There are two reasons for this: First. Page Ac Power Supplies SGC does not generally recommend switching type power supplies in either a mobile or a base station installation for these two reasons: first, switching power supplies easily generate noise from the switching circuitry; While you can use a single battery to power both the vehicle and the radio, SGC recommends the installation of an additional battery in all cases where this is practical.
The reason for this is that the output voltage from a battery drops as the load increases. Page Solar-Powered Chargers It should operate over a wide range of loads and should continue to provide trickle charging to keep the battery system charged to its fullest between operating sessions. Page Antenna Wire Size — is lowered as the horizontal antenna moves up from ground level.
The angle approaches its minimum one wavelength or more above ground. Page Near Vertical Incidence Skywave dipole lobes are perpendicular to the wire axis , or beam antennas. Page Antenna Couplers HF radio controllers. SGC began building the servo-motor type automatic couplers in so the transition to a computerized coupler with extremely fast retune times was a logical development.
SGC is the only manufacturer to add the good attributes of a " whip which performs well at the 20 MHz range and above with the high performance of a helical antenna that performs well at the lower frequencies.
That's a major advantage at vehicle trade-in time. Page Operating The Sg With a ham radio type memory, they would have to know where, among the typical memories, were programmed the frequencies for KMI.
Page 56 This means that when you wish to delete a channel, you must handle deletion from the channel display, not the frequency display. Page Front Panel The front panel of the control head of the SG radio is shown in the picture below. The next section, Key Functions, refers to the keys on this picture. Page Sample Entries If you hold the down arrow, you will keep moving down the band. You can change the size of the frequency step easily. See Frequency Functions. Page Tour Of The Sg It also says that the radio is in the receive mode, as indicated by the RCV indicator.
Page 65 SWR. Page 68 Government or special applications only. In the amateur bands, frequencies on 40 meters the 7 MHz band and lower have traditionally employed lower sideband. Page 69 SG Page 70 U. Page 71 2. Page 72 If the squelch is activated in scan, the unit will continue scanning until activity breaks the squelch. Page 74 Hz ,. If you are operating in ham bands and especially when using CW , the Hz. Page Program Functions Page 76 The temperature of the onboard crystal oven can be maintained ready for power-up if the oven switch on the rear panel of the SGC supplies 12 VDC power.
The red stand- by light will remain on. As you will recall from the introduction to the radio, the onboard frequency standard uses a highly stable crystal oscillator. Page Channel There are two ways to change the operating frequency of an SG For large frequency changes, you may use the direct entry method. Page 79 Alternatively, it may be used to adjust the tone of a CW station to a desired frequency. Page Programming Enter the desired channel number Enter the desired frequency including one digit right of the decimal point.
You can scan from 2 to 30 MHz continuously in Hz steps. Or, you may scan just a few of the hundreds of channels. Page 83 3. Page Changing Frequency Or Channel Scan Rates 1 step per second 2 steps per second 5 steps per second This function will automatically time out after four seconds. Page Additional Functions The function will automatically time out after four seconds.
This means a calculation of:. Page Mobile Grounds 6 gauge stranded wire and that the ground of the battery be cleaned periodically to make as good a connection as possible. Wire runs will cause loss. Page 97 Wheel static may be eliminated with brushes, and accessory noise may be isolated by turning on and off items such as heater fans and air con- ditioners. With the control head detached from the body of the radio, the operating position may be made much more compact.
It seems to be putting out full power in cw. My MFJ power supply draws about 15 amps. In the watt setting, the tuner shows an swr of about 1. The power supply draws about 28 amps at this setting. But the radio seems to be barely putting out any power in ssb.
The power supply meter shows only about 2. Shouting into the mic a replacement barely makes the tuner meter move. These tests were done on 15 meters. I inherited this radio almost new from a friend many years ago, but it had never been used. I made a few contacts, but had trouble right from the start.
I presently use it with a 65 foot long inverted-L antenna and I can operate all bands from m to 6m with it. My rigs operate from QRP to the W power levels and this coupler has no problem sensing this power level and finding a match properly.
Although if you want the added flexibility of turning the unit on and off, viewing tune status, or placing the present tune position on hold a simple control box needs to be constructed. SGC includes a schematic diagram of an appropriate circuit on page 26 of their SG manual.
The txmt audio is a bit narrow. Can't think of 2. Three of which are: 1. Use a separate battery for your radio. Time Owned: 3 to 6 months. I have recently aquired this unit used and have had no problems with it at all. The radio is rock solid with consistantly good reports acrosss all bands even with the stock hand mike. One thing that impressed me was the Noise Blanker! It took the whistles and noise right off the signals. The other filtering is very impressive as well.
I will conceede that this radio has some getting used to in the learning curve - for folks who enjoy "spinning" the wheel and stalking signals I would say get the power talk head. I happen to have the standard and have not found this to be much of an issue with me. I find myself using my Yaesu receivers band scope to locate signals and then tune directly.
The additional 50W out over most standard HF rigs and the nominal 16A current draw is also nice. A testiment to its effiency. I have the PowerTalk head model, hooked to an SGC tuner with a backstay wire antenna, aboard a sailboat.
Operationally, the Maritime Radio Service utilizes "channels" for semi-duplex operation. MRS radios tend to be, by design, "channel-agile" as opposed to frequency-agile, a feature that frustrates a ham who likes to browse a band. As to strengths; the , with the PowerTalk head, is much closer to the ham ideal than are any of the other Marine SSB's I've used, in that the multifunction knob can be used much like a VFO, and direct frequency selection is comparatively easy. The scanning functions, when finally understood by the operator, work well.
It is a powerful unit, and I am able to routinely work voice and data at a range of 4, miles and more- which is the reason I bought the thing. Signal reports are usually very good, and reception on my end is satisfactory. Finally, and importantly to me, factory tech support is excellent. Also, I have not found a compatable headset, which I dearly desire. The included filters and DSP are very necessary in the radio environment I often find myself in a seemingly peaceful anchorage can have as much loose RF as the Hamvention due to the emailers.
The antenna is the vessel's backstay. I have used the SGC equipment in the marine and amateur services and have found it to be problem free. Transmitted voice signal quality has always been reported as very good.
The DSP controls take a little getting used to and there are times when it is better not to use the DSP and just listen to the unprocessed audio. It is not as smooth in this mode as my ICOM , for example, but it gets through. Amateur Radio operators used to purpose built amateur equipment, such as Yaesu, Kenwood, Icom, and others, will find the SGC a little different to use.
Quite a lot of key pressing on the SGC by comparison to amateur radios. I dont understand the poor reviews posted here. I have owned my SG since and it has been a quality piece of kit. Of course it does have some faults but it is certainly not junk! The front end is very sensitive and is usually operated with the attenuator in line to cut qrm. I use mainly ssb and arq, both modes work fine, especially arq.
It could be improved by having flash memory instead of the internal battery which dies very quickly. Some filtering options would be useful and the mic could be better. I have loaned this rig to a friend for two years and taken it to VE3 several times and it has always performed flawlessly. One way to improve the mic is to dive inside and turn up the mic drive pot.
When used with the it is an easy to use and reliable station. More than 12 Months. There is a delay before newly submitted reviews are Approved and posted in eHam's reviews. The delay is for new review screening and approval. The delay varies from minutes to a day or more. Before adding a new product use the "Search" tool on reviews Home page to determine if that product already exists in a category. A valid product review is one where you have experience or knowledge of the product you would like to share with others.
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