开云体育

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 _._

I got the heads up form PayPal that my uBit has shipped.? Ordered on Jan. 8,2018, almost 2 months to day.? I still have wire up the Bit40, plus other projects, I am probably the only ham that has

What's this reference? My guess is that they are telling you that in the bridge configuration of the TDA2822M where both halves are used out of phase, you must use a stereo jack to external speaker.

David, The message # for the problem with using a mono plug for the speaker is #42601 J

ST makes the 78L** parts in a SOT-89 package. Same package as U2, the 78L05 for the IRF510 gate bias. TI and Fairchild LM78L** parts only come in the SOIC-8 and TO-90 (also some dinky BGA that we

Hi David, I have the TDA2822M in mine.? I found a reference where they indicated that you must use a stereo plug for an external speaker.? I was using a Kenwood SP23 thinking quality but found it

""just a total malapropism (look that up!) WOW! How did you know i had to? It is a gift right? Is it because I'm Canadian living among the Ameriglish/Yankish? It is really no big deal. I make

How about the wiper of the volume pot? Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

For my part I'd be happy with the provision of an audio take-off connector on board. That way I can run whatever drop-in module or external powered speaker I like. Paul ZS2OE

Maybe Claude is your Santa: ? ??/g/BITX20/message/43156 The uBitx needs the extra gain of a 1uF cap between pins 1 and 8 as on the Bitx40. (The 0.1uF cap of post 43189 is likely

Thanks Satish, John and Arv. I did not have the BPF connected at the time of experimenting. But it would probably lower the signal even more. So it's best to get a strong signal before I attempt