| Author |
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Insider
| | Posted on Thursday, January 03, 2002 - 4:32 pm: | 
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I have a KLV 200 base amp that blew a fuse one night. I replaced the fuse to see at what point it blows out.
Here's what I get. The amp turns on just fine, the fan and lights work, and the tube filaments warm up. As soon as I key the radio, the fuse blows.
I checked for any shorted wires: found none. Checked for burned components: found none. All diodes appear to test good. I don't have the proper meter to test capacitors. At this point, I'm thinking my tube went bad. I suppose, however, the relay could be the cuprit. Any suggestions.
Also, what type of fuse should I use. The manual specifies the current at 4 amps, but should I use a fast action fuse or a slow blow. For my test I used a fast action, but is that actually the right type or does it really not make a difference in this circuit?
Thanks in advance. . . |
Jyd
| | Posted on Friday, January 04, 2002 - 10:18 am: |
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the same thing happened to me you most likely shorted out a tube,also when it happened to me it blew a fuse,well i put another fuse in and turned it on and just fine.so i keyed it and blew that fuse,come to find out i also blew a diode as well. order you another tube from copper the replacement tube is better than the el519,then when you get the new one in try it if it blews the fuse again it is a diode,but a shorted tube is the cause of this |
Insider
| | Posted on Friday, January 04, 2002 - 6:43 pm: |
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Thanks Jyd. Upon initial testing, the diodes seemed good, but I guess I didn't make good contact with the probes when reversing polarity: both directions now show the same reading on the meter.
How tough a job was it getting the board out to replace the diodes, and then reassembling it. From looking at the baord, it's neat and tidy, but doesn't look like it can sustain too much handling. Also, since I have it apart, would it be worth it to replace the wires comming off the transformer that go to the HV. They're not damaged, but seem a bit small, or would I not see any difference in performance and life span? |
Jyd
| | Posted on Saturday, January 05, 2002 - 10:00 am: |
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i would not worry about the wires,i never took out the board when i changed the diode.i just had 1 bad one black with a circle around it,it is better to take at least one leg out of the board before testing them.good luck |
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