A new chat has been created: After aligning the my qrx the readout suddenly quit. All I see is two rows light blocks. Voltage can be adjusted from 0 to 5 volts. No shorts anywhere and all soldered joi

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Hi all, I've tried to listen on 14.074 MHz and I was unable to hear anything. So as a first approach to solve a possible hardware issue, I checked the voltages on the critical points pointed out in th

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A new chat has been created: I attempted to upgrade the firmware on my QCX 20m from 1.00e to 1.00f. I am using the instructions from "How to update the firmware on the QCX using an arduino uno and AVR

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Hi Doug, I will do some separate S11 measurements, make sure all is calibrated using my cal kit first. BR Andrew

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I have been on 7030 since 1300 UTC. Only faint indiscernible singals. Possibly SSB from Far East. Will keep trying. QTH California GL Brian N N7BKV

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Oh dear, not sure where to go from here corrupted or damaged pic, can you re-programme? Give a thorough visual inspection BR Andrew

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Hi Tristan There's a FAQ about that... http://qrp-labs.com/faq.html#fry 73 Hans G0UPL http://qrp-labs.com

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I would like my U3S to cycle through 1. 30,10,12,15,17,20 (relays are 0, to 5 in 0=30m, 1=10m, 2=12m, 3=15m, 4=17m, 5=20m, as 10m (highest frequency), must be in position 1. if I read this correctly.)

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Got the kit built up aligned and working. Was seeing a good 5 Watts out at 15V. However, I noticed some intermittency in the output varying 0.5 a watt or so. This morning I can’t get more than 1 – 1.5

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A new chat has been created: Anybody have a suggestion? I am out of ideas for troubleshooting my power amp. View/Join This Chat

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https://drive.google.com/open?id=1CSSM6IN-A7ZDdw5ijkrZiVAnKpd0qUSY PAM8302 2.5 watt Class D audio amp with IKEA plastic cup.

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Got 6 off RD16HHF1 from mitsubishi europe in netherlands. They are Genuine parts. I also obtained some from:- www.anglia-live.com This appears to be the sole UK outlet. There is a lot of discussion, a

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A new chat has been created: I had the same problem and thought it was the lack of a dot memory but was assured it had one. If you try and use IAMBIC B most of your problems will go away. Jim N6JF Vie

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Hi Stuart, The basic U3S is Tx only. You have to buy the receiver module and SSB polyphase module kits too and read the manual on how to link these modules with either the U3S Tx or LO module kits. Th

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Mario I would look carefully in the circuitry that keys the radio - possibly a diode is backwards, or a short circuit. I don't know if you wired up the GPS connection -- but it is a problem when you p

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A new chat has been created: hi all what is the full frequency range of the 40 mtr kit View/Join This Chat

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Mike, Do not mind about the board. Additional functions/devices are into sleep mode or disabled completely. If you can do this measurement, stick with relative measurements between the 2 firmwares. Sh

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A new chat has been created: GD, QCX 2017 / 2 #2306 - worked vy well with abt 3 Watts until .... In QTH TA3 2019 suddently no transmit. But not the PA Transitors (changed and OK). Today removed Q4 / Q

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Installing the LCD connectors into a transceiver PCB can be a little tricky. Here's a method to do it right with no problems. 1 put the male and female pin connectors together after removing the test

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Thanks guys for all those replies. I'll try on resolving those problems Thank you so much Have a nice end of the weekend!

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