| Author |
Message |
    
Tech808
Moderator
Username: Tech808
Post Number: 9466
Registered: 8-2002
| | Posted on Wednesday, March 15, 2006 - 7:33 am: | 
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I am starting this topic to address a Question from Wally38 on his KLV-400 blowing fuses.
Question from Wally38,
For some reason mine likes to blow fuses if I key down too long. Anyone know why?
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Tech808
Moderator
Username: Tech808
Post Number: 9467
Registered: 8-2002
| | Posted on Wednesday, March 15, 2006 - 8:04 am: |
|
Wally38,
What type of Radio are you using it with?
Are you using a Modulated Mic?
What is your Dead Key power?
What is your Maximum Swing Power?
What do you mean by: (if I key down too long.)
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Wally38
Member
Username: Wally38
Post Number: 84
Registered: 3-2005
| | Posted on Wednesday, March 15, 2006 - 7:07 pm: |
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Using a Texas Ranger 696f. But it also does it with my other radios. I use a power mic
I set the deadkey for 100 watts and it swings well over 400
If I key the mic long enough, the amp gets hot which I suppose is normal, but if I speak too long it blows the fuse inside. |
Rldrake
Intermediate Member
Username: Rldrake
Post Number: 113
Registered: 1-2006
| | Posted on Thursday, March 16, 2006 - 4:12 am: |
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Since you say that your PEP is well over 4 times your carrier power...it is obvious that you are over driving it. Reduce the mic gain to a reasonable level.
As for "keying too long"...the duty cycle for the amplifier should be in the operator's manual. |
Chad
Advanced Member
Username: Chad
Post Number: 734
Registered: 11-2004
| | Posted on Thursday, March 16, 2006 - 9:43 am: |
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The amp is really only rated to put out 250W AM, in SSB mode you will be lucky to see 400.
The EL519 is in NO WAY designed to produce 200+ watts each. Trying to do so will lead to a very short tube life. Back the "dead key" down to 50W and don't swing over 200, your neighbors will appreciate it as will your valves 
Chad |
Wally38
Member
Username: Wally38
Post Number: 85
Registered: 3-2005
| | Posted on Thursday, March 16, 2006 - 11:38 pm: |
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I replaced my tubes with new EL-509 tubes. They want to put out more power it seems. That's when the fuse issue started come to think of it. |
Chad
Advanced Member
Username: Chad
Post Number: 738
Registered: 11-2004
| | Posted on Friday, March 17, 2006 - 9:00 am: |
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An EL509 is darn near equivalent. Still not CLOSE to a 200W tube
Chad |
Caledonia
New member
Username: Caledonia
Post Number: 8
Registered: 8-2005
| | Posted on Friday, September 08, 2006 - 7:50 am: |
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Chad is correct. Do what he says, back deadkey to 50-60 watts. Come to think of it, I overcouple mine to accomplish this. RM manual is not very good about this. |
