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fnkycoldmedina
Guest
i am getting a galaxy pluto real soon .i see info on galaxy radios all over the place ,but none geared directly at the pluto.
havent found anything yet.believe me i looked.anyone have info on the pluto mobile?looking for the modulation vr#and the am watts vr# and ssb vr#....i know this radio also shares the same board as some other galaxy radios,but which ones?let me know please ..thanks......
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havent found anything yet.believe me i looked.anyone have info on the pluto mobile?looking for the modulation vr#and the am watts vr# and ssb vr#....i know this radio also shares the same board as some other galaxy radios,but which ones?let me know please ..thanks......
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RE Galaxy Pluto.
I have just purchased mine from a local radio ham,and as far as i am aware the Galaxy radios with names,ie Pluto arent actually made by Galaxy.
Only radios that begin with DX then a bumber,are Galaxy made.
They share the same (or very similar) board as the Superstar 3900,made by cybernet.
I am having trouble getting hold of a user manual myself,but the rig looks easy enough to use with a little common sence.
From past experience,dont rely on the built in SWR meter,as they tend to under read,so use a seperate meter first,then try the inbuilt meter just to be safe,it will avoid using the rig with too high a setting.
As i said,i only got my Pluto the other day to use in my wagon,and wont be fitting it for a few days,but ill keep you informed of how it performes.
The seller had it on a meter,and it is putting out approx 18 watts on FM (I am in UK,England) and approx 30 watts on SSB.
It does look OK and with the lid off ,i cant find anything that i should worry about,so i will keep my fingers crossed.
Good luck with your purchase,i hope it works out well for you.
73s from me,10.10 for now.
I have just purchased mine from a local radio ham,and as far as i am aware the Galaxy radios with names,ie Pluto arent actually made by Galaxy.
Only radios that begin with DX then a bumber,are Galaxy made.
They share the same (or very similar) board as the Superstar 3900,made by cybernet.
I am having trouble getting hold of a user manual myself,but the rig looks easy enough to use with a little common sence.
From past experience,dont rely on the built in SWR meter,as they tend to under read,so use a seperate meter first,then try the inbuilt meter just to be safe,it will avoid using the rig with too high a setting.
As i said,i only got my Pluto the other day to use in my wagon,and wont be fitting it for a few days,but ill keep you informed of how it performes.
The seller had it on a meter,and it is putting out approx 18 watts on FM (I am in UK,England) and approx 30 watts on SSB.
It does look OK and with the lid off ,i cant find anything that i should worry about,so i will keep my fingers crossed.
Good luck with your purchase,i hope it works out well for you.
73s from me,10.10 for now.
One of the 'best' ways to calibrate the SWR meter in that Pluto, is to build your own 2:1 SWR dummy load. You will also need to look up the proper VR pot for the internal SWR fine adjustment for that radio. Maybe you will have more luck finding it out better that I did. Or maybe someone on this forum knows where to find it?
You will need an old/usable PL-239 male plug, and four - 400 ohm/2 watt resistors. Solder them in parallel across the PL-239 from its center to its shield. Check it it with an ohm meter and be sure that it reads 100 ohms across this plug from center to shield. Since a 50 ohm equals dummy load will give a 1:1 SWR on the meter; then a 100 ohms will equal a 2:1 SWR on the meter. This will make it easy to calibrate the SWR meter on any internal SWR meter in any radio.
But if you don't feel comfortable with messing with the adjustments in your radio to make it right; then off to the shop it goes...
You will need an old/usable PL-239 male plug, and four - 400 ohm/2 watt resistors. Solder them in parallel across the PL-239 from its center to its shield. Check it it with an ohm meter and be sure that it reads 100 ohms across this plug from center to shield. Since a 50 ohm equals dummy load will give a 1:1 SWR on the meter; then a 100 ohms will equal a 2:1 SWR on the meter. This will make it easy to calibrate the SWR meter on any internal SWR meter in any radio.
But if you don't feel comfortable with messing with the adjustments in your radio to make it right; then off to the shop it goes...
Thanks for that info.
Very strange that there isn't a VR to adjust the SWR meter calibration on the main board.
There isn't an internal sdjustment for the SWR meter on my 95T2 either.
Must be a fixed resistor...
Very strange that there isn't a VR to adjust the SWR meter calibration on the main board.
There isn't an internal sdjustment for the SWR meter on my 95T2 either.
Must be a fixed resistor...
ROB KI6USW -
What sort of VR adjustment on the main board are you looking for ??? The meter CAL control on the front panel is all that is usually required. In stand-alone SWR meters, there are usually NULL and COMPENSATION adjustments in the bridge circuit, but I have never seen these included in the SWR metering circuit in a radio. Let's face it, the SWR meter in the Galaxy Pluto is just decoration anyway 'cause the meter is so small that there is hardly enough resolution to tell the difference between a 1:1 and a 2:1 reading.
If I'm missing something here, let me know.
- 399
What sort of VR adjustment on the main board are you looking for ??? The meter CAL control on the front panel is all that is usually required. In stand-alone SWR meters, there are usually NULL and COMPENSATION adjustments in the bridge circuit, but I have never seen these included in the SWR metering circuit in a radio. Let's face it, the SWR meter in the Galaxy Pluto is just decoration anyway 'cause the meter is so small that there is hardly enough resolution to tell the difference between a 1:1 and a 2:1 reading.
If I'm missing something here, let me know.
- 399
Many of the SWR meters I have use an internal adjustment to tune the meter before it leaves the factory. Sometimes they need to be retuned; or they become useless...
I know that Some radios also have such an adjustment. If they don't; then there must be a fixed resistor that can be changed out to a variable - so that it can make the built-in SWR more reliable. Sure would like to see someone start some threads to do this for certain radios. Would bring those radios up a notch. A 2:1 dummy load would check any radios built-in meter SWR accuracy; that is my point.
I know that Some radios also have such an adjustment. If they don't; then there must be a fixed resistor that can be changed out to a variable - so that it can make the built-in SWR more reliable. Sure would like to see someone start some threads to do this for certain radios. Would bring those radios up a notch. A 2:1 dummy load would check any radios built-in meter SWR accuracy; that is my point.
ROB -
OK. Now I see what you're getting at. To be able to align the SWR meter in the Galaxy Pluto, locate R212. It is a 1K ohm resistor between VR14 and VR16 in the rear center of the main board. Remove this resistor and replace it with a 2K ohm pc trimmer pot (Cermet multi-turn, if possible).
To align the SWR meter, connect a 50 ohm dummy load to the radio, and with the SWR/CAL switch in the CAL position, key up the radio and adjust the CAL control for the proper reading on the meter. Then connect a 100 ohm dummy load to the radio. With the SWR/CAL switch in the SWR position, key up and adjust the trimmer pot until you get a 2:1 reading on the SWR meter. That's all there is to it. You can check the linearity of the SWR circuit by connecting a 150 ohm dummy load to the radio and seeing how close the meter reading is to 3:1.
- 399
The one i have has the 3600-11B board,same as the old Saturns,you should see the board numbereither along the outside edge of either the component side or foil side, sometimes it's not real obvious so you have to look sharp. warlock35po
if i recall correctly, the galaxy pluto was made by ranger rci for CRT France, they were on sale here in europe up until a few years ago. there may have been others made for other importers with the same name or even with different names (not uncommon). the only ones i've seen were CRT FRANCE branded, but thats not to say there weren't others.
The ones over here were also made by RCI.
Here is a Quote from years ago by GRST (Galaxy Radio Tech Support)
Ray worked for Galaxy.
73
Jeff
Here is a Quote from years ago by GRST (Galaxy Radio Tech Support)
Ray worked for Galaxy.
73
Jeff