开云体育

Hello - I am also getting error receive length = 1/1027. I have tried almost every possible combination of firmware and MM. I was successful with 1.097beta over the summer, then tried the I2C meter.

I noticed that too and I think it's just the first oscillator stage which runs constantly when transmitting.

I thought it wasn't used but had to ask the experts. Thanks

Keep us informed! Jack, W8TEE

That’s what foil is for

For $36 I think I’ll just use a metal enclosure, yikes.

Interesting stuff. A person in the comments of that Amazon link wanted to know if it would block wifi and electromagnetic frequencies if you sprayed it on clothes. Laughing my butt off!!! Joe Sent

John Beats me as to what you might be hearing. The lowest frequency made by the ubitx is 12 MHz. Okay possible that it might have some carrier leakage, way down there. Yes its possible you might be

If I were to "shield" the uBitx, I'd first be shielding the various parts of the uBitx from each other. For example, shield those high gain IF amps from the final amp. Putting it all in a metal box

The uBitx isn't designed to be used on 160. The LPFs are for 80 and up. Vince. -- K8ZW http://www.metalworkingfun.com http://www.hamradio.fun

I put a plastic case on my uBitX...but I sprayed the interior surfaces with several coats of a nickel-based RFI insulating spray. It's highly conductive, and I made sure to bond all the surfaces to

Jim, Does your lapel mike have a TRS (tip/ring/sleeve) plug or just TS(tip/sleeve). If just a monaural TS plug it is shorting the PTT lead to ground causing it to go into xmit. Just a thought. Also if

I didn't look on a scope, but could well believe that waveform given the harmonics seen on the spectrum analyser. Certainly needs some good filtering. No one should be using the uBITX on 160 as is. --

Yup, you need an external low pass filter if you want to operate on 160 meters. That should not be a surprise. See post? ??/g/BITX20/message/48125

Look at the schematic for the Bitx40. Long ago, the "Tuning" connector went out to a pot, was used to apply a DC voltage to the varactor diode at D9. But that analog VFO was not stable enough. The

Jim i would do some probing with a continuity checker (like your DVM) to see what is what with your construction.? if rig goes into transmit when plugging in your microphone, somehow it is making a

The spec's say that the Eventek switcher has "ripple and noise" of "0.5% V P-P", so 0.005*12 = 60mv P-P at 12v out. The MFJ4230MV has "ripple and noise < 100mv", that may be rms, definitely worse than

I am currently in the same situation. I have a simple lapel mic and every time I plug it in the rig goes into transmit mode, it's almost like there's a short. I've attached the diagram from the BitX40

If using plastic boxes or the like, you can line the case and shield in important areas with copper foil available quite cheap on ebay:

I hope that fine case maker in India comes up with a slope front case for the JackAl add-on with options for 5" or 7" display.? I currently have a plastic case uBitx and it works fine. -- Lee -