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I advise against the little buck/boost converters currently available from Amazon and other places.? I wasted many days chasing intermittent problems on a U3S that all instantly went away when I

Just wanted to share what I ended up doing for my latest QDX build. This is the first of 3 I intend eventually to operate remotely and probably into a Hardrock 50, so reliability is key. I'm loving

I have been using a repurposed server power supply for my shack.? ?They are very cheap on Ebay. I bought three of them. think I paid $20 each.? They provide up to 55 amps of power.? ?They're

I have used the iFTx app along with a lightning connector to usb adapter to successfully operate FT4/8 with the iPhone and QMX.? The first adapter I purchased did not switch the audio path to the

I have used iFTx with success on a QMX with .17 firmware and adapter cables for lightning to USB camera?and USB to USB C to plug into the QMX. I put a clamp on ferrite on the QmX end.??You have to

Peter -- in that case, and assuming that the ProgRock2 hadn't been connected to anything else either simultaneously or previously, and assuming that there was nothing wrong with the USB port or the

There is an app called iFTx , but you have to pay for it. However, I ran into the usual Apple restrictions on data leads not recognised on my iphone/ipad. Best of luck. 73 Ken g4apb

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