Thanks!

Glad you enjoyed it!

Hi Harry. I have an off center fed 80 meter dipole where I live now. I’m just using the internal tuner with it and it works fine on 80 through 10 meters. As long as your antenna system is 3:1 or better it should work fine.

Wow, thank you!

Thanks Steve. Glad you're enjoying them.

Glad you like them!

Wow, thanks!

Thanks for the kind words.

Thanks for the kind words Dwight. I'm glad you're enjoying them. I had some great mentors when I was young. So, I'm just trying to give back some of what I've learned. 73, Tom

@@HamRadioA2Z Well, I'm certainly not young, just new to radio. I appreciate the help so much as I don't have an Elmer to get questions answered... This hobby takes forever to learn without help! Thanks for being my "virtual Elmer'.. Heck we were practicing social distancing before it was a thing 😆

Hi Marshall. Thanks for reaching out. I’m glad you’re enjoying the videos. I’m pretty fortunate in that my wife (also a ham) is pretty supportive of the hobby even if she isn’t all that active. I thought I would reach out to her to get some advice for you. She said (with a smile) that you need to be able to answer the question “what’s in it for her”. 😉. Good luck and I hope you have a great Christmas this year. 73, Tom

Hi Richard. It's been a while since I checked the SWR of my antenna across every band. I've also done a few adjustments to it since the last time I measured everything. I'll have to recheck it and let you know. Right now, we're practicing social distancing in our camper, parked by our son's house in Arizona. So, I won't be able to check my antenna for a couple weeks. I can tell you that the 7300 internal tuner doesn't seem to cut off at exactly 3:1. I don't know exactly what the limit is before it stops trying, but it seems like it will at least try to tune in normal mode up to at least 3.5:1 or maybe 4:1. Testing that might be another fun video someday, but I'd want to use some "real" test equipment for that. 73, Tom WA2IVD

The AutoTune button is for CW. If the radio is in CW mode and you're listening to one signal, you can press AutoTune and it will adjust the receive frequency to put you exactly on the same carrier frequency as the station that you're hearing.

I’m glad you’re enjoying the videos. Thanks for the kind words. A dummy load does avoid any interference issues. Unfortunately, it would make it difficult to demonstrate the antenna tuner since it would always be a perfect match (at least theoretically).

Hi Robert. Check out Video #41 - kzfaq.info/get/bejne/qNCan5l7m968aKM.html

Hi. I’m not sure what settings you mean. If you connect an Icom compatible tuner, like the IT-100, the radio will recognize it when it’s plugged in and will automatically use the external tuner and disable the internal tuner. You can also check out the next video in this series about using an external tuner here: Icom IC7300 A to Z #41 Using an External Antenna Tuner kzfaq.info/get/bejne/qNCan5l7m968aKM.html

Hi Ron. It should work fine with the 7300. The external tuner interface is the same. I switch my MFJ939 between my 7100 and 7300 all the time.

Hi Dave. Thanks for the kind words. The answer to your question is: It depends. I wouldn’t get rid of your LDG just yet. The internal tuner in the 7300 will work with anything up to about 3:1 SWR. If your feed point SWR is higher than that, you will need an external tuner. I just put up an 80 meter OCF dipole and the internal tuner works fine on most bands, but it won’t quite tune the low and of 20 meters. So I need an external tuner if I want to do digital modes or CW on 20. Enjoy that new rig! 73, Tom

HamCuredSmoke thanks Tom just set up the icon 7300 today and your 100% right. Thanks for the info 73s

ah: ~@7:20 answered the question pretty well.

I don’t know of any way to make a shortcut for Emergency Mode. If your situation doesn’t allow you to put up a better antenna, the next best option would be an external tuner. If the internal tuner matches your antenna in emergency mode, the. Any external tuner should match it fine. You’d have the bonus feature of getting full power out of the radio.

@@HamRadioA2Z Again thanku With my 132 foot 80-10, I cannot tune on 160 with emergency mode, thus I was hoping the Mfj-939 would? Lastly, when internally tuning do I need to manually reduce power to 10 watts or does the radio do it automatically upon tuning? Thanks!!! William

Hi Robert. The EF53 does use a 9:1 unun. It comes with the antenna. I did not shorten the antenna. After several months I did lengthen it some. I also played around with various counterpoise lengths connected to the ground terminal. I don’t recall the exact lengths. This antenna does require a tuner and it’s important to pick a length that isn’t resonant on any band you plan to use.

You are correct. Good additional suggestion to point out.

Hi Theo. The problem is that 1% or 1 watt isn't quite enough power for the internal SWR meter to get a valid reading. 5%-10% is enough for it to read correctly. You don't need to go all the way to 50%

Hi. Sorry I missed this question earlier. The Auto/PTT options work the same way with the internal or an external tuner. PTT will cause it to automatically retune if the SWR is too high whenever you press the PTT button.

Touching the tuner button briefly will engage or bypass the tuner, indicated by TUNE on the display. The tuner will re-engage at the previous settings for the frequency you are on if it had been tuned within a few percent of that frequency previously. I don’t know if it will engage based on the nearest amateur frequency if you’re outside the ham bands. Even if you long-press the TUNE button, it won’t tune outside of amateur frequencies because it can’t transmit there.

Thanku. With the mfj 993 hooked up to the 7300, do I need to reduce power before tuning or will the 7300 do this automatically? Thanks William

Hi Brian. That is correct. When you press the Tune button to start a tuning cycle, the radio automatically sets the power to 10 watts and puts out a CW carrier. It doesn’t matter what mode it’s in.

Hi Troy. No you don't have to adjust the power. When you press the Tune button, the radio automatically transmits a solid carrier at about 10 watts. It does this regardless of the mode or power settings. It works this way with either the internal or an external tuner.

No it does not. Whenever you start a tune cycle, either by holding the Tune button for a second or automatically with PTT, the radio automatically transmits a solid carrier at 10W regardless of the mode or power setting. This is true both for the internal tuner and when using an external tuner plugged into the radio's tuner connector.

Hi. Thanks for the comment and I'm glad you're enjoying the videos. The TUNE indicator will appear red while it is trying to tune. Usually, this is just a few seconds. Once it has finished tuning, the TUNE indicator will be displayed in grey to indicate it successfully tuned or it will not be displayed at all to indicate it could not tune the antenna.

@@HamRadioA2Z Gotcha and thank you again. KI5FLE

Hi Tim. When I made that video we were living in a rental house in Olathe, KS. I had tons of local noise from the neighborhood and from the HVAC system and other things in the house. It could have been anything, but I'm sure it was local RFI and not the radio.

Yes & no. If your antenna SWR is 3:1 or less on the bands you want to use, then the internal tuner will work fine. If your antenna is worse than that, you will need an external tuner. Ideally, your home station antenna should be 3:1 or hopefully, even better on the bands you will work the most. However, not everyone has the space or HOA latitude to put up large resonant antennas. In those cases, a compromise antenna with an external tuner may be the only option.

Hi. That button is for automatically tuning in to a received CW signal. It is not related to antenna tuners or transmitting.

Hi Ken. The internal tuner does work on 6m. I haven’t tried Emergency Mode on 6m, but I don’t know why it wouldn’t work up there too.

No. It will tune on PTT with the auto setting.

Hi. That is not correct. If it can’t match an antenna well enough, the TUNE indicator will turn off, but you can still transmit. It will just fold back power to a very low level to protect the finals. If you see a dashed line around the TX symbol, it means that you are tuned outside of an amateur band. It could also mean that you are tuned outside of a user programmed band edge and that you have the inhibit transmit on user band edges option enabled.

@@HamRadioA2Z Thank you,That is what the problem, I turned it off and all good.

@@HamRadioA2Z Just for clarification, when I use the automatic tuner function by holding down the tuner button, the radio automatically send out a lower wattage to test the SWR, even though my power setting may be set at a higher wattage?

Oops, never mind, I see that you already answered this question in comment below. Thanks for the video!

Using an external manual tuner ahead of the 7300 internal tuner is an interesting approach. I’m assuming your question is will using the external + the internal tuner “hurt” the 7300? No, it won’t hurt the radio. I’m curious why you can’t the tuning to better than 2.5:1 with just the manual tuner. With a little more adjusting, you should be able to get it to 1:1 and not use the internal tuner at all. It doesn’t really matter. As long as you get the radio to see less than 3:1 into the manual tuner, then the internal tuner should get it the rest of the way down to 1:1. I expect that your total efficiency is worse going through 2 tuners. This is because the signal is going through more inductors and capacitors. Each of them will have some loss. However, it probably isn’t that much worse than a single tuner.

@@HamRadioA2Z My external ATU is an MFJ 941....some people say they are not great.....for everyday use mine is fine.....just this one band I cant get it less than 2.5 to 1. As an experiment I extended the antenna wires by 20ft each side with temp wire....1 to 1....but I cant leave it like that. Maybe my MFJ941 has a limited range. It a low freq on the 160mt band I am tuning. Antenna is a doublet. As with most things in radio.....depending who you ask you get opposite views.....I tend to agree with your view....using both ATU wont harm anything....but lots say dont do it. Thank you Tom.

Hi William. When I did that video, I was in a rental house and was using Princeton EF-53 end fed antenna. For a compromise antenna, it wasn't bad. I made quite a few contacts with it.

Hi. Thanks for watching. I showed how to program your call sign in the first video I made for this channel. You can find that here: Icom IC-7300 From A to Z - #1 Introduction, setting Bands & Modes & programming your own call sign kzfaq.info/get/bejne/o5poiq-hnJzZlWQ.html

Hi Theo. The manual recommends putting the rig in RTTY mode to check the SWR. AM mode will work too. In either one you will get a carrier just by keying the mic. If your in SSB, then there is no power output unless there is audio. As far as your different readings, 1% is a little too low for the SWR function to read accurately. You really need to have the power set to at least 10% to get a good reading. So, I’m afraid those good readings at 1% were just a false tease. Sounds like you might need to do some antenna work or maybe consider an external tuner.

I suppose it's possible, but my first suspicion would be RF getting back into the rig somehow and temporary scrambling it's brain and making it turn off. I would check the antenna setup, looking for good grounds, good connections, etc.

@@HamRadioA2Z thanks for the info but I found the problem it was the power so I'm getting the one I got last year fixed 👍

Hi Eddy. I'm not familiar with that mod. However, I suspect that the resistor modifies the SWR reading that the radio sees to make it appear lower than it actually is. When you start a tuning sequence (not in emergency mode), the first thing the 7300 does is to key the transmitter with the tuner bypassed and measure the SWR. If it is greater than 3:1, the radio drops out of tune mode immediately and doesn't bother trying to tune the antenna. The mod could certainly work and the tuner would tuner SWRs higher than 3:1 and operate at full power. Here's the problem-- The capacitors, inductors, relays and circuit board spacing for the tuner section of the radio have been designed to for some maximum RF voltage. When a tuning a high SWR antenna, very high voltages can develop across the tuning components. The higher the power, the higher the voltages will be. So you run the risk of arcing across the tuner components inside the radio. I'm sure there's some margin in Icom's design. The question is how much margin and how bad an antenna will the mod force the radio to tune. So, if you don't want to risk letting the smoke out of your rig, I'd stay away from the mod. 73, Tom

좋은 말씀 감사합니다. 여러분도 축복받으시기 바랍니다. 언젠가 라디오에서 만날 수 있기를 바랍니다.

I’m assuming that you’re joking. However, not as obvious as you might think. Normally you hold the Power button for 2 seconds to turn the rig on or off. It does have another function that you can enable in the settings menu. You can turn on the capability to capture screens on the radio. When this is enabled, a momentary press of the Power button will capture the current screen to a BMP or PNG file and save it to the SD card. Just search “Screen Capture” in the PDF version of the manual and you will find the setting option.