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Galaxy 99v SWR High on SSB

Thanks for your input guys, I think we are getting somewhere. I will pull the covers off tonight to see if there is anything obviously wrong. I will probably end up sending it somewhere to be checked out. The heat sink doesn't get hot, but I do not key it very long either.
 
ShadeTreeMechanic said:
Thanks for your input guys, I think we are getting somewhere. I will pull the covers off tonight to see if there is anything obviously wrong. I will probably end up sending it somewhere to be checked out. The heat sink doesn't get hot, but I do not key it very long either.
Click to expand...
Yeah, something definitely screwey going on. It does seem you may have a carrier balance issue that would cause the radio to show deadkey power on SSB, but that doesn't explain why the SWR shows high on that mode and not the others.

You can try adjusting the SSB carrier balance pot to see what changes. Before you do, use a marker to note the position of the pot and turn it each way and see what happens. If no change, move the pot back to it's original location and have a tech look at it.

The SSB carrier balance pot is VR7 that's located at the lower center of the radio.

Open link below to see pot locations.

http://www.cbtricks.com/radios/galaxy/dx99v/dx99v_adj.htm
 
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I guess I missed the part about steady output when keyed on SSB. I thought it was just a spike when first keyed up then nothing. I have seen many rigs do that and most often it was due to a dirty mic PTT connection or simply a little snap or creak in the mike case making a sound when squeezed to key it up. If it does have steady output on SSB mode there is definitely an issue with either oscillations or carrier balance. Either way it needs work.
 
I have seen the carrier on ssb when the field voltage is set to high..
Does seem to be a carrier balance problem hopefully adjusting the proper VR will fix carrier problem.
 
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Thanks again everyone for the help. Well, I got a chance to look at it again. I tried adjusting the VR7 pot and it made no difference. Mic gain up and down. RF power up and down. VR7 right and left. No combination of any adjustments made any difference at all. Does anyone know of a good shop I can send it to? I am not sure what shops charge to look at and fix something like this. I gave $150 for it and I'm not sure if I should fix it or look for another radio. Its kind of a shame because the whole reason why I bought it was because it has SSB. I also have a Stryker 440hp and it doesn't have SSB so I started looking and it just so happened that a co worker had the Galaxy in storage and was willing to part with it. Sorry for rambling.

So if anyone knows of a good shop, maybe I can send them an email to get an idea of what it would cost. Thanks.
 
If you looking for a a decent SSB rig then Galaxy is not it,
They have a well known drifting problem on SSB, great AM audio though.
 
Carrier on side band not good. Have had my old 99V for a long time. With problems. Overall as an SSB radio it was great(by report) but the freq counter was dancing and so forth on AM after 20 years of ownership. As far as the drift problem very true. Before you do any more either you(or tech) heat and beat that thing(hot iron on solder joints with rapping the frame of the radio with a soft handled screw driver. If they say you are warbling on sideband do the diode replacement as per Galaxy's recommendation. If you make it stable after heat and beat full factory align. All of your variables/trimmers will be working. I think that the cost of radio work is so high now many folks discourage that. Save you from spending money on a lost cause radio. I have not found one of those.
 
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ShadeTreeMechanic said:
Heat and beat, that's a new one for me. I can understand re flowing the solider. So rtap on the frame when the solider is hot? Maybe I misread.
Click to expand...

Around the PLL. And if this works. Do factory align. You can make a lesser export radio less crappy. Makes it last longer and not make new friends that are not your friends. If you have friendly HAMS around they might help. I don't imagine you have the equipment to do this. They do however, the decision to clean up a splatter box may not be in there best interest. I have several Galaxy's they are irreplaceable. They are illegal. The CB/radio shop might be OK, Take picture of the inside of you radio before you give it to anyone. If you see coils spread and stuff cut abort.
 
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2315 Robert said:
Around the PLL. And if this works. Do factory align. You can make a lesser export radio less crappy. Makes it last longer and not make new friends that are not your friends. If you have friendly HAMS around they might help. I don't imagine you have the equipment to do this. They do however, the decision to clean up a splatter box may not be in there best interest. I have several Galaxy's they are irreplaceable. They are illegal. The CB/radio shop might be OK, Take picture of the inside of you radio before you give it to anyone. If you see coils spread and stuff cut abort.
Click to expand...

Rap on the frame when you think you fixed it.
 
Thanks 2315, I will see if I can put it on the bench this week. I am an Industrial Electronics Technician by trade with over 20 years experience..... and I don't even own a scope. Trying to get a day off is hard but I have 3 weeks of vacation that I have to take before the end of the year. The only mods to the radio that I can see are the modulation resistor has been clipped and the clarifier is unlocked. I put a toggle switch on the talk back wire when I got it. I will probably send it somewhere for a tune when I am done fiddling with it. And now the Stryker 447 has caught my eye even though it doesn't have SSB. LOL

Thanks everyone for all the help. I will give another update when I get it back on the bench. Maybe I will figure out how to post pictures too. LOL

808 Back in the Shade
 
ShadeTreeMechanic said:
Thanks 2315, I will see if I can put it on the bench this week. I am an Industrial Electronics Technician by trade with over 20 years experience..... and I don't even own a scope. Trying to get a day off is hard but I have 3 weeks of vacation that I have to take before the end of the year. The only mods to the radio that I can see are the modulation resistor has been clipped and the clarifier is unlocked. I put a toggle switch on the talk back wire when I got it. I will probably send it somewhere for a tune when I am done fiddling with it. And now the Stryker 447 has caught my eye even though it doesn't have SSB. LOL

Thanks everyone for all the help. I will give another update when I get it back on the bench. Maybe I will figure out how to post pictures too. LOL

808 Back in the Shade
Click to expand...

Copy that. Thank you for advising what your trade is(very helpful). So if you choose to have equipment. Try the GSA auctions. Yes there are many scopes online. The last items I picked up were still certified(current calibration). So you know what that means, it works.
 
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ShadeTreeMechanic said:
Thanks 2315, I will see if I can put it on the bench this week. I am an Industrial Electronics Technician by trade with over 20 years experience..... and I don't even own a scope. Trying to get a day off is hard but I have 3 weeks of vacation that I have to take before the end of the year. The only mods to the radio that I can see are the modulation resistor has been clipped and the clarifier is unlocked. I put a toggle switch on the talk back wire when I got it. I will probably send it somewhere for a tune when I am done fiddling with it. And now the Stryker 447 has caught my eye even though it doesn't have SSB. LOL

Thanks everyone for all the help. I will give another update when I get it back on the bench. Maybe I will figure out how to post pictures too. LOL

808 Back in the Shade
Click to expand...

Sorry one more thing. The 99v should not need a switch to shut off the talk back. It should turn off on it's own when the echo/robo/vc control is turned off. My guess is that the original echo board went at sometime and someone introduced a new echo board. Mine is has failed. I am hoping the local electronics shop has a chip reader and will go after it that way. I hope you can get this going because the 99v is IMO the gold standard for Big Radio.
 
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