https://www.zs2ez.co.za/k3ng-keyer.html

I just read Frank DL2GRF's post and noted that we have a common issue, small component orders are eclipsed by shipping and handling costs. After spending some time looking for the once common

“ Often my antenna is a rather high Q base loaded vertical in which small adjustment to the coil position can result in big swings in feed point impedance.” If you’re concerned about protecting