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If you can't get a straight answer, then you're asking the wrong people. I keep a printed copy of this handy in my station: http://www.arrl.org/files/file/Hambands_color.pdf The sections labeled 'T' are where technician class operators can operate which, as previously stated, includes...

Thanks for the replies, but like I said, the info on CBTricks.com is for the original 5-pin "side-mic" Cobra 148 GTL. I know the new Chinese 148s are close to the original design, but the question is, how close? As an aside, I took a peek inside the radio this past weekend. I saw what I think...

I recently won a new-in-the-box Cobra 148 GTL in a raffle. Of course, it's one of the Chinese ones (exactly the same as the one Robb reviewed last year). I need another radio like I need a hole in the head, but I put it on the air for the heck of it and found that it's off frequency by about...

After reading your answer and thinking about it some more, I think I realize why I was initially confused about the use of class C biasing with push-pull. I think the drawing of the class C area of no conduction in the graphic included with the article is a little misleading. I understand what...

This brings a question to mind. Most solid state RF amps I've seen (both for ham radio use and for CB) typically use transistor pairs, which I'm assuming are operating in a push-pull configuration, as described in the article. That is, for a given sine wave cycle, one transistor amplifies one...

The Kenwood TS-480SAT/TS-480HX has a detachable control head too. Kenwood: TS-480HX/TS-480SAT HF/50MHz All-Mode Transceiver It's HF and 6 meters only rather than HF/VHF/UHF like the Icom rigs, but I know a couple of people that use them in their mobile setups and they really like them...

Can you describe the circumstances in a little more detail? Is this a mobile or base install? Does it happen during both receive and transmit, or only transmit? Can you tell what part of the mic is shocking you? I googled the mic and found a review here: Ranger SRA-198 Noise Cancelling...

There are at least a few truckers out there with HF amateur gear as well. I've had a couple QSOs with truckers on 40 meters before. It's probably not as prevalent due to the complexities of setting up a good antenna system, but they are out there. -Bill

Sadly, I don't have a sacrificial radio on which I could perform an NPC mod for demo purposes. The 3 HF transmitters I have are my Kenwood rigs, which I don't want to chop up in the first place, and which are all low-level modulated. The TS-430 and TS-850 both do AM using an AN612 balanced...

Hm. When he first turns the scope on, what he claims is "a basic waveform that is not modulated" is really being modulated. If there was no modulation at all (e.g. dead key), the signal should look like a solid band, like a rectangular block in the middle of the screen. I'm not really sure...

Just to follow up, I ordered the radio from Walcott. Got the shipping notice on Thursday, and it arrived today. No muss, no fuss. Now I just have to wait until I get home from work to put the batteries in and play with it. :) (As an aside, I've had incredible results sending stuff via the...

Thanks for the feedback so far, guys. I really appreciate it. m42duster: yeah, I noticed that Walcott's price is a little higher -- cheapest price seems to be $219 while they're asking $239. But that's the total price: shipping is free and there's no tax, so it may balance out. And yes, I...

I'm thinking of buying one of the Magnum 1012 10/11/12 meter handhelds. A quick search shows that a couple of different distributors have them in stock, including: - H &Y Electronics - Copper Electonics - Custom CB Radios - Truckers-Store.com - Walcott CB - CB World (wearecb.com) Does anybody...

Out of curiosity, are those two completely different Cobra 2000 rigs, or just two different photos of the same radio? I noticed that in the last photo, there's one Cobra 2000 radio but two Cobra 2000 speakers, so I know you've got at least two of those. :) -Bill

It's not clear if you've actually gotten your TS-940S to transmit on 11m. If not, the modification for it (and some other good info) can be found here: KB2LJJ Radio Mods Database and Manuals Long story short, it seems you need to cut/remove D130 on the digital unit, which is behind the...

Just an FYI, if you don't already have it, here's a copy of the TS-440S service manual: http://www.kb7tbt.com/manuals/Kenwood/TS-440S%20Service%20Manual.pdf Here's another scan with very high resolution images of the schematics...

If you already have your callsign and can see your entry in the license database, then I recommend you register to get an FRN (user ID) and password on the ULS site. Go here: FCC Universal Licensing System (ULS): ULS Home and click where it says 'REGISTER' (next to NEW USERS). Once...

I could very easily be on crack. I'm looking at the "DX88HL Schematic Diagram" link here: Galaxy Radios DX88HML Service Manual Unfortunately it doesn't highlight the signal flows. The output of the AN612 modulator (IC3) seems to have a connection to one side of FL3 (though R80 and D19)...

Doing a little more research, it seems like bandwidth of the 10M4D is really 6Khz, not 4. That seems about right for a typical AM radio. (Kenwood uses the same filter width for AM too, but their filters are designed for an IF of 8.83Mhz rather than 10.695Mhz. And they cost more. :( ) But...

Oh, it occurred to me that when piping your audio directly into the modulation stage of a rig, there's one more limiting factor you may need to take into account: IF filtering. Previously, JoeDirt mentioned the Galaxy 88. It looks like this radio uses an AN612 balanced modulator, like a lot...