I have a real golden screwdriver special here. Board# EPT120112Z. Similar to the SS121, but not exactly. I cant find any info on this radio. Looking mainly for alignment info. Ive gotten it as close as I can, with a 4w key the modulation is super low. Around a 1/2w key the modulation is great. This radio was missing the audio chip. Replaced 9 broken cores in cans. Someone had soldered the meter light ground to the meter negative side. Found 2 blown diodes, 2 bad caps. It was a pretty good mess of bad solder joints as well. As best I can tell its all straightened out now except the low modulation. Does anyone happen to have a schematic or alignment procedure for this radio?
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Superstar SS3000B
- Thread starter Spams24
- Start date
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- Tags
- alignment low output superstar
Search around the CRT site above, the are several different clones that use similar boards, maybe one is closer to what you have.
It's weird that it's different than the schmo, but you never know who's changed what over the years or if it was a last run before a new board came out....
73
Jeff
It's weird that it's different than the schmo, but you never know who's changed what over the years or if it was a last run before a new board came out....
73
Jeff
is this the one with the dual audio amps?
If so, i believe there is a thread i started years ago when i was messing with the one i have.
I need to get back to that radio someday...
LC
If so, i believe there is a thread i started years ago when i was messing with the one i have.
I need to get back to that radio someday...
LC
One of the dual audio-chip versions was EPT3000, maybe? There is more than one of them. The Ranger RG33 schematic is posted here, I think. Can't remember the pc board #, but it has the push-pull audio amp and big modulation transformer.
73
73
this board is going to be very similar to the early galaxy radios like the DX33HML.
there will be differences in the PLL section, and the offset crystal used will most likely be a different frequency, but the rest of the radio should be pretty much identical so you can use their alignment instructions for the most part.
you should be able to align the PLL section as well, just don't use their numbers.
for example, if you hook up a freq counter to the correct test point and they say that you'll read 16.2700 mhz on a certain channel and use coil X to adjust it, but your radio reads something different, it should be close to what it needs to be and you would just tweak it a bit to get it "right". like, if you read 34.9813, you could most likely assume that 34.9800 would be correct.
hope this helps.
LC
there will be differences in the PLL section, and the offset crystal used will most likely be a different frequency, but the rest of the radio should be pretty much identical so you can use their alignment instructions for the most part.
you should be able to align the PLL section as well, just don't use their numbers.
for example, if you hook up a freq counter to the correct test point and they say that you'll read 16.2700 mhz on a certain channel and use coil X to adjust it, but your radio reads something different, it should be close to what it needs to be and you would just tweak it a bit to get it "right". like, if you read 34.9813, you could most likely assume that 34.9800 would be correct.
hope this helps.
LC