Sorry, but DC voltmeters still don't measure AC/RF signals. They measure DC, which is why they are called DC voltmeters.

Joe Looks like TX only? 73 Alan G4ZFQ

Hi Paul There are errors in this... you are mixing peak voltage, and peak-to-peak voltage. No... Vp / sqrt (2). The difference is Vpp (Vpeak-peak) and Vp (Vpeak). Vpp = 2 x Vp. No... again, this is

You mean the Receiver Module? I think this is primarily designed as a single channel receiver for digital modes. Therefore the response is restricted. It works adequately with 48ksps IQ sampling

Vrms = Vpp/sqrt(2) Vrms^2 = Vpp^2/2 P =Vrms^2/R = Vpp^2/(2*R) For a R = 50 ohm load P= Vpp^2/100 Same as you get if you use a DC voltmeter

DC meters don't measure P-P (AC) voltages.

On Wed, Apr 1, 2020 at 09:29 PM, alan bohne wrote My apology for the redundant text in prior email...did not realize it was there. I just realized one aspect of your concern about my FTT

Hi Alan Anybody using an oscilloscope to look at squarewaves on HF and expecting to actually see nice looking squarewaves is highly likely to be disappointed. For many possible reasons (grounding,

Allison, thank you very much for your response. I am unsure how to correct my setup per your comments, so I will try to address your concerns. There is no “programming” effort on my part; both

Jim, I ordered IC4 from Digikey along with Q6 which was shorted as well. The BS170's were backordered. I don't know if any of those are bad but why not have a few around just in case. Thanks. Should

George, Your email was truncated so I couldn't send you an email. John

No, Bernard is correct. The voltage he is measuring is made with a DC meter.

No, I simply plugged the line out on the board to the line in on my computer's audio interface. Are you saying that is not how this kit is intended to be used?

The QRP labs receiver board, of course. https://www.qrp-labs.com/receiver.html The 15 dB variance in gain, as stated in the body of the email. It's GNU Radio doing an FFT of the output. I'm not

Hans mentioned the other day about someday adding chimes to the shack clock and it got me thinking about it. I decided to experiment with the QLG1, an Arduino Uno clone, a sound board, an amplifier

I was able to get full scale deflection in forward on SWR Meter and it showed abt 1.5:1 in return with dummy load. This was a cheap backup cb meter so the value may be off a bit. I am charging

Steve, R1 and R2 sets the bias point, that propagates through IC4,and the rest. IF there is bad soldering [likely as its microphonic] start at T1 and insure it is both wound right and installed and

Phil, Did you load the transformers in their characteristic impedance? They do bad things with not loaded like become resonant. Allison ------------------------------- Please reply on list so we can

Your not loading the osc correctly and the Scope is seeing ringing of the coax/probe cable. The "contamination" is a measurement artifact of your test setup. If not, your programming is potentially

Which receiver board? What issue? Give us a little something to go on here. What receiver are you testing? What are you using to get the information in that screenshot? Where in the circuit are