Jerry, thanks for the response! I have an Icom 740, which is unable to tune to 11.997 HMz, but I am able to pick up the CW tone transmitted from the ubitx when tuned to the same frequency. Good news! In addition, I am able to receive with the ubitx the tone when generated from the 740. So I must be TXing milliwatts? My first thought would be to replace the IRF510s.
On Wed, Aug 22, 2018 at 1:46 PM Jerry Gaffke via Groups.Io <jgaffke=
[email protected]> wrote:
Since you can hear the sidetone, you have U1 working.
Some people have had trouble with the center pin of a coax BNC connector not connecting well
with the BNC socket provided with the kit.? ? Maybe go around that BNC socket somehow during initial tests,
or at least verify the center pin is making a good connection by using an ohmmeter.
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Does the receiver work?
You will need maybe 60 feet of wire out the window for an antenna before it will hear much.
Do you have some other shortwave receiver around, preferably one capable of receiving SSB transmissions?
With the uBitx, does this other receiver hear a carrier at about 11.997mhz when placed near the uBitx?
You should hear that during both transmit and receive.
Does this other receiver hear attempts at transmitting CW into a dummy load when placed near the uBitx?
Does it hear SSB transmissions from the uBitx when placed near?
Could be that the transmitter is mostly working, but the final amplifier is not.
Jerry, KE7ER
On Wed, Aug 22, 2018 at 01:16 PM, Evan Clark (OSC) wrote:
Hi all,
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I'm somewhat new but I've spent a lot of time looking on these forums for a solution to my issue. As a disclaimer, I started this project knowing almost nothing about electronics, save ohms law and the like.?
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When I first got my ubitx I plugged it in WAY before I ever should have, ie before I was even halfway done. This blew my U1, or it shipped faulty, either way that has been replaced. Now I have it at a point where it should be working perfectly but, of course, it's not. Connected to a dummy load and power meter, I get 0 watts out when yelling into the mic, as well as when shorting the key jack to ground. With the mic, it switches into TX and I can hear the relay click. When in CW, I get the click, it's switches to CW, and I hear the side tone. Still, no power out.
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I have a multimeter, but again I'm quite new to all this so use laymens terms if possible. Thanks!
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-Evan Clark?
