开云体育

According to the documentation the 1st oscillator tunes from 45 to 75 MHz to receive 0 to 30 MHz. Since the oscillator is higher than the received frequency this inverts the sidebands. LSB becomes

According to the instructions and the parts list there is a 5 pin connector that attaches to the back of the Raduino, I have to wiring but there is no place to connect it on the Raduino. Has this been

Ok, checked out the BITX40 explanation, and clearly the uBITX is a completely different giraffe and requires different math. If someone even wanted to try to do that I'd be grateful. I guess I might

Well, you've gave me the Farhhan explanation at his site :??"To invert the sideband between USB and LSB, the second oscillator is switched between 33 MHz and 57 MHz. " But that's clearly not whats

Sounds perfect. Let us know when it's done, and we'll all pile on to criticize your grammar. Many thanks for setting up that website! Jerry

I hate sitting through videos.? The math involved is addition and subtraction,? no need to solve any differential equations. The 12mhz crystal filter has a 3dB passband of around 11.996 to 11.998

Jerry I decided to both amend the original story (http://ubitx.net/2018/03/01/tda2822-problems/) and add a news item about Raj's experiment

And first of all, this uBITX works perfectly. It sounds great. Its very sensitive and has good tone quality. Literature says this :?"To invert the sideband between USB and LSB, the second oscillator

I must be gettin really old. I read it and didn't even think twice about it till Jerry mentioned it. Vince.

Hi Graham, Have a look here: http://ubitx.net/tag/rd16hhf1/ Marco - KG5PRT

Hi.. Building up the UbitX. I am thinking of replacing the 510's with the RD16HH ' s . Does anyone have some tips on doing this?? Appreciate any tips on doing so. I do know the pinout is different...

Jerry Good catch...yes, I am an old geezer. Meant to say "emitters" but the fingers typed "cathodes" instead. Hopefully newer hams will understand. https://goo.gl/RwESgp Arv _._

I just have to chime in and let you all know how much I appreciate being able to see this type of dialog.? Every message a link to go read about, every part number a new thing to discover.? My uBITX

$9.00 each with shipping.

I've got a BITX40 that I got about 6 months ago and haven't had time to assemble yet, now I ordered (early Feb) a uBitx since I think it may be a better solution for backpacking with HF Still waiting

As per? ??https://ludens.cl/Electron/audioamps/AudioAmps.html You're dating yourself with that cathodes thing. But most of us are old enough to follow. Jerry

You can find 'em a lot cheaper here: https://powerwerx.com/anderson-1462g1-powerpole-mounting-clamp 3 bucks plus shipping,? about $4.50. Buy more save money. (That statement makes no sense!) Bill

Umm, yes. If you wire the phone jack such that the audio out is going to both tip and ring, then plug in a mono plug with just tip (and sleeve at ground), then the audio out gets shorted to ground,

Farhan Possibly use an op-amp for the audio pre-amp and follow it with an NPN-PNP pair. Feedback from the NPN-PNP cathodes to input of the op-amp (with resistive divider to set gain) and you have a

Ron N4RT http://www.hfsignals.com/index.php/ubitx-circuit-description/ Scroll to the bottom for the full schematic. Arv K7HKL _._