开云体育

What is input voltage, 12, 12.5, 13., 13.5, 13.8?

Did you connect raduino?

Hello, I just wired up my v4 ubitx board and it seems to work fine (still have to make a decent antenna). However, I notice that the current drawn by the board itself (no connectors plugged in) is

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* default_settings_ubitx.btx *Uploaded

Will any of these mods be incorporated into uBitx v4 or even a new version soon? -- 72 and God bless KD4EPG

Raj, Diane, and the group:? I got a better picture and annotated the signals.? You also asked if I could TX without any audio. So I just hit the PTT with no voice and got a picture. I can see a what

allison, i tried with just a regular 2n2222a in place of the 2n3904 (as per your recommedation). instead of the 220 ohm collector load, i used a bifilar transformern with the center tap going to the

i used a two section LPF, with a corner freq of 36 mhz. 47pf, 300nh, 100pf, 300nh, 47pf. the lpf had to be mounted away from the mixer to be clean. i dont know why. - f

Will this new discovery require any work in the areas that Allisons power flatten mod provides? changing the 6 3904’s and other related parts. Reason I am asking is I am about to do that mod (easy

All three local oscillators into the uBitx that determine the operating frequency are sourced by the si5351. And the clocks out of the si5351 are strict ratios of the 25mhz reference frequency So any

Here are some other softwares you can try. https://www.rtl-sdr.com/spektrum-new-rtl-sdr-spectrum-analyzer-software/

I’ve used my 100 watt radio next to a receive antenna for a rtl-sdr. I have fried am/fm filters and the sv1afn upconverter (a few times) but never the dongle. I have locked them up on the usb bus

Yep, this keeps coming up in different forms. I agree you need to attenuate your receiver because of overloading the receiver. You are showing a common overload image on a SDR receiver. With my SDR I

FWIW when I operate 20 meter FT8 with my uBitx the WSJT-X waterfall display clearly shows about a 200 Hz upward drift for the first 10 to 12 minutes after I power it on. I don't know how that would

Agreed on the front end of the hackRF - this one has already been repaired by me as a friend gave it to me and said, it's deaf - if you can get it going again, it's yours as I have got a new one! They

Further research reveals that this is some audio pop error that is fixed when TX is on, but when someone wants to practice morse, there's that anoying pop again. Reading through the forum, I found

Allison, a Mini-circuits "PHA-1" might do the trick. I don't have any though. I don't know how you would get on with it switching direction, back to the Rx side in the Bi-Amp arrangement. Somebody

Right now the 45MHz amp has a gain of about 17dB at 45Mhz and is 3.3dB down at 90Mhz. Total current draw in my proto build is 32mA.?? With? 3.1mA ? in the 1st emitter follower and 13.3mA? in the

Hey Nigel, what free Spec. Analyzer do you have? 73 Ken VA3ABN

Glen. Yes that the problem.? Or it could be that the two emitter followers are not following... Hint that circuit at 12Mhz works ok, at 45mhz no so much.? ?Compound amplifiers without feedback