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Agreed. This magnetic loop most surely can be a great antenna if you have the construction skills and the materials available. Cannot stress how narrow-band this antenna is. Its a great asset for noise reduction, but it really does need a good motor to retune when you change frequencies...

Thats about +/- 15 parts per million (ppm). Its probably at the temperature extremes. Most ham handhelds vhf/uhf are better than +/-5ppm, so it shouldnt be difficult to do that.

You speak the truth. But there is more: its also about the drain-gate capacitance, also known as the miller effect. It has been said this capacitance varies over the RF cycle because it depends on drain-source voltage. This probably has something also to do with packaging. You really...

Such a beast is difficult to buy, because standard HF rigs put out 100watts "barefoot". So the only market for such a kit is the QRP crowd, and they dont want to run much power or theyre not QRP anymore. Probably the biggest issue with any amp kit is the greater chance of spurious emissions...

Such a feature is not practical in an HT. Even in the case of HT you mention, the cross-band repeat function is undocumented. The reason is that a repeating function is a high-duty-cycle operation. A handi-talkie, being a small form-factor with battery is not capable as such. Generally...

perhaps you are better off starting a new thread for your question. There are not "tons" of radios to choose from. You can only get down to $150 after a mfg coupon: Yaesu FT1900R 2m 55w (the 75w version is $165) Kenwood TM-271A 2m 60w For a bit more: icom IC-2200H 65w 2m $170 alinco...

you got half of it there, just put your audio into the other channel. Oscilloscope Measurement Methods

You mention the X channel coupled to RF, but I dont see where you mention Y channel. The Y channel must have your microphone audio, or whatever audio is fed to transmitter. Your o-scope must be in X-Y mode.

Its "moody" because you dont have the vehicle bonded properly with ground straps. Or.. You have a ground loop from not wiring dc power directly to battery. If you need to strap the radio itself, then you are probably exposing your body to high RF levels.

From a certain point of view, this could be considered a design flaw. Because to prevent this problem, the main rf deck board should be designed with holes in the area where a long screw would hit the board. That way the screw would just pass thru the hole.

HF vs VHF vs UHF are apples and oranges. You ask "The FCC has sold the entire HF/VHF/UHF spectrum". On UHF and microwave there is very real possibility of this since it is sparsely used, and has commercial value. We are losing 33cm now by default due to new IEEE standards. HF has no...

The D-layer during the day only has significant absorption below 7 to 10MHz, increasing absorption as you go lower in frequency. But the reason the lower bands like 80m open up at night is because with the D-layer gone, the F2 layer is accessable. The F2 layer looses its steam slowly at...

Because yaecomwoods are not showing up in places where cb's are sold. If yaecomwood radios starting being sold at such places, pre-modified and programmed to CB, perhaps then you might see some action. There is no law describing what characteristics of "can easily be altered to activate that...

For an in-production equivalent to 2sc1969, you might want to look at the 2ST1480FP http://www.st.com/stonline/products/literature/ds/16856/2st1480fp.pdf It has similar specifications. Perhaps transition frequency of 120MHz is adequate for 27MHz operation? These days, TO-220 is not a good...

That AWH-450 has the feature of being adjustable. It would have the advantage of being able to be set to run on a wide range of frequencies, but the instantaneous bandwidth is 20MHz. So if you dont adjust it right, it wont work well. A ham antenna for 70cm band would be a good choice if you...

he said 73s. Is it legal to say 73s on cb radio?

I would say you are receiving the local oscillator of the receiver of other side. Page 51 of manual lists I.F. frequencies. One of them is 47.25MHz. So under that condition 191.55 - 47.25 = 144.3MHz. If you put left side on 144.3MHz, and right side on 191.55MHz then you should get a nice...

Apparently the concept of having antennas on the outside perimeter of phone is new idea, and not all that well thought out yet it seems. Competitive pressures are high, considering the quality of the latest phones coming from HTC. Of more interest to radio buffs is the BCM4329 wifi chip used...

K9STH has already asked for 4m. 4m overlaps with VHF TV channel 4. With the migration to digital TV, most stations have left the VHF low band. Yet a few still remain, and they may wish to use it in the future. So it would be a fight with TV broadcasters if they still want that channel.

Those marine radios have low power settings. Make sure you're at the full power transmit setting, and fully charged battery. About the PMR446: these are not sold in USA because they run on ham frequencies 70cm 446MHz.