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Joan, I would also like to try iPhone! 73, Bill

Hi there, Do you guys have found a way to do digital modes (FT8 / FT4) with the QMX and an iPhone, keeping the footprint at a minimum? What application in your iPhone are you using? Even though CW

hello all,,? Luc? when is the next QCX challenge? Scotty? ?Gi0bey

Yes I had the same assumption but wanted to make sure.

Jim The Ripple voltage for a simple? non regulated circuit? as long as The DIODE Bridge is FULL WAVE Then ac input the rectifier is? 60 Hz is? ?Vr =? 0.0024? x? Vpeak/ RL CF where? RL is

For those who are wondering? , this is the type of supply that? JB is considering - https://www.farcircuits.net/kd1jv%200-14v%202%20a%20ver%202%20power%20supply.pdf It's a fairly basic design by

I had the same problem and refitted the IC and installed the diode. Despite the diode, the QM went deaf again after some FT8 transmissions. ??

Thanks much for the answer. Yeah, I finally got it working earlier today myself ! IMPORTANTLY : There is at least on step for (some/a-few/at-least-my-moto-phone) androids that I cannot find any

The main question Allison is do you agree with the splitting of the second feedback resistor as I did to do the maths.? ? Indeed for the? AD 8009 the datasheet? recommends? about a? 50R resistor

Thanks Dean ! OK, it sounds like a linear supply is the way to go.? I have the parts to build one with the possible exception of high capacitance filter caps.? ?How large should the filter caps be

Hi Baab, Firmware 017 works fine for me on FT8CN 0.92. I'm using it right now and it has transmitted just fine many times in a row. I don't recall Hans mentioning fixing anything related to this in

Thanks Dan, I will double check those things.Doug. WX7J?Sent from my T-Mobile 5G Device

how many amps should the diode be able to handle? My regulated power supply shows about 0,8A during transmit on 40m. Is a diode with 1A rating sufficient? 73 OE6HKE

There are some good quiet switchers out there, but there are a lot of noisy ones as well.? You'll never go wrong with a linear supply.? They are inherently quiet.? You won't need to mess with any

Doug, those pads are reserved for the TCXO board. The fact that the noise decreases when you touch them is an indication of something. Just not sure what. It could indicate a bad solder joint on a

Thanks for your reply Ron. It doesn't seem to make a difference.?Sent from my T-Mobile 5G Device

Doug, I see you installed the AGC option. If that is turned on, try turning it off and see if it makes any difference... Ron

Dan, I only notice it decreases when i touch the empty pads next to the 27mhz crystal.? Did i not install something i should have??DougSent from my T-Mobile 5G Device

Hi Steve - it was just powered from the PC via the USB port. Peter

Doug, do you notice any increase in volume of the noise when you touch the case or other object, like the key, that's attached to the QCX? -- 73, Dan - W2DLC