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My SDR shows my BITX40 signal looking more like AM. Has the carrier and USB when it should not. The USB does look weaker than the LSB that's actually supposed to be there, but still way too strong.

Jerry, I agree with what you have written and detailed. The transmit spur varies with frequency. Away from 7.2MHz it is outside of the band. Feeding the Raduino into the disabled vfo is not optimal as

No apology necessary, David. I just need to use my eyes the way they were meant to be used. Link showed up fine. - Rich

Just took my relays off in 20 minutes using a ECG J-045-DS Electric Corded De-Soldering Iron, 420 Degree C Tip Temperature, 45W From Amazon. Didn’t even need to clean the holes 73 Art

I've used the GC Electronics 12-2157 desoldering tool for a number of rework jobs, and it's always worked very well. I have not yet desoldered the relays on my v3 uBITX, perhaps this weekend if some

Using a toothpick to open the holes is a great idea.? -- Lee - N9LO?"I Void Warranties"

Link?

Regarding the Bitx40 spur, I previously wrote: It's possible that a low pass filter on the VFO is sufficient, allowing through 4.8mhz but not the harmonic at 19.2 mhz.? However, the diode ring mixer

There is a way in which the Bitx40 can produce a spur, as Brian reports. Look over the last few posts in this thread: ? ??/g/BITX20/message/21998 The thread has to do with images

In Europe the birdey on 7.2Mhz is a nice end of band signal? Rob

It was a? very easy swap with the relays. They came to me im Europe from Alibaba in 3 weeks 18$ for 10. 5 for my friend. Taking the old ones out with normal solder pump. Just one of the old relays

Don't say that John. It was never our intention to spam him. Perhaps he is impatient that Ashar Farhan did not reply to his query, but all others. After all he is also like all of us. I was dam

FolksAs you modify these PCB's to correct spurs and such remember; Adding new?PCB's and or daughter boards often inject new noise sources.and may disrupt existing signals.? Placement? and integrity

All good info, I did not wish to stir up a hornet's nest.? Remember this rig is not produced by a full-time, for-profit enterprise.? Please respect the efforts by lots of people world-wide as we

I have double checked the connector... I'm confused... Doesn't take much to do that. ________________________________ Sent: 05 December 2018 00:38 To: [email protected] Subject: Re: [BITX20] UbitX

I had a couple of QSOs on 7.177mhz looking for QRP. None of them was. On 7.277 there were only strong AM stations at least here in the Euro side. To be on the safe side a General should call at 7.178.

I suspect that RF is getting into the base emitter junction and causing problems.? The preamp was designed to be located inside of the microphone with nearly zero lead length between the mic

As for older boards that need relay replacement I have to say they were all but an easy swap. Using just a solder iron, copper braid and a pump I could not remove any of them. They were useful but not

Brian, So when operating between 7.1 and 7.3 mhz on the Bitx40 we have a transmit spur at 7.2mhz? That would be weird, especially if the spur didn't move as we tuned across that range. The receive

Bret try ubitx calibration or zerobeat into search engine, that should take you to hfsignals page. My bfo setting was way off, I needed a clue on it to get it close enough to align. If you happen to