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Preston wrote : "I am in a condo ... static ... periodic continuous tones" It could also be RFI from a local source. If you can power the rig (receiver only) from a battery, put a whip antenna on

Preston: There's an article (“ACheap and Easy BCI Filter”, CQMagazine,August, 2016) that describes such a filter. I built a QRP version for my 49-er that works quite well. It cost be about $0.80

Same thing from China via eBay for ?3.41 Inc free postage, just ordered one.

Indeed, if the AM station is on mediumwave a BCI filter (just a highpass filter) is the solution. I have had a similar issue with a religious FM channel I heard spread over the 144mhz band. A highpass

Preston, If it is indeed from a AM station I sell a BCI filter kit with instructions to install in the uBitx/Bitx40 radios for

I am in a condo in Scottsdale, and have tried my new Ubitx on a MFJ 1622 apartment antenna and on a 40 meter half wave center fed dipole.? All I am getting is static on every band with some periodic

Looks nice. Thanks for sharing. Robert NQ0T

Found this guy on amazon, looks like it was made for this case. The inkits provided knob is functional, but wobbled a little bit on me, and I really missed a finger

Yes it did. I read it last night. I believe the same info is on the qrp labs website in the qsx area. James

Hi Richard, I copied the whole thing from one of the ARRL Handbooks. I'm sure I can find it again. I will have a look. I do still have the T-R switch and maybe even the coupling capacitor. That cap

Didn't Hans QSX talk at FDIM and reprinted in QRPQ (October issue??) discuss a "relayless" TR switch? Jack, W8TEE

MFJ "Pin Diode Rig"....a model or part number?

There is this MFJ pin diode rig that I managed to pick up on ebay for $100. You might look around for another of those. They do take some tinkering I'm told. An even easier solution is to simply

Bill, do you have the schematic for the solid-state T/R switch, or even better, do you still have that switch? I am keenly interested in an all-electronic (no relays) T/R switch for QSK. Building

Hi Vic Where did you get this information from please?? There does not seem to be any other posts indicating version? 4.3, which I have, is different.? My radio "works" but has very low audio

Try swapping the Black, and Brown wires on the Volume control. Black to the wiper, and Brown to the hot end. Sunil's instructions are incorrect. Philip G7JUR

you can use any waterfall (e.g. FLDGI, or even packet sound card software) to do the same.

zl1rd, Most likely the problem is the BFO adjustment.? We would need more information on which model and what equipment you would have for testing. I personally have found a free Audio Spectrum

Hi John Wonder if you have solved this problem?? I just finished my uBITX and experience the same issues you have....? receiver sensitivity very low etc.? Would you mind responding to zl1rd@...

It caught me out too, audio not good, AGC not good so decided to trace wiring. What a difference it makes!!!! G4GPF