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You mean replace the PLL with a direct digital synthesizer? I guess it would make sense if you want to do some funky FM modulation or change or sweep frequencies really fast. No reason it shouldnt work as long as the power level is right, and the frequencies are in the same range as the...

Plasma shouldnt be allowed because its a power pig. Its an RFI generator because it has thousands of wires runing thru the screen with hi-current hi-speed signals.

bob85: you know your stuff. I admire that! ST had a good apnote that describes the problem with bipolars: So as you can read. It is more simple for bias to use a mosfet when you must bias an amp for SSB. motorola also had a good apnote on it AN860.

The best way to get out further is to improve the antenna system. Because you want to hear stations that can hear you. Beyond that, you are best off leaving the CB the way it is and get an external two-pill amp. They are not expensive and give good bang for the buck.

I can assume you are using GMRS simplex. Because if you were using a hilltop repeater, you would get good results from GMRS. 11m CB will do way better than UHF simplex, just as you described. UHF signals reflect off of just about anything. These reflections can combine to cancel out the...

Maybe there is a reason for that diode burning up? I'll bet my last dollar that if you put a new diode in there, it'll just burn up the same because something else is wrong there in the squelch circuit putting too much voltage on that diode.

The SSB/CW is receive only. It receives from DC to daylight, but only transmits on 144/220/440MHz. You can use the radio as a shortwave receiver, but as everything its only as good as the antenna, so for HF you'd need a longer antenna.

I would expect a price similar to the Kenwood TM-D710A around the six-hundered dollar area.

Its a common ham good ol' boys behavior because they recognize each others voice. Familiar voice = ID.

I read that only FLEX models have firmware, the SDR-1000 does not use firmware. The PowerSDR is open-source, so it should be no problem to find the frequency limits.

That is true only for a sine wave. Voice is not a sine wave, and voice is not symmetrical. 3 ways of expressing voltage of a common AC wave form

He also goes by Gadfly on the thetruckersreport.com forum, such as Need some help...New Connex CX-4600 Turbo - Truckers' Trucking Forum | Largest Class A Message Board notice the similar tone and subject matter. more: Why do truckers use linear amplilfiers with their CB radios? -...

Its not terribly difficult to get high power on two meters. There is the palstar commander II amplifier with a single 3CPX800A7 triode providing 1000 watts rated output on two meters.

My impression is like this. Consider the 419 nigerian scam. Who is more to blame, the scammer in nigeria? or the gullible victim? Seems to me the Col was a bit clueless about the internet in general by allowing redneck to own the whole forum and domain name and all. Seems like he was...

grounding actually has nothing to do with interference to the neighbors. grounding can make it worse in some instances due to bringing the RF closer to the house. You actually only need a DC ground of your antenna to the earth. The purpose is to provide lightening protection, or reduce...

The WiFi signal itself wont effect 3-30MHz range because wifi is at 2.4GHz. But what can interfere with HF radio is the microprocessor in the wifi access point, or some cheap wall-wart with noisy switching power supply. The CPU and related chips are not shielded, the access point case is...

A handi-talkie that runs on 11 meters is only not practical due to the antenna requirements. I think you would not be impressed with the performance. Even though, cobra and midland have AM units for USA market. You can get FM units for the British market. Search for the Midland Alan 42. I...

12v + 6v = 18v If its 500+ amps then it must be un-regulated, just switching. The problem I see could be that if a relay fails, perhaps 18v could go onto the vehicle power. Or perhaps it would connect a single 6v battery to the 13.8v system. Wouldnt be able to say without a schematic.

tell us about your antenna

You're almost there. Think of 50% efficiency like this: half the DC input power is going as useful RF, the other half is going as heat. So if you have 500 watts RF output, then you need 1000 watts going in on the DC. In other words, for 50% efficiency you need to add 100% to get the total DC...