Copper Talk » Ask The Tech » Amplifiers » Texas Star amp « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Radiodude
Posted on Saturday, June 15, 2002 - 12:22 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
My texas Star 350hd is running hot. Do i need to put a fan on it. i am using it with my Melaka with the mic gain at 12oclock. What do i need to do????
Top of pagePrevious messageNext messageBottom of page Link to this message

Tech671
Posted on Saturday, June 15, 2002 - 10:28 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
The input carrier to a DX350 needs to be 1w - 1.5w. You should be supplying it with at least 13.5v and 35a. SWR below 1.5.
Top of pagePrevious messageNext messageBottom of page Link to this message

Radiodude
Posted on Sunday, June 16, 2002 - 10:55 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Ok i get that..but how do I control the input on SSB? I thought it was controled by mic gain. I have var on the A M side ..
Top of pagePrevious messageNext messageBottom of page Link to this message

Tech671
Posted on Monday, June 17, 2002 - 5:42 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
If your radio has variable power it should work on ssb as well unless your ALC limiter is hacked. If it is you have no choice but to use the mike gain as the power adjustment....which will work anyway, it's just a little cleaner by setting the SSB power and ALC internally. Don't know what radio you have so I can get specific. Typically the 350 will be ok with about 30w ssb input.
Top of pagePrevious messageNext messageBottom of page Link to this message

Radiodude
Posted on Monday, June 17, 2002 - 10:23 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Well I am driving it with my Melaka. But I only have the mic gain at 10oclock..
Top of pagePrevious messageNext messageBottom of page Link to this message

Tech671
Posted on Monday, June 17, 2002 - 11:14 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
The Melaka wide open on SSB will not overdrive the 350 in watts, just check your audio with other operators that it is clear.
Top of pagePrevious messageNext messageBottom of page Link to this message

Bigbob
Posted on Tuesday, June 18, 2002 - 8:32 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
I knew a ratchet jaw that drove his 350 with a 146gtl stock watts on ssb and melted the solder traces on the pills,now that guy wouldn't shut up,he got a ts400.
Top of pagePrevious messageNext messageBottom of page Link to this message

409
Posted on Thursday, June 27, 2002 - 5:14 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
All the solid state linear amps will over-heat if you have long key down times because the amp is not designed for a 100% duty cycle. Commercial amps can go continuous but they are designed for it. Putting a fan on to cool the heat sinks will extend the key down some. I have driven them hard and easy, on low and high....still the long key downs causes heat build up even with very low SWRs.

Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: