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Do you still use the WWV, WWVH or WWVB standard time and frequency stations to check or calibrate the frequency of your ham gear?
Posted: Nov 24, 2009 (574 votes, 13 comments) by VK5LA

Survey Results

Yes.	67% (383)
No.	15% (88)
I use a GPS disciplined frequency source now...	2% (14)
I use other methods...	5% (28)
I never bother to check...	8% (48)
What's WWV?	2% (13)

Survey Comments

calibrate WWV
Use it to set the sound card for MMSSTV. In early day was only way to get accurate frequency at McMurdo Station using the LF receiver, URQ-10 freq standard and the chart recorder... Posted by WB7OND on November 27, 2009
K3 calibration
The Elecraft K3 features calibration capability to within the 1 Hz frequency resolution of the display, and I use the method described in the manual to check and adjust mine once in a while-- I use the WWV signal on 10 Mhz. Posted by NI0C on November 25, 2009
CHU
CHU moved from 7335 to 7850 kHz on 1 Jan 2009. Posted by W3MR on November 25, 2009

Signal generator that does a lot more than a frequency calibration.... Posted by WW5AA on November 25, 2009
How to Calibrate Your VFO Accurate to 1Hz With Frequency Standard Broadcast
The following methods enable accurate field check of receiver and transceiver calibration on receive, within 1 Hz by ear, without the need for special RF equipment. Go to this website: http://hflink.com/calibration/ METHOD #1 may be used only with HF SSB transceivers or receivers that have variable selectivity filters, passband tuning, IF tuning offset, or Twin Passband Tuning. Many modern ham radio transceivers have these features. METHOD #2 may be used with any HF SSB transceiver or receiver, but it requires a second shortwave receiver capable of AM reception. This method is the most accurate. Posted by KQ6XA on November 24, 2009
How to Calibrate Your VFO Accurate to 1Hz With Frequency Standard Broadcast
The following methods enable accurate field check of receiver and transceiver calibration on receive, within 1 Hz by ear, without the need for special RF equipment. Go to this website: http://hflink.com/calibration/ METHOD #1 may be used only with HF SSB transceivers or receivers that have variable selectivity filters, passband tuning, IF tuning offset, or Twin Passband Tuning. Many modern ham radio transceivers have these features. METHOD #2 may be used with any HF SSB transceiver or receiver, but it requires a second shortwave receiver capable of AM reception. This method is the most accurate. Posted by KQ6XA on November 24, 2009
WWV Standard Freq/Time
I use WWV to calibrate my PC's sound card for SSTV. The SSTV software I use (MMSSTV) employs the WWV signal to calibrate out picture slant due to sound card clock error. 73, Rick, WA6NUT Posted by WA6NUT on November 24, 2009
WWV Standard Freq/Time
Double ditto. I often use WWV to start our local nets. Some people can be a little picky if you don't start "right on time". Example, 10 seconds after the top of the hour I'd hear: "is there supposed to be a net tonight?" :-) Posted by KG6WLS on November 24, 2009
WWV
Rubidium standards are relatively inexpensive now, often under a hundred dollars. It's handy to have something that's good to one part in 10 to the tenth power right in the shack. Soon mine will be controlling an SDR. If WWV is unusable due to propagation, or GPS doesn't work for some reason, the rubidium is self contained and is more accurate than needed. Why? Just because I can! Posted by W1ITT on November 24, 2009

I use them for propagation and time information, but only very rarely for frequency, and not on a regular basis. Posted by K0RGR on November 24, 2009

Yes, ditto to everything K5EST said below. I don't use these resources a lot, but its nice to have them available for my occasional use... frequency, time, and propagation information. ... de Ed K7AAT Posted by K7AAT on November 24, 2009
WWV, WWVH or WWVB
Easy way to check propagation, get the correct time, get marine WX notices, calibrate equipment, and solar info. Also CHU/Canada on 3330 kHz, 7335 kHz, and 14670 kHz are available for use. ....de K5EST Posted by K5EST on November 24, 2009
WWV Standard Freq/Time
Lacking expensive frequency calibration equipment in most shacks, WWV standard frequencies of 2.5, 5, 10 and 15 MHz signals are the best alternatives for checks. These signals are very accurate indeed. However, in South East Asia (SEA), interference from BPM(China) is prevalent at these frequencies. One has to be patient to wait for favourable propagation for WWV into SEA to take advantage of the modulated audio frequency data. Posted by 9M2YP on November 24, 2009

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