| Author |
Message |
    
Capncrunch
| | Posted on Thursday, August 01, 2002 - 2:21 pm: | 
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i have a dave made m400 with no switch for ssb was just wandering could it made to work on sideband or no?i never really use sideband but a friend of mine wanted me to talk to him there and i wasnt sure if i could do it or not |
Tech671
| | Posted on Thursday, August 01, 2002 - 9:26 pm: |
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You can add SSB delay. It'll be rough on SSB due to it is class C with driver, but it can be done. |
2600
| | Posted on Friday, August 02, 2002 - 3:01 am: |
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He's right. Some amplifiers are made to be LOUD on AM with no money spent to 'clean' them up for SSB. DaveMade is definitely in the AM-only category. If you want a SSB amplifier, the relay delay capacitor is the easy part. The best way to find out about an amplifier is to try it on your (or somebody else's) radio. QSO somebody whose opinion you can trust (important) and compare the SSB modulation between standby and operate. If the amplifier sounds raspier the lower you turn the mike gain, you are using an AM-only amplifier. Turning the mike gain higher and overdriving it will often be the "clearest", meaning (only)half as much gravel in the mouth. That's the clue. Lots of AM-only amplifiers come with an SSB switch. That's the cheap part. The additional parts (and engineering) that you have to put in for SSB cost more than just that delay capacitor and 'SSB' switch. Texas Star amplifiers are all biased for SSB and usually do okay. I've seen another one called "Skywave" that I know first-hand is MEANT for SSB. There's no substitute for listening. Even a legit SSB amplifier will sound terrible if somebody cut corners repairing it "just for AM".
73 |
Tech671
| | Posted on Friday, August 02, 2002 - 5:26 am: |
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Capn, if you want to send that hoss my way we'll throw that delay in for you. Drop me an email. |
Capncrunch
| | Posted on Friday, August 02, 2002 - 4:11 pm: |
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i think what ill do is just buy a smaller amp thats built for sideband instead of messing with this one i dont really talk sideband anyway maybe once or twice and i did ok with just the 2950 but anyway thanks for the info i was just curious about that you know how that is
thanks again
capncrunch |
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