Tag Archives: Videos

Bill tunes to WWFD in AM HD

Many thanks to SWLing Post contributor, Bill Mead, who writes:

Thomas, I’m sending you a short clip from WWFD 820 kHz in Frederick, MD. It’s America’s only all-digital station, apparently. They are HD only with a relatively eclectic music format. I’m hearing them at my QTH in Harrisburg, PA, about 80 miles or so north of their transmitter which is 4.3 Kw daytime. I sort of doubt they’ll come in at night when they drop down to 430 watts, but who knows.

My experience with HD on MW is that it can be heard at pretty decent distances under ideal conditions but the slightest bit of interference, a lightning strike or someone switching on the lights for example, and it’ll lose the HD lock.

My HD receiver is a Sony XDR-F1HD. It’s well-known as an excellent FM DX machine. What’s not as well-publicized is that it’s a very decent MW receiver as well. All it needs is a good MW loop antenna directly connected to the AM ANT terminals on the back of the radio.

Click here to view on YouTube.

Excellent!  Thanks for sharing, Bill. I’m passing by Frederick, MD in a couple of weeks and plan to tune to WWFD in both my car and with the Sangean HDR-14.

Video: N1SPY builds and describes the components of a simple receiver

Many thanks to Thomas Cholakov (N1SPY) who shares the following video where he explains how radio receivers work and builds a radio receiver:

Click here to view on YouTube.

As always great video, Thomas! Keep up the good work!

Ivan performs two tests with the AirSpy HF+

Many thanks to SWLing Post contributor, Ivan Cholakov (NO2CW), who shares the following:

Thomas, there has been a lot of discussions regarding Airspy HF+ ever since it came out – heated exchanges regarding comparisons with peers, modifications and firmware updates.

I took my Airspy HF+ and conducted two tests with it:

Airspy HF+ vs. SDRPlay RSP-1A on HF and Medium Wave

Click here to view on YouTube.

Since I could not completely equalize the audio levels, I think it’s good to look at the peak to valley ratios on the display rather than the audio volume.

Airspy HF+ with the R3 mod on and off:

Click here to view on YouTube.

This comparison used SDR #. It may be helpful to run the same comparison on SDR Console V3. I may do that at a later time.

Both tests used W6LVP’s portable amplified receiving loop antenna in a noisy suburban backyard in Florida.

Many thanks, Ivan, for sharing these comparison tests! I agree with you that it’s most helpful to look closely at the peak to valley ratios on the spectrum display rather than using the audio levels as a measure.