| Author |
Message |
    
Grumpy
Intermediate Member
Username: Grumpy
Post Number: 146
Registered: 4-2005
| | Posted on Monday, March 24, 2008 - 6:36 am: | 
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the radio gets to hot
thanking of going with a 93t with turbofans
but would lose power |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 4200
Registered: 7-2004
| | Posted on Monday, March 24, 2008 - 2:58 pm: |
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get a couple small, thin computer-type fans. stuff a few plastic molys into the fins & attach the fans. i've done that on texas star amps, S9, omega force, ar3500, ic706mk2g of my own, done on other peoples amps & radios & suggested that approach to others. if you get a fan or 2 that move enough air, you'll be good!
a couple things to check-are SWR's LOW, say under 1.5:1? high swr will cause radio to run hot. also, check output. 2x2290 a should have max carrier of 40 watts & PEP of 160. you CAN probably get them up to 100 carrier & 200+ PEP at the expense of transistors due to excessive heat. back it down some, 200 down to 150-160 will NEVER see any difference at other end, and any more then 40 watts carrier is just waiting for smoke. if you're on the high end, lowering it will cool it some too. |
Dale
Senior Member
Username: Dale
Post Number: 1336
Registered: 12-2002
| | Posted on Monday, March 24, 2008 - 7:45 pm: |
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welcome grumpy.i must say pat has all bases covered.i agree with everything he posted.
id would start with swrs
then check output within limits pat said
then last a fan.carefull with these some bring
background noisewith them.
dale/a.k.a.hotrod
cef426
cvc#64
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Tech808
Moderator
Username: Tech808
Post Number: 15556
Registered: 8-2002
| | Posted on Tuesday, March 25, 2008 - 8:37 am: |
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Note!
The Last Post submitted to this Topic was Moved to:
Copper Talk
» Ask The Tech
» Meters
» External plugin freq counter
Lon~Tech808
CEF#0808/HAM#001/CVC#0002
Tech808@copperelectronics.com
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