开云体育

Way back in the 1980s we designed tune-able RF filters using varicap diodes driven by a DAC to control the frequency response.

The PC64904 looks a bit limited for many of our applications. The minimum frequency covered in the datasheet is 100 MHz and the capacitance range is only 1.1 to 5.1 pF. One plus is that it's specified

A very interesting chip, which acts as a digital variable capacitor, which can serve as a fundamental phase shift circuit. Wish I i had the knowhow to design !

Thanks, Dave.? I may try some other software other than HDSDR and see if that does anything.? If not, the 92 Khz I get with the Audiophile card will be sufficient.? I have the Behringer for sale

Hello again Joni, I am no computer guy, but I too once explored trying to get more than 92KHz bandwidth on my softrock display. If I recall correctly, the reason you cannot get that much bandwidth

Just about everything's working now.? I found some info on calibration and just doing "A calibration" is good enough for now.? Other than that, WWV finally came in better and listened to some ham

Ok, "unknown device" solved.? Found an old, unpowered hub I didn't know I had.? Plugged keyboard/ mouse into that and now no more trouble.? I must have used this ten years ago, or at the time I may

Thanks, Zack.? Well, I'm having the same thing right now!? There is a station booming in below WWV, but I can hardly hear WWV.? I ended up having to switch I/O for input which was causing most of

Conditions have not been great lately. I could barely hear WWV on 10 MHz in the afternoon yesterday. 5 MHz a couple hours after sunset was much better. 73, Zack W9SZ [email protected]> wrote:

Thanks, Dave.? Well, wouldn't you know that this old desktop suddenly went blue screen and shut down.? Upon booting, one long beep and no screen.? At first, I thought the video card, but no. A bad

Ed: I will wait to hear from you on the Odroid N2+ to make sure it also works properly. The Techrise is not a stereo input, only stereo output. The only option I have found for stereo input is mixers

Congrats Joni. We have all "been there, done that". As for the calibration.... you really don't know if the Radio Shack rig is off frequency or if the Softrock Calibration needs tweeking. Best to

Hi again guys, Well, get your 2x4's ready to hit me.? It apparently is just the 10' wire I have pushed into the unit for a temporary antenna.? I went over and over the settings again and everything

I have successfully set it up on several Win7 machines. I think I used instructions from WB5RVZ, Let me look around a bit. As for (3), the only way I know how to tell is to look at the board and

JonI, USB other than the Softrock. If I boot up with only the Softrock connected, it is recognized and then I can plug in my USB keyboard and mouse, but I can't have anything connected other than

I believe you can use PrintScrn or Alt-PrintScrn to copy either the whole screen or current window to the clipboard.

Hello again! Well, after having no luck getting the Ensemble RX II working in Ubuntu, I have tried to do so in an older desktop I had with Win 7. However, I am experiencing the same issues I had

Hello Howard, Nice to hear you again. I have ordered the Odroid N2+ , they will be in stock at the end of February. I am not exactly sure what your application is but for the Headset on my SDR I use

Ed: I will probably order the Odroid soon. They are out of stock at the moment. However, do you know of a USB audio device with a stereo mic input? Everything I have seen is mono. I did find some

I can provide fills between What Nigel has going back to 3/26/08 which is when I signed on to this group. It is in my Softrock mail folder in Thunderbird. I am a folder driven person and all things