| Author |
Message |
    
Thunderhead
| | Posted on Sunday, December 29, 2002 - 12:58 am: | 
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I just bought a x-force x-200 amp. I am running it with a grant xl that has a dead key of 2 watts and is swinging almost 20 watts. I have it hooked up to my tripplet 50 amp power supply and a wilson 5000 antenna. The amp works great on am, but when I try to use it on sideband it sounds distorted and over modulated. I've tried adjusting the modulation on radio but have had no luck. The amp had a pre amp and sideband switch installed at the factory. Everything seems to be working alright on the amp, execept for the distortion. When I run the radio without the amp on it works great. Would the swing kit in the radio be causing the problem with the sideband when the amp is on due to over modulation? I have the same problem with my hr-2510 with my d104 power mic on it. |
Tech671
| | Posted on Sunday, December 29, 2002 - 9:36 pm: |
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You say you're running a 50a power supply and a Wilson 5000 antenna? How is this?
Your distortion is likely because the X200 draws over 50a on ssb and the amp is starving for current causing distortion. |
Bigbob
| | Posted on Sunday, December 29, 2002 - 11:14 pm: |
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Yeah the tripplite 60 is only 42 amps continuous,get another 50 and run it parallel,even then it may not be enough.I seen tripplite has a line of professional grade P.S.s that range to 200 amps continuous,but exPENsive around 600 bucks or more,but I don't remember where I saw them,darn. Bigbob (ps-I could be mistaken) |
Thunderhead
| | Posted on Monday, December 30, 2002 - 12:24 am: |
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That explains why my radio lights dim when I key up on ssb. I figured if I ran the x200 turned all the way down it would work fine, but it don't. I thought that if the x200 drew to many amps for the power supply to handle it would blow the fuse in the power supply, but it didn't. I only tried to run it on ssb 3 or 4 time for a very short time.(less than 15 sec each time) Do you think this would have done any damage to the x200? I was also wondering if a 95 amp altinator which is in my truck would be big enough to handle the x200 on ssb? The tech where I purchased the amp said it drew 70 amps on ssb, does that sound about right. The amp works great on am loud and clear. I wont be running it on ssb anymore off my power supply. |
Tech671
| | Posted on Monday, December 30, 2002 - 6:20 am: |
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It will run fine in the mobile but allow me to make a suggestion...
Either sell it and replace it with the 200hd and have it class B biased, or send that one in for removal of the driver transistor and have it B biased. The prior would be less expensive, and then you could run it on your supply in the house or in the mobile and sound great on ssb. Depending on where you live there's a few authorized service centers for them you can drop me a direct mail. |
Thunderhead
| | Posted on Monday, December 30, 2002 - 11:21 am: |
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Thanks for all your help with my problem, It was greatly appreciated. |
Bigbob
| | Posted on Wednesday, January 01, 2003 - 11:06 am: |
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Tech671,is there a difference between ab1 and b biasing I mean will class b maintain linearity under various input levels provided they are clean?I don't want to invest a lot of cash into an amp that will be a dog on ssb,my main means of communication. Bigbob |
Tech671
| | Posted on Wednesday, January 01, 2003 - 9:54 pm: |
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The class B is closer to true AB than most that claim to be AB. Class B was used in many grounded grid amateur amps several years ago. |
Sparkomatic
| | Posted on Saturday, January 11, 2003 - 10:00 am: |
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I thought all XFORCE amps were class C biased. I own a couple of Davemades and 1 XFORCE and they appear to be basically the same amp. All my comp amps sound like <snipped> on SSB......I had to buy a Palomar 775 to talk SSB with good audio quality.
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Tech671
| | Posted on Saturday, January 11, 2003 - 6:48 pm: |
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Class B biasing is optional in XForce amplifiers. You would have to contact them for modifying yours. |
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