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Hew VA7HU wrote... I still haven't wound any of the toroids yet, but I have the 80M version otherwise done and and I'm about 3/4 of the way through the 40M version. Which band did you go for? As

Hi Dave Have you checked for a short from IC3C pins 4, 10 to Ground? I agree, testing Clk2 when it is unconnected would be a good idea. 73 Hans G0UPL http://qrp-labs.com

Hi Dean It sounds to me that you probably fried IC4, the FST3253, which is the mixer (Quadrature Sampling Detector, a.k.a. Tayloe Detector). If that is blown, the op-amps would be just amplifying

Hi Yes, I can add that to the next firmware version - to only key in straight mode using the tip connection; then if a mono plug shorts the ring to ground, it would not cause a problem. I can add

Lets us know how the toroids go Keith. I got my kit last week? and just getting ready to start assembling on the weekend. I have printed the whole manual. 73 - Hew VA7HU

Hello Dean, If you think thats stupid. Try checking the frequency of CLK0 with the 12 volt pin on the three pin header. Instead of the freq. pin next to the clock. I would start with the mixer. And

Beautiful work, Nick!? Great job.? It looks very professional.? 73/72, Dean K5DH 20m QCX msn 612

OK, folks.? This is going to be the most stupid thing you've heard all day.? Maybe all week.? Or maybe in your lifetime.? Bear with me.? I have some 'splaining to do.? This will be a long

Actually, I am thinking this can be resolved in firmware: If you are running is straight key mode (Menu 4.1 Keyer mode: Straight), then the QCX must just ignore the ring or "Dah" input... Only when

I added a mono jack on mine or you can use a stereo to mono adapter like this (

It might be interesting if someone would write a set of test programs that supported individual function testing. In this case the code would activate only CLK-2 on the Si5351a and thus allow signal

Hi Robin. I have experienced this with other setups as well. A mono plug in a stereo socket will cause the ring and ground of the socket to short, thus keying a "dah". Its simple to a stereo

I have built #585 and the receive section is working along with the display and the sub menu items. The rig aligned as per the manual. The keyer and side tone are working. ? However, the

Ian, I did some measurements on my U3S with OCXO tonight. Calibrated a warm TS590S (TCXO) on air 5MHz and to my rubidium 10MHz to within 1Hz in WSJT-X. Condx bad for 30/20m beacons tonight. Listened

Shirley KE1L wrote... Thanks for the encouragement. I started with the 80M QCX. I hear those ones are easier to wind - hi! I think I'll wind the toroids for the 40M version first (half way done)

Dave G3WUN wrote... It started some months ago when I viewed a view videos that made hot air tools & SMDs to be not quite as difficult to use as most of us think they are. I went looking for an SMD

Good point Jim, I agree 100%. To: [email protected] Sent: Wednesday, December 6, 2017 3:55 PM Subject: Re: [QRPLabs] FT8 for U3? Come to think of it...this is QRP Labs and about the U3S

Come to think of it...this is QRP Labs and about the U3S kit.Lets remember what QRP is ... QRP operation is not 20,30.40.50+ watts like QSO modes are usually abused.When I say abused I mean 30+ watts

Hi Keith, There are about 30 SMD devices including two 8-lead ICs (not as close a lead pitch as the FST3253 as used in QRP Rx ).? R's and C's are 0805 , with four SMD can-type electrolytics.? The

Dave G3WUN wrote... http://www.multus-sdr.com/index.php?main_page=product_info&products_id=181 Just curious... are the the MultusSDR kits just the circuit boards and parts... i.e. you get to solder