Search results

This collection should be legible enough to use. A diagram for a Maco product is just a list of suggestions. The one with the hand-scribbled notes has specifics from units we saw here. Better than nothing.

Not really *your* own, but the guy in the video. Just happens to have immediate access to all the necessary stuff by hanging out at Nippon Chemi-Con. How geeky must you be to watch the whole 20 minutes? I'll guess the sources of his info are authentic. 73

As advertised, here is the mod to put the carrier control on the front panel of a Cobra 2000. It serves four objectives. To set the minimum carrier below a half Watt without having to add a trimpot. To preserve the same peak modulated power no matter how low the carrier is turned. To sound as...

The original type blower used in the Pride DXD300 was discontinued decades ago. Howard Industries exited the blower business, and nobody ever copied or licensed the plastic-body design as a second source. The original-type blower I used to rebuild this amplifier sounded okay for about the...

For years we would see tiny lumps of black potting resin with three wires protruding, installed mostly in radios built by RCI. These were "swing kits". You removed a resistor from the circuit board and inserted wires from the module into the holes where the resistor had been. Hammer the resin to...

The Cobra 1000GTL was an AM-only CB base that looks a lot like the 2000GTL. Has a clock, but no counter and no SSB. It was discontinued after a year or three unlike the 2000GTL model. The block diagram looks a lot like a Cobra 29GTL/LTD, but the circuit board layout is different. Users who like...

Return of the shameless plug department. Turns out molasses does flow in January. Just not in any kind of hurry. Finally got enough "round tuits" to build a batch of our Peel 'N Stick carrier control for AM-only radios like the Cobra 25, 29, Uniden PC76,78, President Dwight D, Zachary T and...

The R10 relay was developed at least 60 or 70 years ago. Maybe by Potter and Brumfield, can't be sure. But the generic industry term for it is a "cradle" relay. The magnet pulls on a lever that's at a right angle to the direction of contact-point movement. Makes the relay smaller. Also makes it...

I was gonna list this 811A tube on fleabay, mostly for grins, not so much for profit. Yet another listing that starts with "It's dead, Jim". Just a bit better than cluttering the local landfill. Until it rolled off the bench and onto the floor with a resounding "POP!", tinkle. One bright...

The Body Bag Pride DX300 is for sale. The guy who had first refusal didn't come up with the funds. So now it's up for grabs. It's fully functional except for the receiver preamp and the SSB switch. If you want to use it for sideband, there's a RCA jack on the back to "hard key" the amplifier...

At last! A practical use for the Cobra 148 Gee Tee Ell "DEE" radio. Cobra shopped around for low bidders to build the 148 for 25 years and finally succeeded in ruining it. The "D" apparently stands for "Dog". It's famously useless for sideband. Never mind why. At least it can serve as an organ...

Here's a product I never thought I would announce. For years my advice to keying a ham linear from a CB or 10-meter radio was to install a relay inside the radio. A patch cord keys the ham linear as soon as you key the mike, and drops back to receive when the mike does. No chatter, no sideband...

Here's a problem with miniature toggle switches I had to discover the hard way. They're made two different ways. The outer two terminal lugs sticking out the rear of the switch each have the contact point on the other end inside the switch housing. The center lug connects to the "seesaw" common...

Yes, I sell stuff on fleabay. Mostly I restrict hawking it here unless it serves to answer someone's question, or to announce a new toy. This falls in the latter category. A shameless plug, if you will. Maybe that's what I should call this set of four RF load resistors, the Shameless Plugs...

Uh, "trans-genred? Yeah, this 10-tube Phantom got turned into a Maverick. A genre-change operation. It arrived here with a quirky setup, four big 30-Watt rated tubes driving six smaller 20-Watt rated tubes. Just looked backwards. It had clobbered only two of the six small ones. I posted pics of...

Don't know how many folks out there will still tackle rehabilitating a 23-channel Tram D201, but here's a common fault that causes the receiver to have "almost" the proper receiver sensitivity. This radio needed about 4 microVolts to hear what should normally require one or less. If the customer...

Holy Moly! The Ranger Longhorn Superior N6. Only thing longer than the name is the price. I'll leave looking that up to anyone who is interested. I don't sell these, I only convert, er "un-cripple" them. There is a short red wire on the solder side of the pc board. No picture, because you...

The D&A Phantom amplifier remains popular, even though the cost of restoring them continues to climb steadily. The original tube types it used become progressively more scarce decade by decade prompting the use of substitutes that are less popular, and less expensive. The four driver tubes on...

Here's an item that may or may not ever see the light of day as a DIY install yourself product. One of the stumbling blocks is the need for explicit instructions to install it. I could just tell the buyer to "connect this resistor to the cathode of the PLL's VCO". This would generate...

A question that comes up from time to time goes something like this: "I just bought a new RCI2995DX base radio. It's stuck on 24 MHz and 28/29 MHz bands. How do I get 27 MHz?" When you unpack a new radio you should see this scotch-taped to the underside of the radio. I call it a dongle. Some...