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I agree with both Nomad Coyote. Pretty much guaranteed to be an age-related issue. In your case, since AM is working well, you have a lot less circuitry to consider. Since your post didn't say anything about the receive being a problem, this limits the possibilities to the power supply and...

I know this is an older thread, but I recently had one of these come in DOA and given to the shop for parts. During a lol today, I pulled it out and did some trouble-shooting, and found that a bad ground and some loose screws were the main culprit, and got the main amp working. In this unit, the...

I just made a contact with Rocket station in Stockhom on CB channel 2, 10:16AM today, from my shop radio in Carlisle, PA.. All kinds of signal on him!

I know this is an old thread, but back about 24 years ago roughly a customer was carrying a buddy's amp across the next-door truck-stop's parking lot towards my shop for some tests, and a pair of FCC agents were in the neighborhood after investigating my shop for violations (they didn't find...

I stumbled on this IC while looking at possible diode replacements for the venerable 1N34-style part. I haven't thoroughly read through the spec sheet, but I wanted to put this out for general discussion and feedback. It claims to have a forward drop of less than 100mV, which would make for...

I kinda doubted there'd be an exact match out there anymore, and I'm certainly open to "fudging", lol! Thanks for the reply!

Do any of you know where I can lay my hands on the channel display for a DAK Mark X radio? Thanks! More to come on this one as I get it working again.

You're welcome!

That reminds me, I'm also selling lightning protection hats. They are similar to the CME protection hats, but they come with a heavy-duty grounding wire that is designed to burn through upon the beginning of a lightning strike, allowing you to experience the full thrill of the lighting bolt...

Just about any 3.5-inch speaker with proper mount hole spacing should work, as long as the magnet doesn't impinge on anything.The larger the magnet, the better the sound usually is.

I haven't seen the inside of one of these yet, but if its typical RCI, then its just the old DX version of the 2995 with a stronger amplifier. Schematics for the 2995DX (and the mobile version, the 2970DX, which is pretty much exactly the same radio) were made available years ago, but I do not...

I am selling tin-foil CME-protection hats, $9999.99 apiece. Heavy-duty, .05-mil thick material. Email "brooklynbridgesales@dimwits.com" for details.

Half of Teaberry's models went by a "T" of some kind, Like "Titan T", or "T Scout", or "T Charlie". What is your full radio model name? If it is the original 23-channel plain-old "T", the SAM's manual doesn't even show a pin-out, just that its a 3-wire system. If its the 40-channel plain-old...

Glad you got it going! In general, 0 volts on a tube's control grid is bad, as it allows heavy conduction from plate to cathode. I don't know your particular circuit, so I don't know if there are any other safety devices in play, but for most tube circuits, 0 volts on the grid means you won't...

What do you call a VERY large triple-gang potentiometer? A "triple-potamus".

You should be ok with just one more 1.5v battery, but I wouldn't recommend any more than that.

Simple adjustment should take care of the issue, but occasionally you will run into drivers with the actual meter drive circuit (failed diode or capacitor, out-of-spec part value, etc). You can often give the meter a bit more room for upwards movement by using a bit larger filter cap in the...

It is an intriguing idea, but I've never seen a kit for that personally, and to do the swap would likely require some frequency juggling. The typical MC145106 chassis (Galaxy, Connex, etc) uses different loop oscillator and VCO frequencies. You photo shows what appears to be an extra crystal...

The output impedance of the 5351 is 50 ohms, with drive levels up to 8mA. Should be enough for any oscillator/crystal replacement needs you have. For a more involved coding example than the samples provided with the Etherkit library, you can download the code I wrote for my key-pad-controlled...

I've never had any issues storing these things out in the open. They are NOT that delicate, lol! As long as you don't expose them to anything more than normal humidity, I doubt you would ever have any issue at all. As for drift, I've used these in a number of projects, and I've not had any...