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Years ago I had Galaxy 2100 in my VW bus. The 102-inch steel whip had a low SWR, but the radio's final would oscillate when feeding it. Changed the coax to a measured half-wavelength and it stopped misbehaving. Weird but true. 73

Would kinda figure Texas Star went out the same door. Anybody have reliable info about that? 73

Ditto! High SWR is either a feedline/antenna problem or the amplifier is distorting. The harmonic frequencies this would produce usually "fool" a SWR meter and cause a high reading. A coax jumper with a poorly-attached shield inside the plug is one possibility. 73

You can get fuses from Mouser. The fusehold caps are another problem. They are not universal. And they are not sold separately in my experience. You need to buy the whole fuseholder. just one problem, it would have to be the same as the one in the amplifier's back panel. There are two dominant...

No, the AM modulator transistor is switched out of the circuit by the mode selector in sideband modes. That's why the peaks are always a tiny bit larger on sideband than on AM in Uniden SSB CB's of that era. The added voltage drop of that transistor reduces the peak voltage feeding the driver...

My first guess would be a dirty mode selector. If it interrupted the 11.325 crystal when turning the knob, could that befuddle the PLL in the UFO? 73

No doubt. 73

Or is it the evil spawn of the Wouff Hong and the Rettysnitch? 73

Um, a lightning arrester for parallel open-wire transmission line? Clamp a pointy nail in each side, ground the center block and pass each side of the feedline under the lower thumbscrew on each side? Slide each side block to get the desire gap from each pointy end to the center. Just...

Umm, how many 40 year-old electrolytic caps are in the UFO? 73

Not so much inapropriate as unstable. An amplifier circuit appropriate for a 30 MHz transistor may present an oscillator circuit for a part meant to run at a frequency ten or twenty times higher. 73

Just about any NPN transistor rated for a a third of a Watt or more should do the job. 73

Wow! 30 MHz and six legs. New one on me. 73

Usually requires a third relay. It gets used to sense the radio's carrier, and either tickles the antenna changeover relay for transmit, or unkeys the preamp relay when the preamp is used by itself. Unless you're Texas Star. They do it with 4-pole switches for the power and preamp switch. Just...

Biggest single assassin of the preamp is the SSB switch. Sooner or later someone keys it with that switch on. When you key the mike with that switch off, it takes the relay a short moment to wake up and move the contacts. During that moment, your transmit power is being pushed upstream the wrong...

Not sure where an additional external knob for a carrier-power control would go on that one. The Peel'n Stick carrier-control module we sell would work, but teasing out the nitty-grittys to install it have never been done for that model. I'll have a look at CB209 next time I'm at work. Seems...

Negative feedback is all about reducing gain. Maybe that will tame a transistor that has ten times too much gain? Never had to try. 73

A transistor with that many legs is designed for higher frequencies. Having four flat legs for the emitter reduces inductance. This is only necessary above a couple hundred MHz. A transistor meant for HF frequencies won't look like that, and has only two emitter legs. A transistor with good gain...

Um, okay. A Galaxy DX959 in a bigger box/power supply with a bigger meter and more buttons. A DX2547 from a different importing company. RCI wants to sell radios, but the folks using the Galaxy name seem to have fallen on hard times. Different lipstick, same bacon. 73

Does it go "click" when you hook it up, flip the switches to operate and key the mike? Here's the schematic I have. If it goes "click" you're ahead of the game, even if it won't make the wattmeter wiggle. A close look at the diagram reveals a date of 1976. If you found a 1976 car and wanted to...