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Yes, I have seen similar phenomena. In my case my CW wires to my key were too close to my 50 watt linear. Your tuner is probably radiating a lot of RF. Howard

Correction 500KHz span!

Hi Gwen, I had something similar on both SSB & CW. Part of my problem was my 3amp laptop power supply was shutting down. It reset the radio. I got a 5 amp power supply to fix that issue. After that, I

Akira, I just put my uBitxr4 on the spectrum analyzer and found nothing +-250 Khz. That is 500 Khz BW. I think your measurements are being affected by switch mode power supply in one of the items. Raj

Rick, If it's the PCB what about putting it below the ground plane in the same relative position as the suggested spot next to the RF relays? John KC9OJV

Hope this is an appropriate topic for the board. Just built he QRP Guys Multi Z tuner and hooked it up to the Ubitx.? The Ubitx goes straight into TX on power up.? I was very careful in building the

let someone from the competent radio engineers check my method and tell here for everyone if it works.

Richard, good afternoon! note, there are many people here who consider themselves radio engineers. but no one gives you advice on calibration. I'll try with my bad English to tell you how to properly

That looks neat.. -- Allen ?Merrell

Akira-san :? The uBITX display frequency in CWU/CWL is the RX frequency not the TX frequency. The norm in CW on most commercial rigs is to always display the TX frequency. You can however set the RX

learnt a point Farhan jee. Regards MVS Sarma

from junction r111/r113 solder a 1n4148 diode direct to the 12volt rail (LM368 is now alltime connected with 12volt) 73 elmar-dl2qa Gesendet: Sonntag, 01. Juli 2018 um 14:15 Uhr Von: 4Z1NT

John, Don, others, Yesterday I attached a 78L05 (TO220) directly to the back of the AGC board that is mounted to the RF gain control on the front panel. Bypassed all power leads and ran a separate

When you say solder 1n4148 t0 +12v not RX, which one are we talking about?

Hello Derrick, here is more info. please look at the picture . hope it is visible. if you have any question --give me a shout. Gesendet: Sonntag, 01. Juli 2018 um 13:52 Uhr Von: "Derrick Young"

Don, I spent part of yesterday applying ferrites to this and that to little success. I also tried wrapping the 5v line around the twisted pair coming from the volume pot and that did some good. This

Yes, more info please.

The firmware is still the original for the ver. 3 Ubitx

I usually use a Softrock Ensemble as the receiver for the Ubitx and other rigs. The CW TX in the Ubitx is 700hz off the actual frequency. I believe it was done by purpose although I would have rather

I had a similar problem where w1aw at 10 over would fade out to the point where I could no longer copy them on cw. Worked fine with headphones plugged. Replaced the 2 inch speaker and ok now. 73 John