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This part you want is nothing more than an LDO, otherwise known as a linear regulator. Its the drop-in package which is obsolete, but not the function of providing 8.2v at 200mA with enable. Seems like two of the outputs are controlled by enable pin, but one is always on. Searching various...

first off, I would make sure the puxing is not set for repeater offset. I assume you are doing simplex FRS and not GMRS thru a repeater. If you still have problems, then get a scanner to see how it sounds on that. If you cant find it then do a search with the scanner antenna disconnected...

This weekend Docket 10-119 was released. It discusses proposed rule changes to part 95, which includes GMRS, FRS and CB. For FRS, they discuss banning radios with FRS with capability for other services. For GRMS, they consider going unlicensed. GPS data, and text allowed on GMRS. For CB...

most cbers are probably not capable of doing that. Also, if you operate on 27.380 LSB, you will have interference from 27.375 USB (and AM) because 11m radios dont have narrow ssb filter with good skirts to prevent interference. Mexicans use USB on 11m. You would be better off going to 27.415...

The best way to know if its an RF problem or a DC current draw problem is to key the amp (full power) into dummy load instead of antenna. You need to have the full DC load without any RF radiation. If you still have problem with non-radiating dummyload, then you need to look at alternator.

K3 has IF dsp. here is performance comparison against other radios elecraft K2 HF Tranceiver Performance Numbers When you are on CB, chances are if you receive splatter it actually being transmited by the station doing the splattering. But on ham radio, often splatter you hear is...

Depends if you have interference problems with close-in neighbors. Are you causing TVI? or are you picking up noise from neighbors? If so then you need the ugly balun and mast isolation first, taller tower for antenna, then you can think about ground plane for counterpoise. Although, sometimes...

Mosfets are silicon based. The 1969,2166,2132 you refer to are bipolar transistors. Mosfets have the opposite temperature coefficient compared to bipolars. In the context of EKL, you are referring to IRF520 which is not intended to be used for RF power. But there are mosfets designed...

Sure? The MRF150 have at least 17dB gain on 11m. On a single device 3w in gives at least 150w out. It means a single MRF150 would be more than adequate to drive 24. There are standard telecom supplies that do this. If using a transformer directly from the AC mains, its alot smaller because...

I suppose the button diode you refer to is MR750. This is for reverse polarity protection. The idea is that the diode D3 is supposed to conduct the large current if you connect DC backwards. This is only a 6A diode, but for the short time it takes to blow fuses, the fuses should blow up...

C3 is a DC blocking capacitor for the RF input. It is intended to be an open circuit to DC, but at 27MHz it should be of low loss. 1000pF is about 6 ohms at this RF. but 2000pF is 3ohms, and might give slightly better input vswr or less loss. You may also notice C1 is 15pF, which is used...

Seems this design could be made to serve 10 or 11 meters AM. Tank circuits and low-pass filter could be retuned. The SA602 mixer has no problem to run on higher frequencies. But the variable L.O. would need to be changed to a DDS, along with the crystals replaced to be fed by the same. Two...

Its certainly possible, but not practical. Its sort-of like cpu overclocking with nitrogen cooler. Sure you can get 6GHz, but your average joe cant do that. Trying to get 250 watts out of a 2sc2879 is like trying to overclock a pentium2 to run as fast as todays off-the-shelf computer...

Ive seen claims that RM3 is HUF75345P3, but this is dubious since this fairchild part has gate charge/gate capacitance which is an order of magnitude worse. Not something you want for 27MHz. More likely its just like ERF-2030: cherry picked IRF520 for highest gain and/or efficiency.

from VSWR and displacement It says "VSWR is not in any way dependent on the equivalent source impedance of the generator." That is a fact, however in practice it is most likely that if you attempt to change source impedance of your transmitter, you will likely be changing any significant...

Some of those fall under interstate commerce, and are therefore constitutional for federal regulation. However, the others should be handled at the state level. "impracticality is a price the 1791 First Amendment commands we pay"

This is a valid question to ask, because congress cannot delegate law making to another agency. Federal regulation of hobby radio is unconstitutional at the federal level. One could make a case that it involves interstate commerce, but thats a stretch. A licensed ham has much more privilege...

CBers usually need good ground-wave performance (correct polarization), this article doesnt cover that. take-off angles: high angles for NVIS. There is no NVIS on 11 meters. Low take-off is always important for DX. nulls: not an issue for 11 meters because the antenna is designed only for...

probably a better understanding about why fiber-glass antenna is worse can be had by reading the k0bg page on antenna efficiency. (An antenna with high Q is very efficient, but has more narrow operating bandwidth. cant have both.) The more material within the field of the coil, the more the Q...

I think you may be referring to VSWR. There are fairly sharp null points of voltage standing on a poorly matched transmission line. But the current standing at the same point is opposite: it peaks at the voltage null point. Maybe its better not to think of antenna/coax mismatch that way. I...