Icom IC-7300 Tips and Tricks - Checking Your Frequency Accuracy with WWV
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- Опубликовано: 4 окт 2017
- If you suspect that your IC-7300 is off of the dial frequency, it is easy to check, and set, with your regional broadcast time standard. I am in North America, and use WWV in this video, but you could use WWVH, CHU or other shortwave time standards.
WWV on 2.5, 5, 10, 15 and 20MHz
WWVH on 2.5, 5, 10 and 15MHz
CHU on 3.330,7.850 and 14.670 MHz 
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One point you didn't mention is that you need to set your display to "Center Type Display" = Carrier Point Center ( abs. Freq ) otherwise the sideband will display off center and it gets really confusing very quickly. After I reset my display I was able to go back and follow your instructions - thanks for this great tip! My radio was off frequency by about 10%
You ROCK! Thank you for posting this excellent production.
Thanks, Charles! Now I know what you were trying to explain to me!!
Great easy to understand videos! COGENT informative - short, to the point. Love it!!! Thanks.
Very helpful and very well done. Thanks.
I would like to second that it is important to let your radio warm up for 30 minutes or more before doing this adjustment. Mine drifts a bit from cold to warm. My radio was not dead on from the factory. It was probably off 20 or 30 cycles per second. Thanks for the video!! Robert K5TPC
Absolutely excellent - well, except for the ever-present monday morning quarterbacks... One of my 7300's - I have 2 - was off by about 25 cycles, and I figured some exotic micro-miniature adjustment and exotic lab-type test gear was necessary - or an expensive trip to an Icom service center - but your fix was quick and simple - well, for anyone but the determined terminally dense... ;-)
So glad I found your video--- been using RIT like I knew what I was doing. Who am I kidding. Hahaha. Thanks a lot for posting this.
Very informative, thanks
Another good one!
Excellent video. Very informative and clear. Well done. Many thanks, 73 AG5GW
asesome.. im sure if i actually read further in the manual i would have seen that... nice to find... was a little out.
Thanks for the video, very useful.
One should let the radio to be on for a while before calibrating so that it warms up to normal operating temperature. This is important especially with older radios.
Also, RF gain control can be used to lower the level of time standard signal if that is too high compared to the marker.
That's cool !! Thanks !
Funny, that’s exactly how we (relatively) tune strings on a guitar…
I would recommend to warming up the radio before doing that... anyway thanks for vid.
great info btw what is the frequency i think you said MSF in the UK?vy 73 elan
Please help me connect the ic-7300 with log4om
de hz1dg
Should AGC be off for this?
Excellent video and of course Thanks for sharing.I have my IC7300 since December 2016 and been happy with it.I did that and it still is 100% correct.73 de SV1QZY
Did you hear that it is more than likely that the NIST is going to pull the plug on the whole Standard Frequency and Time system, LF on 60 Khz and HF too. Boy there is going to be a bunch of folks really mad when their clocks set WWVB stop operating so accurately.
The video is great, but another similar process makes the beat down to 1/10th of a cycle possible. Disable the AGC and the beat becomes easy to determine by just receiving the signal. Adjust the time constant of the AGC type you use least. I rarely use FAST, so my adjustment is "0" seconds. Now receive WWV in the AM mode and you will be able to discriminate down to Zero Beat.
BEST REGARDS
Steve, K2CX
Only for people with "by ear" sense! Question: is this setting for both RX TX?
Yes, the Ref Adjust is for the master oscillator.
Does anyone know if the ICOM 8600 has the same calibration feature?
Dan Robinson similar
Noticed your IC-7300's clock was about a minute slow.
Heck, you can find the calibration centre by listening for which ref adjust settings give you the same beat frequency and then setting your ref adjust exactly halfway between those two settings.
actually there is Icom software to kill the problem of the clock giving the wrong time
@@FredStam I just like to listen to WWV and set the clock manually from it. That is how I like to set it on my IC-7610. What Icom should have done is implement a feature on the 7300 and 7610 that would automatically set the clock based on the digital code from a shortwave time signal station such as WWV or CHU, or from an attached GPSDO.
Here are a couple more time and frequency standards:
China
BPM on 2.5 MHz 7:30-1:00 UTC 15:30-9:00 CST
BPM on 5 MHz 0:00-24:00 UTC 0:00-24:00 CST
BPM on 10 MHz 0:00-24:00 UTC 0:00-24:00 CST
BPM on 15 MHz 1:00-9:00 UTC 9:00-17:00 CST
Russia
RWM on 4.996, 9.996, and 14.996 MHz
Europe?
Spain
EBC on 4.998 MHz 10:00-10:25 UTC 10:30-10:55 UTC Mon-Fri
EBC on 15.006 MHz 10:00-10:25 UTC 10:30-10:55 UTC Mon-Fri
Finland
MIKES on 15.000 MHz 24 Hrs - Time markers only
There are others on VLF if you are interested
England
MSF on 60 kHz 24 Hrs
Germany
DCF77 on 77.5 kHz 24 Hrs
Hope that helps
Hi Greg. What BPM stands for?
@@diditpradipto329 BPM is the station call sign. Just like WWV is for the time station in USA.
Why don't you set your frequency at the desired frequency and tune? Why do you set the freq. off 1 KHz?
Because the rig's generated audio tone is 1KHz. The reference adjustment will zero beat to this tone. Hence - 4.999.000 offset in USB will generate a 1000Hz tone from the WWV carrier frequency.
Jim Ryan p
What guarantees that the marker frequency is accurate?
I don't know why no one has answered your question, but here it is. WWV is based upon the cesium-133 atom aka an atomic clock. The marker tone is highly calibrated and is used all over the world for navigation, mapping, and a whole bunch of other cool stuff. They've been continuously transmitting since 1919. Fun fact: the tone you hear every minute on the minute is at 440hz - A above middle C, which can be used by musicians to tune pianos and other musical instruments. Pretty cool, eh?
I've had quite a few radios over the years and my IC-7300 is the closest on frequency of any radio I've had. I'm going to leave it alone for now.
I wish my noise floor was that low
Not sure why you did that... it sure wasn't clear that the tone was zero beat... how close do you think it was, anyway?
Hi Bruce, sounds like he got within about 1 or 2 Hz. You can hear the very slow swoosh swoosh swoosh at a rate of about 1 time per second when he was at 27% (not easy to hear, but if you listen closely you can hear it).
I believe that my counter is plus or minus 1/2 Hz at ten megahertz, which would be closer than that. I think if he had backed it down to 26% that it would have been closer. There should be built in software to do that job correctly. This is not a good thing, as the machine is obviously settable closer than it often can end up being adjusted.
Sounded like it was almost dead on, maybe 1 hz or less to my ears. Really cool sound of the ticking, beating atomic clock !
MSF 60khz UK.
It hertz doesn't it! All your hopes ..dreams gone!!!
Johnny Hernandez Great movie..
Easy enough, but not very precise, especially with my ears. Why 4999.00?
for an $18,000 radio that thing shouldn't need calibration
1000/ 1200 dollars
"set your audio for a level that is comfortable", who knew?
Б#ять , когда же я найду нормальный Русский обзор. Дорогие Россияне , кто полностью разобрался с меню , поделитесь видео пожалуйста !!!😀
YOU MAKE CHANGES SO FAST ALL I CAN SEE IS THE SETTING YOU DIDNT CHOOSE. W4E DONT WANT TO BE IMPRESSED WITH YOUR SPEED, WE NEED TO KNOW THE HOW AND WHERE. THIS IS NOT HOW TO TEACH ON VIDEO. I CANT EVEN SEE THE RADIO WELL ENOUGH TO TELL WHAT YOU'VE DONE