| Author |
Message |
    
Crow1970
Junior Member
Username: Crow1970
Post Number: 11
Registered: 12-2003
| | Posted on Saturday, April 02, 2005 - 3:04 pm: | 
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I have one of the blue face galaxy 250 amps. This is a great amp but on ssb it just chatters like crazy. Need to add a delay or something for ssb. Anyone have any information on how to do this would be awesome. I love the amp but would like to use it on ssb. thank you in advance... |
Audiophile73
Member
Username: Audiophile73
Post Number: 76
Registered: 5-2004
| | Posted on Monday, April 04, 2005 - 9:37 pm: |
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I thought those galaxys were biased already, u checked the back for a switch right
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Crow1970
Junior Member
Username: Crow1970
Post Number: 12
Registered: 12-2003
| | Posted on Tuesday, April 12, 2005 - 2:23 pm: |
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No switch on the back nothing at all. |
Therealporkchop
Intermediate Member
Username: Therealporkchop
Post Number: 349
Registered: 11-2002
| | Posted on Friday, August 19, 2005 - 12:08 am: |
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This is the mod for removing the delay from these amps. So if you check this part, you might find why as there is no delay...
Inside in the left rear quadrant (just a little left and back from tx'ers) is a 33uf cap. You can change it to a 10uf, keep the delay, and it won't interrupt your rx as badly. Be careful making this change....it's easy but if you rush or use too much heat you'll have a mess on your hands
The way they are mounted to the board you cannot clip one leg. To lift one leg you would have to totally disassembel the amp.
Make note of the polarity and clip off the top of the cap gently. Remove the remains leaving the two pins. CAREFULLY solder your new cap and switch there. If when switched out of line your tx chatters, you'll know to add a smaller cap for AM |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 1257
Registered: 7-2004
| | Posted on Friday, August 19, 2005 - 5:35 pm: |
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bias has nothing to do with the delay/chatter. my class 'c' (AM biased) box works just FINE on SSB  |
Hollowpoint445
Advanced Member
Username: Hollowpoint445
Post Number: 683
Registered: 6-2004
| | Posted on Saturday, August 20, 2005 - 7:08 am: |
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Whether you have relay chatter or not, I can absolutely guarantee you that a class C amp DOES NOT work just fine on SSB. It splatters worse than a zit and is just as unwelcome.
Class C amps shouldn't even be used with AM unless there is a great deal of processing used so the envelope doesn't vary much. Class C is best used for FM where the envelope doesn't vary at all. For AM and SSB AB1 amplifiers should be used.
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Bigbob
Senior Member
Username: Bigbob
Post Number: 2153
Registered: 12-2001
| | Posted on Sunday, August 21, 2005 - 1:00 pm: |
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'Course these class c amps were intended for keydowns and not for transmitting information.Bigbob |
Therealporkchop
Intermediate Member
Username: Therealporkchop
Post Number: 354
Registered: 11-2002
| | Posted on Sunday, August 21, 2005 - 2:32 pm: |
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What did what I say have to do with bias? Just check that cap and see if you have a problem with it or not. Maybe it was changed? |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 1284
Registered: 7-2004
| | Posted on Sunday, August 21, 2005 - 3:10 pm: |
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moderators musta had a field day editing this one!
every time i checked this thread it's been different
guess i'll refrain from responding |
