Copper Talk » Ask The Tech » Amplifiers » Techs: Do Texas Star amps have a standing wave quirk? « Previous Next »

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Colt
Posted on Tuesday, April 23, 2002 - 10:48 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

A man wants to sell me a Tex Star DX350 Hdv. He said that before I come over and check it out, I should be aware that Tex Star amps will show a standing wave of 2 or higher, but that it drops way down upon modulating.

I take it that this amp does this. What do you gentlemen say about it?
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409
Posted on Wednesday, April 24, 2002 - 4:04 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have a Texas Star DX400 and have not noticed any unusual standing wave readings . They seem to be in line with the normal readings when on stand by........
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Warlock
Posted on Wednesday, April 24, 2002 - 5:59 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Output impedance matching is why they do it and yes they have always been notorious for that.
The XForce 200hd (same transistors as the dx350) does not have that problem. Higher output, fan cooled, and ability to accept higher drive levels.
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Jyd
Posted on Wednesday, April 24, 2002 - 8:29 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

what are you talking about? SWR,on mine is 1.1
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409
Posted on Thursday, April 25, 2002 - 3:42 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Must be talking about the newer Texas Star's. All the older ones i've seen don't have this problem.
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Colt
Posted on Friday, April 26, 2002 - 3:41 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

This one's about 2 years old, I think. Info I'm getting so far says it's certainly not normal.
I think I'll pass on this one.
Thanks, fellers!
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Jyd
Posted on Saturday, April 27, 2002 - 10:49 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

my 350 hdv is a great little amp

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