Finally, the explanation I've been waiting for. In about 2005, I bought a Connex CX-4300HP and a Texas Star DX667V which I still have them both today but I never hooked up the amp because I didn't know how to set dead-key. The Connex radio I used shortly but due to vibrations in truck, it began to squeal when transmitting so I sent radio to factory tech in Erie PA for repairs. I placed back in truck and didn't notice any improvements so I pulled it and put on shelf with the Texas Star and they've been there ever since. I do not possess the testing equipment and meters to check and set up properly so in 2023/24 I have an interest to place both in service but not without first having both checked and verified. The Connex is a single SC2290 PLL, the Texas Star has four SC2879 PLL's. I'm in the process now of trying to locate a radio shop around Middle Tennessee who can check both due to age, make any necessary repairs or upgrades, and pair these two together so I can put them in my Kenworth. Also being a fan of Astatic mic's, not entirely sure which model mic would work good with this radio in a noisy truck. This video has given me renewed interest in placing both pieces of equipment into service. I'm currently running paired Wilson 2000 whips adjusted to 1.3 SWR across all 40 on a Uniden PC78 radio with poor receive.

I have noticed when it comes to radio drive that coax and antenna tune can make a difference. Good informative video for those who needed to know this. So many guys over drive them trying to squeeze every last watt out.

Very informative. Cleared up some questions I had regarding dead key. Still don’t fully grasp but it’s clearer. Keep the videos coming!

Very enlightening , I didnt know any of this ! Well taught too !

Got my 307 amp 2 pill c-box 2 years ago now. Damn fine built amp. Love it still

Good video , good rule of thumb .. I knew this but I forgot . I just stored it to memory 👍

I power my 500v with my 955 at around 2 watts and I get a 60w dk and swings to over 500. Figure I can talk like this all day long and should be just fine. Thanks for the video

Hi , watched older video of Nathan Jones . Thank you for sharing . BTW am curious about your mature friend who bought comp Cobra 25 LTD Chrome . It sounded great on the videogame . 307 sounds like a maybe for me. Like your common sense in the hobby . Thank you ,Bill

Good video, Im a newbie also, I just got a older Pride 150 amp (unsure of how many pill it is) and will take the following steps to get it working correctly

I bought a Texas Star 250 without the variable nob. When i keyed up it would make the blinker in my car speed up.

I agree, good video, very educational. May I ask, how much does the first amp cost and what's the appropriate power supply rating? Thanks very much.

dear god , on behalf of us rookies, THANK YOU ! Maine307 waiving!

On my Cobra 29 I run a 2W DK swinging to 35W @ 14.5V into my 1 x 2 gives me better than 350W almost 400W. But I run it at 300W into my 8 Pill and get around 2000W out. Works great. Now I'm looking for a tech to work on my 148 GTL ST.

Very well done. Great information : subscribed

Great video. Thank you

Wow, someone that doesn’t drive the piss out of it.

Can you do a video on the 667 please , would really appreciate a lesson on that amp

I wish I could like this video twice lol

I wouldn't say the pre amp or receiving amp is useless cuz I've used em on my Pallmars and XForce amps and they really increased my ears at longer ranges by far huge difference I think on SSB modes it was great to have

What would be a dead key for a 2 pill 2290?? Is it the like the 2879, 25 watts per pill?

Nice video , just wondering with all the SWR/POWER meters you have , why not put one before AND another after the AMP ? 😊

Great video. Thanks for sharing your knowledge.

Great video, very informative! I appreciate the work and time you put into this. I have a Stryker 955 that’s tuned and peaked. What amp do you recommend if I’m looking for about 500 watts. I run it as a base station and I use a three element yagi.

Great 👍🏼 information

Thanks for making this video cause I was going to put 6 watts dead key into a Texas Star Dx 500… I’m a newbie….I also have a question about power …Should I run the Texas Star at 12v or should I buy a power supply that puts out 13.8 or even higher? Like14.5 volts? How many amps do I need to run my Texas star dx 500

Question I have is my amp is 45 year old digital sports 2 transistor can't read the values and can't find the model just brand on line have used as low as .5+ dead key and as high as 10 + in at 10+ in distorts notebly at under 5watt some distortion but only as cold and as near end of verbal stopps

Tell us about the radio and amp does before

Is that spec sheet watt rating specified as dead key and not peak?

Very well done.

I like that 667

Presuming the radio is correctly set to maximum AM audio and minimum acceptable carrier (~.5w - 1w) then you simply set the output to maximum with audio (saying, "Ahhhhhhh") and at maximum minus maybe 3% - 5% under the peak, you're done. You never want the carrier to be more than 25% of the total modulated AM output - but that's for only 100% modulation. -For a real radio with Negative Peak Compression (NPC) allowing up to a clean 141% - you should set it as I originally mentioned; Max it, back it off 3% - 5% and lock it there.

What is the advantage of having a lower dead key or lower average power vs having a higher dead key and higher average power? Aside from using less actual power and less stress on the amp??

The right way to set your radio’s deadkey is with an RMS reading watt meter. You set the deadkey so that the RMS meter is not swinging backwards. That than is the perfect setting for your system.

Top work mate. 73 London.

The recommended dead key is always in peak power?

Great video learned from it

EXCELLENT THANK YOU VERY MUCH!!!

Agreed 100%

I have a galaxy base and a 200 watt comet and dont want to spend more cash on a supply when i have a 16 amp,,will that work?Im scared to try it.

Good cb don't need no amp I had one it got stolen

What about MOSFETS? I have 8 and 1 I think...

What makes it hi drive? Transistors? Circuitry?

G👀D Stuff Nice Work 👍👍

Good info 302

Half a white day a key and let the thanks swing it will last forever

I had a dx667 Texas star that was a nasty kicker i could talk though pa systems car phones car stereos i pissed off a lot of people lol

I set mine to RMS NOT PEP. PEP is feel good watts.

thanks

I wonder if it would be worth it for me to send you my Texas Star 350 to repair. I could ship to you and pay for the repair and then pay for the cost to ship back

I have a dx 250. ?

What do u think a dead key would be on a cheap 203p rm italy amp from cobra 29 thanks

Do you happen to know what the setting would be for a dx 400 with 4 Toshiba 2290's ?

So what if you got a 1 driving 4 1446

Looking for a 300 power supply

What cable length do you run between your radio and amp? Just curious.

How would you do it for a tube amp? Let say a 1 driving 3... 6lq6's

We are looking for a 300 power supply

P.S. I meant 29 sorry.

Do you want to sell that Silver Eagle 350 ?

How about SSB?

Shouldn’t a HD amps have 4-5 watt dk into it to drive it? Rule of thumb was dk into low drive was 1/2-2 watt dk max pep to 20-25 watts Hd 2 1/2-5 watt DK pep swing to 35 At least that is what I was told back in the 90’s

Do yu hav a email