Recent content by DTB Radio

I have the schematic, but no way to scan it as it is too big. I did my best to photograph it for you.

Glad you got that figured out! Even with biasing slightly high, you should not have seen that much runaway current so quickly.

Glad someone posted that question! I've often figured there was a special tool for that, but since I never had any problem using pliers to do it, it was never a big deal. Now that I've seen the tool, I'm probably going to expand my tool kit.

Cobra used to have a repository of all their schematics on their website, but I can't find the link anymore. I've contacted them to see if it still exists.

You will want to document signal levels at different points in the transmit circuit chain when the radio is operating properly, then compare them to the ones you see when it falls off. This should narrow the problem down quite a bit.

Please add me to that drawing as well!

I've never seen this brand or heard of it. I'm guessing its one of those little niche brands that popped up to take advantage of the huge CB craze of the 1970's. The maker is Asahi Denki Co, LTD out of Japan. The radio works well, and was even made with a standard 3-pin power connector like a...

I didn't see any brand as such, just a few cryptic alpha-numeric characters that I didn't think to photograph. Pretty sure they just spelled "shite".

Partly agree with you on that; however, I have encountered factory systems that actually worked quite well for a few years before needing to be replaced. Some, of course, are utterly useless and should be replaced immediately. In some cases, the over-all system is fine for years with proper...

I 2nd the NMO idea. I keep those items in stock for that very reason.

I had a customer this morning with a Freightliner Cascadia tractor that turned out to have a bad antenna. This system was an external, single-antenna setup. Most customers keep their old antennas so that when they leave the tractor/company they can re-install it and keep their good one. This...

Loving the new Richard II for the most part, but while changed values in the tech menu seem to be saving (and seem to be having the desired effect while in the menu, as in modulation level increasing), after the radio is powered down and powered back up, the effect is not applied in normal...

I confirmed that the last item on that was a result of a database that hasn't been updated from as far back in some cases as 2008. However, the correct number is not far off, lol. I was able to work out a compromise on cost with DAS to avoid the hassle of a return, so semi-happy ending here.

Yeah...

Pipe this invoice and tell me what you think. Keep in mind that some truck stop prices are actually cheaper for the exact same product than what DAS charged me for some of this. In particular, note my cost (unit cost column) and the suggested retail price (retail column) of the last item. I...