Hi Tim Thanks for the suggestions which are all very good... No no nothing is in jeopardy. The youngest lab tech here is 5.5 months. That means another 17.5-something years of mouths to feed. I

I would check the RX/TX mute switch, Q5 and C33 as that is how the receive signal gets to the receiver from the low pass filter. And although you say T1 is 100%, I wonder what would be the result

Hi Hans Here is a web link that you may be aware of: https://electronics.stackexchange.com/questions/200565/capacitors-for-ams1117-for-5v-to-3-3v-regulation 73 Jim On

Hello John, Have you measured the voltage at pin 11 of IC3, whilst in straight key mode, aka sending a constant carrier? 73, Roelof, pa0rdt

I think your number 5 should be number 1 then 2 and then new 1 again, and again. the excellent manuals are only any good if you read EVERY word, don't skim and then expect others to do

Hans, Thank you for your efforts and dedication it is greatly appreciated! 73 Rolf K9DZT

Hi Erich, May be a cold solder in BNC socket, just saying 73 de Andy F5TBL

Hello to all, I have been following this group for nearly 2 years now. I do not own a QCX. I’m interested in radio history and this group offered a good opportunity to follow the evolution (or

Hans, Thank you for your great design, your dedication to correcting faults - most of which are ours- and your honesty . In this case your openness and immediate dedication to solving the problem may

Don't be too stressed. I would guess most of us here have a $25,000 + vehicle that has had at least one recall for corrective action. I am sure that will survive a simple mod in a $55.00 engineering

Hans, I see you talent goes beyond electronics. Your post of the trials and tribulations that you are going through was both well written and amusing. I feel badly that you are dealing with the

Ryan, just get a few other 40m crystals for that pixie and a socket to be able to switch em out, worked great for me haha

Available in the US Digi Key:

Hi Steve Now LT1117 and LM1117 and AMS1117 and we are not sure of the equivalence... also isn't it another complication, that there is not an L-C filter driving the load - the L-C filter is only

Interesting article on transients causing regulator failure and preferred solutions. https://www.analog.com/media/en/technical-documentation/application-notes/an88f.pdf Note the requirement for the

I for one am just glad that there are no genetically engineered dinosaurs involved. Definitely some chaos theory going on here! Hang in there Hans. We're all for ya. Without you, we'd all be building

I simulated the circuit in LTSpice using an LT1117-5 which had a library part. I added the 470uF capacitor (C47) hanging on the 5V rail via 47uH L6. This has a large effect on the overall circuit

...because dear, we had 1,000 QCX-mini orders in under 4 days. And by now we have 1,300 orders in the first 2 weeks of December, compared to a normal order volume of around 500 a month, and a previous

On Tue, Dec 15, 2020 at 03:05 AM, Armin, DJ2AG wrote: avrdude -c usbtiny -p m328p .... is the way to go. I just connected my USBTiny to my (WIN 7) computer without any zadig changes and I got the same

Thanks Hans, After reading the earlier message from Steven K1RF I will sit in the wings for a few days and watch developments before turning on the soldering iron. 73 Brian G3ZOH