Hey all!
I have an old Galaxy Pluto here I picked up used. I remember these from the early 90s as being a talking radio. This one, someone replaced the final section with an RFX75.
Anyway, it was working ok at the beginning, but now when it's powered up, it will stay briefly on frequency, and then drops off....a lot! We're talking like from 27.385 all the way down. To 20.xxx Mhz as shown on the frequency display.
It doesn't matter if the mic is keyed or on receive. At first, switching it off and powering it back on seemed to nudge it back where it needed to be on freq. After hooking it up to start using as a base, it got to the point it is unresponsive and drops down to 20 Mhz and doesn't want to come back. The receive audio is also non existent when it drops way off.
Have any of you ever seen this before, or know where to begin? I'm leaning toward a possible cold solder joint as a culprit, but since it is ancient, do you think it may have capacitor issues? Maybe PLL voltage?
This has me stumped, but I'm no professional tech by any means. Just a former USAF wideband comm equipment tech, and long time radio nut.
595 NE Iowa
I have an old Galaxy Pluto here I picked up used. I remember these from the early 90s as being a talking radio. This one, someone replaced the final section with an RFX75.
Anyway, it was working ok at the beginning, but now when it's powered up, it will stay briefly on frequency, and then drops off....a lot! We're talking like from 27.385 all the way down. To 20.xxx Mhz as shown on the frequency display.
It doesn't matter if the mic is keyed or on receive. At first, switching it off and powering it back on seemed to nudge it back where it needed to be on freq. After hooking it up to start using as a base, it got to the point it is unresponsive and drops down to 20 Mhz and doesn't want to come back. The receive audio is also non existent when it drops way off.
Have any of you ever seen this before, or know where to begin? I'm leaning toward a possible cold solder joint as a culprit, but since it is ancient, do you think it may have capacitor issues? Maybe PLL voltage?
This has me stumped, but I'm no professional tech by any means. Just a former USAF wideband comm equipment tech, and long time radio nut.
595 NE Iowa
