| Author |
Message |
    
Backlash
| | Posted on Friday, June 21, 2002 - 5:29 pm: | 
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My radio is a Galaxy 66 and I run a Wilson 2000 antenna with my TS500. My swr with the amp off is 1.5 to 1.6. With my amp on, my swr will peg out and the amp will usually get extrememly hot after extended use. I have already burned up one RF choke, and I still don't have a clue what to do to prevent it from getting so hot. I run about 1.5 watt dead key from radio. Any suggestions would be greatly appreciated. |
Tech671
| | Posted on Friday, June 21, 2002 - 11:36 pm: |
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1. Amp should be fed with a single 6ga (or larger) power line fused with 60a at battery
2. The ground wire should be at least 6ga and go directly to frame or battery, I prefer the battery in this situation with an additional 6ga wire from the case of the amp direct to frame
3. If you put the antenna on the roof with a temp magnet mount, you'll see the swr go down. Where the antenna is it is A. getting reflection from the cab of the truck B. insufficiently grounded. Running antennas on tool boxes or behind the cab is tricky and requires alot of ground. A Wilson 5k through the roof would alleviate most of your problem.
4. Running 8ga or larger ground straps from 4 corners of the cab to frame and a 4ga from the battery neg direct to frame wouldn't hurt either. |
Chrisdey
Junior Member
Username: Chrisdey
Post Number: 26
Registered: 1-2005
| | Posted on Sunday, August 21, 2005 - 12:59 am: |
|
I run a 95T with the same amp as you. I am not a tech but I have decided I like the radio and the amp alot and run a small 12v dc computer fan on each one with a switch, that way if I do get talking they never get hot. Heat is your enemy. I also run the Wilson 5K antenna like 671 suggests and I do just great according to those I talk to on the road. The only thing that even comes close to the Wilson in my experiance is a 9' whip, again, very well ground with generous cable. |
Moonraker
Junior Member
Username: Moonraker
Post Number: 11
Registered: 3-2005
| | Posted on Monday, September 05, 2005 - 6:36 pm: |
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A guy told me that his father had a texas star 500, I can't remember how much he was driving it with. He said the pills in the amp got so hot it melted the solder around them and they had to be resoldered. I don't know how true this is but it makes me wonder. |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 1405
Registered: 7-2004
| | Posted on Monday, September 05, 2005 - 8:40 pm: |
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 yeah, it's possible! |
Wildrat
Member
Username: Wildrat
Post Number: 78
Registered: 12-2003
| | Posted on Tuesday, September 20, 2005 - 9:07 am: |
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My DX500 has never got that hot, it's been warm. Grounding is everything. If you were to look at my chevelle wagon, and now my jeep you would think Iwas nuts. I have everything grounded multiple times, cables everywhere. i also have a computer fan blowing accross the heat sink of the amp and modulator. I am pretty sure all this grounding even helped keep the SWR low, and noise low etc.
Wildrat |
Chipotle
Junior Member
Username: Chipotle
Post Number: 33
Registered: 3-2005
| | Posted on Saturday, October 22, 2005 - 12:12 am: |
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The transistors can handle 400 degrees F. That is about what solder melts at. |
