开云体育

Yes, per Dr. Seuss... DaveD KC0WJN ============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================

Dave D., I assumed Bruces's comments were aimed at me. Yes, too many Daves. Dave E. - W?LEV [email protected]> wrote:

Uh .. which Dave? There are many....' DaveD KC0WJN ============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================

Bruce, I did not mean to be rude. I usually use the term "newbie" but worded it as I did to avoid rudeness. I've just viewed so many.,....many YouToob presentations which are just blatantly wrong

Good point ! I had not considered that.

Dave ? I'm not a newbie by a long way and as I stated earlier was first using professional spectrum analysers in VHF UHF comms design, manufacture and field repairs in the 1970's.? Doesn't mean

The Soundcard Scope oscillators feed the left and right channels of the stereo soundcard separately. I simply add them together with a resistive network, and it seems to work OK, providing I don't

http://www.qrpkits.com/files/TwoToneV3%20Manual_20240131.pdf [email protected]> wrote:

And Sine wave with low distortion. The qrpkits two tone generator is textbook sine wave using ne5532 op amps and combined with a balance pot. Larry KB3CUF [email protected]> wrote:

I thought that a true two tone generator require two absolutly independant audio sources to be present. If you took a software 2 tone generator, or a switched synth then at any monent in time there's

Thank you all for those suggestions, but the disparity between soundcards and their coarse adjustments would mean having to to set everything up again when I move between computers. I think that a

Bruce, "how do we know?" Some of us on this group and the NanoVNA group have done this professionally for decades. Sure, I'm completely against tooting my own horn, but I've been using both

It's no different with the expensive professional VNAs. Accessories are the key to far wider applicability and usefulness of the instrument. Just spend the few $$ and don't look back. The next time

I prefer the use of well defined high pass filters. Most basic notch filters also have notches at harmonically related higher frequencies and will mess up the test result. The loss of those harmonic

Take them apart, most 2w and below have a symmetrical T or PI inside. It is cheaper to make the part symmetrically using the same value components on the input and output? than having to inventory,

Here's another free solution: https://studio.youtube.com/video/owAksmp8TyM/edit (also works on Windows and Mac) M

There's my SweepGen Windows software, if that helps.... https://www.satsignal.eu/software/audio.html#SweepGen Cheers, David -- SatSignal Software - Quality software for you Web:

Not sure what you’re saying or how you know this ?

So far, all the cheap SMA attenuators I have are symetrical with the shunts equal. Size dictates so rather low wattage resistors though.

I think if it from China, I would question its power handling, I have an old Philco 30Db rated 50 watts, and handles that all day long with some slight warming.