QRZ Forums. Please help me understand a pair of meter settings on the They are both well into the red, at watts out. The VD meter, however, never leaves the red on transmit.

Should I be concerned? Can anyone expand on what these mean? The voltage should be as close to your input voltage The current is showing the amount of indeed assessment scores proficient the radio is using for transmitting. The specs say 21A max. Perhaps your power supply is set to too low of a voltage, and might not provide enough power.

But if the voltage is lower the current goes up to get the same power. You should be at What is your power supply, and what are its specs for continuous output? K0OKSFeb 6, Power supply is a Diamond linear GSV Power output is well within voltage range, and is outputting correct voltage, per meter. I am not sure of exact output, but meter has it dead-center on the dot, where it's supposed to be, on the diamond meter, using the preset notch in the dial -- If I remember correctly, my Elecraft radio gave me a reading of There are actually two meters that read VD.

That meter reads perfectly acceptable voltage, dead-center between red and 16v, with very little drop when transmitting. The meter I'm talking about is the one to the left of the frequency reading, which you can switch by touching it. Last edited: Feb 6, You know, I may be over-thinking it. I think, since those meters are dual-purpose S and ID, or S and VDthe red part is actually only for the S-meter part of the meter, maybe? How many V represents each bar on VD Screen?

icom 7300 s meter

PY2CPDec 14, What I'm puzzled about is the drain current indication I d. The scale is divided by dot symbols in 4 sections which represent 5 A for each sector.

So from one dot to the next one it should be 1,25 A,right?This is unnerving when I try to compare my local noise floor with others who claim noise levels many S units below mine. I recently reinstalled PowerSDR and recalibrated the receiver amplitude. These are some screen shots showing before and after calibration, and at the end a comparison with an Icom radio hooked to the same antenna.

All the PowerSDR readings werre taken with the same receiver settings. The mode was set to AM and the filter bandwidth manually set to 2. In PowerSDR the S-meter reading is based on the total power within the bandwidth, so a narrower bandwidth will show a lower noise floor than a wider one.

IC-7300 S-meter calibration accuracy

First, the display before calibration, first with a 50 ohm dummy load and then with a dBm signal applied:. You can see that the meter reads about 6 dBm lower than it should. I can correct that by using the PowerSDR calibration routine that uses an external signal generator to calibrate the receiver chain.

These are the results after doing that:. Now, the S-Meter shows exactly the signal generator level to be exactly dBm, and the noise floor has gone up by 6 dB as well. Now the meter shows dBm and S6 to S7, and again that tracks the Collins standard. The noise floor shown on the spectrum display has gone from about dBm to about dBm. That explains the very low noise levels this radio tends to report. Your email address will not be published. This site uses Akismet to reduce spam.

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icom 7300 s meter

There's a nearly universal standard to use red…. I've been looking for an antenna switching solution to use in my new ham station. I have several antennas for…. Each year at the Dayton Hamvention, the folks at Mini-Circuits have a bunch of odds and ends they sell very….David, G0MRF, provided the following assessment of the Icom after being modified for use on meters.

He was kind enough to send these details and allow me to publish them so that others might be able to make an informed decision when faced with the purchase of a rig for use at kHz. Mainly to experience the SDR aspects of the radio, but also to see how it performs on m.

My local dealer was more than happy to feed me a cup of coffee while his engineer removed a couple of diodes to broadband the transmitter. After a few days of informal testing, the results are an interesting mix — Which is to be expected as the radio was never designed for transmitting below top band. All IC radios may not be the same as this one. Transmitter: The transmitter, once broadbanded, operates nicely down to about kHz. The RF output does needs a dedicated low pass filter as the 3rd harmonic is only 18dB down on the carrier and everything up to the 5th harmonic exceeds FCC limits.

I compared the receive performance on kHz with kHz using CW mode and a 1. Sensitivity: The radio appears to have a 7dB higher background noise on m when compared to kHz. The reason for this is not immediately clear but it does mean that to overcome the extra noise the input signal must be 7dB higher than on top band. After some calibration and checks on the AGC action I decided to measure the signal level necessary to produce an audio output that indicates dB on SDR sharp.

A difference of 17dB. Observations: 1 The receiver is around 17dB less sensitive at kHz when compared to kHz. This is consistent with the 18dB difference necessary for indicating S5 on the signal meter.

Is the IC the ultimate answer for a commercial radio that works on m straight out of the box? Clearly not. The receiver requires a reasonable preamp to make its sensitivity comparable to many 20yr old radios.

I get the feeling that the transmitter really does want to work on the band, but some little detail in the protection circuit is holding it back.

A simple meter loop: a receive antenna implementation described by W5DFN. A simple antenna dipper for 80 m - m and possibly also meters. Menu setup for the TSSG for use on m and m digital modes.

A meter transverter, amplifier and switching arrangement by Wayde, K3MF. Problems with RF triggering alarm systems or fire suppression systems at your station?

WB4JWM meter non-linear amplifier. Beware of modifying amateur transceivers for kHz or kHz! Guy ropes and rusty tie-off hardware don't mix! KL7L discusses short verticals and tuning aids in a new Youtube video. What happens where on meters? A few more comments about where to place your signal depending on mode. Trying to figure out how to measure the EIRP of your short vertical antenna?

Here's how! Building from the junk box. Why we like to stay away from stainless steel hardware in RF applications. I want to build a new transmit antenna but how do I know how much power I need to make the ERP limit?

The E-Probe: a compact yet very powerful receive antenna. A simple commentary on power combining - or - how to get about 3-db more from low-cost amplifiers.Hi and welcome to this review for ICQPodcast of the hot item all have been talking about for the last couple of months.

This audio review cannot show you the rig and all of its features however there are many videos and technical documents on the Internet that can. Simply search in your favourite search engine for IC My review is about how and why I chose to buy this rig and what my initial thoughts about it are.

As is the case with all equipment described on ICQPodcast we buy the equipment outright and reserve the right to give our honest opinion of the equipment, without having to consider how a dealer might feel about a review. About five years ago, I returned to the Amateur Radio hobby, having been away from it for over 35 years. I had used a friends SDR rig while in Australia and the receiver performance had impressed me, however how good an SDR radio was depended upon how good the PC it was attached to was.

Specifically how good a sound card the PC had attached to it was. There were many interconnecting cables to multiple boxes to produce even just 10w of output. So even the very good but rather expensive Flex range of rigs would not fit my criteria.

Then the prices came out and the UK price was the same as the US price with the price in Germany only a little more expensive. Before placing an order, I went through all the specifications that were now appearing on-line and found that there were three main versions of the IC — one for Japan, one for the US and one for Europe, with some extra changes to meet some regulations in Spain and Italy.

Further investigation showed that the European version would come with coverage of the 70MHz 4 metre band, which the UK and several other European countries have and Germany has had for two test periods so far. Apart from the ICOM IC, no other current rig from the major manufacturers covers 4 metres and its a band I am interesting in trying out.

I found this situation strange and wondered what would amateurs do in the UK where both bands are in use. Then started the wait — with an unusually high demand, ICOM were having difficulty in supplying enough IC rigs to meet the demand.

So, what about the rig itself? As I said earlier I can only tell you which features I like — for full reviews or all features, I suggest you search YouTube where there are some very detailed videos on the IC The rig is FAR smaller than I expected.

Even though I had the dimensions, how small the rig actually is amazed me when I unpacked it. I am thinking of the IC as base station, but it could also be used in a mobile installation without any size issues I think.

The unit is a mixture of conventional controls and that 4. You can however store standard replies in the RTTY memories and select those to be transmitted in response to an incoming call. I have built one of these units and have included some pictures you can see in the show notes for this podcast at icqpodcast. That same external keypad can be used for sending pre-recorded voice or CW messages as well. The combination of a waterfall display and the touch screen, make it possible to look at what is active on a band and where there is a peak, simply touch it and the rig will tune there.

You can also tune there using the normal tuning knob. The important difference with the SDR type of radio when compared with a conventional radio is that the SDR listens to all signals across a band of frequencies, all at the same time, where a conventional receiver only receives on one specific frequency that it is tuned to. Being able to view a complete band, allows you to see where activity is in a quiet band and also the contrary, shows where a clear frequency is in a full band.

The inclusion of an SD Card slot in the front of the rig you supply the SD Card up to 32 GB in size brings several features, the most obvious one is that you can record the incoming transmission that you are listening to. You can also use the SD card to hold a screen short of what you can see on the spectrum or audio scopes. I bought a 16GB one, which seems to be more than adequate so far.I made tens of thousands of QSOs with that radio, and in all that time, the only problem I ever had was with the automatic antenna tuner.

And even that turned out to be a non-problem. I purchased this radio from a friend of mine who was upgrading to an IC He gave me a very good deal on the radio. Thanks, Sam! The first thing you notice about the IC is the flashy touch screen display.

I may be wrong, but I think this is the first radio with a built-in spectrum scope in this price range. I really like this display. The FFT scope also has an waterfall. Instead, I set up my screen to display meters, as shown below. Screen shot taken last night while operating 80m CW.

IC-7300 Downloads

The ability to take screen shots is one of the features that I like about the IC This may be a little too much information. Using the touch screen is easy enough when you get used to it, too.

To change the frequency, you simply touch the frequency display and a band-change menu pops up. To change the operating mode, you touch the displayed mode, and a mode menu pops up.

Changing the filter bandwidth, you touch the filter display. It made it much easier to learn how to operate the new radio. I can really think of only one negative at this point, namely the screen is a little on the small side.

Congratulations Dan! If you hit MHz again and hit 7 again, you can set that up for a different mode. Pressing and holding the 40m will keep it on that screen, but change to the next setting.

It really makes changing modes a snap because my filters etc are already preset. Thanks for pointing that out, John. I have the bands set up exactly as you do: one setting for CW, one for digital, one for phone. One of the things I immediately appreciated when I started using waterfall displays was the ability to find CQing stations easily.

I marveled at just how many stations were calling CQ, because in the past it was easy to miss them by just randomly tuning across the band. Later, when Elecraft released the P3, I went to that to free up my laptop display.New technology is changing the way receivers are being designed and the IC is an industry first as an RF, Direct Sampling System is being used in an entry level HF radio.

The ability to digitize RF before various receiver stages reduces the inherent noise that is generated in the different IF stages of a radio. Then processed in the FPGA Field-Programmable Gate Arraymaking it possible to simplify the circuit construction as well as reduce noise that can mask weak signals. The superior Phase Noise characteristics reduce noise components for both receive and transmit signals.

The RF Direct Sampling is protected by an array of bandpass filters. The signal passes through one of the fifteen bandpass filters, where signals outside the passband are rejected. To reduce the insertion loss, the IC utilizes High Q factor coils. The large 4. Like on the high-end rigs, the waterfall shows a change of signal strength over a period of time and allows you to find weak signals that may not be apparent on the spectrum scope. Image below shows the Audio scope with the waterfall function and the oscilloscope.

This means you can use either the spectrum scope or the waterfall to quickly move to an intended signal while listening to the receiver audio. So, when you first touch the scope screen around the intended signal, the touched part is magnified. A second touch of the scope screen changes the operating frequency and allows you to accurately tune. Large Color Touch Screen The large 4. Touch screen display. Waterfall function. Audio scope function. View our blog.

Waveform display area vertical axis.QRZ Forums. Before I ask the question, know that I am not an electronics tinkerer. So anything more than changing a fuse is not something I wish to do. I have had my ICOM for about 2 years. Normally it goes up to I checked all of my connections, powered down and back up again, and tried another CQ with the same results. I have three antennas, a hexbeam, a vertical, and a dipole.

I get the same results on all three antennas, no apparent transmitting power. I tried a strong CQ station, but they didn't hear me. Did I blow a fuse in the radio, or is it something more significant, requiring sending the radio in to an authorized repair shop?

Thanks for any advice.

icom 7300 s meter

KC5RRDec 17, K7TRFDec 17, I tried keying the mike to no effect. I use the rig's internal metering. I rechecked all of the settings.

Icom IC-7300 - Das S Meter Ein reines Schätzeisen!

I guess a full rig reset is next. SSB and whistle -- nothing. Full reset -- nothing. I'm shipping it out. How much power do you usually run on FT8? WA7FDec 18, Did the mic go out? I recently had my mic go bad on my But Still worked on digi modes and worked when I replaced the mic with a headset. Good luck! W7ESRDec 21, I hope not but, it sounds like toasted finals to me. Just curious what power level the OP likes to run on FT8. Hopefully he just has it in the wrong mode or something simple.

WA7FDec 21, W9WQADec 21,