Laney Klipp 100 fuses

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Laney Klipp 100 fuses

Postby inisio on Wed Aug 31, 2016 9:02 am

Hey!
I have some questions about fuses.
the thing is i recently bought myself a pretty awesome sounding Laney Klipp 100, but on same day a got i managed to blow the HT fuse. I found that one of the PT's had popped out alittle from its socket, probably from the bumpy car ride home.
Well anyhow, i popped it back in place and was gonna change the fuse aswell. but it is has a sticker on the back that says 1.4a? is it just me or doesnt that seem alittle weird?

since i only have 1.25a and 1.6a fuses that are the closest ones, i went with the 1.25a just to be safe. i can play normally with the clean volume at 12 o'clock but beyond that and the fuse pops.
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Re: Laney Klipp 100 fuses

Postby trobbins on Sat Sep 03, 2016 2:58 am

Strongly suggest getting the amp checked for nominal rail voltages and output stage bias. A fuse with a rating that close to spec should not fail well after start up.
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Re: Laney Klipp 100 fuses

Postby stratele52 on Sat Sep 03, 2016 9:07 am

Is the fuse should be a Time Delay or Fast Blow ?

If amp need a TD and you put FB, fuse won't last.

PT is use for Power Transformer, you talk about power tubes.

Remove all power tubes , try new fuse.
If fuse do not blow ,most of the time one ore more power tube are short or bias is too hot.
If you blow , see a qualified tech

Or tubes socket's contacts are bad or resistor on power tube circuit are defective.
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Re: Laney Klipp 100 fuses

Postby inisio on Mon Sep 05, 2016 6:46 am

Well i'll update the situation, I was wrong about the fuse. It was the main fuse, not the HT one. Which according to Schematics is supposed to be a 2A fuse not a 1.4A.Why is that though?
And i've been using the Slowblow fuses to answer your question.

The amp started to act up even more yesterday, the sound started to Cut in and out. So it kinda sounds like its Morsecoding or something,hehe.
And when you look at the tubes, the blue light is blinking instead of being constant.
So i popped it open and noticed that someone has made a trimpot bias mod on it.
Well i'm gonna resolder all the joints in it just to be sure, and take a closer look at the bias components.
anything else that i should know of? :)
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Re: Laney Klipp 100 fuses

Postby stratele52 on Mon Sep 05, 2016 7:57 am

Did amp need slow blow or fast / normal blow fuse ?
What say Schematic ? Slow blow or normal blow ?

Something write about that fuse on the back of the amp ?
Tighten all tubes socket pins and clean them all
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Re: Laney Klipp 100 fuses

Postby inisio on Mon Sep 05, 2016 8:33 am

stratele52 wrote:Did amp need slow blow or fast / normal blow fuse ?
What say Schematic ? Slow blow or normal blow ?

Something write about that fuse on the back of the amp ?
Tighten all tubes socket pins and clean them all


the amp needs slow blow according to the schematic and the sticker on the back says 1.4A slow blow.

everything is tightened down, pressed out the pins and cleaned.

since all the tubes were flickering I doubted that it was one of those that was faulty, but I tried them in another amp and they ran as they should.

but i'll go over the caps and bias parts once I get off work.
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Re: Laney Klipp 100 fuses

Postby stratele52 on Mon Sep 05, 2016 8:43 am

1-What is flickering ?

You write ;
" the blue light is blinking instead of being constant."
Blue light inside tubes ? Power tubes ? one or more ?

Is that you are talking about ?

http://www.thetubestore.com/Resources/M ... /Blue-Glow

2- Did you fuse blow again ? I guess no since you use tue right one
3- You write ; , ".....the sound started to Cut in and out..."

4- At any power ?
Check negative feed back resistor
Phase inverter circuit
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Re: Laney Klipp 100 fuses

Postby inisio on Mon Sep 05, 2016 9:51 am

stratele52 wrote:1-What is flickering ?

You write ;
" the blue light is blinking instead of being constant."
Blue light inside tubes ? Power tubes ? one or more ?

Is that you are talking about ?

http://www.thetubestore.com/Resources/M ... /Blue-Glow

2- Did you fuse blow again ? I guess no since you use tue right one
3- You write ; , ".....the sound started to Cut in and out..."

4- At any power ?
Check negative feed back resistor
Phase inverter circuit


1. All four Output Tubes are flickering with the blue glow that is the same as in the link you posted.

2. The fuses only blow when I go above 12 o clock on volume.The fuse one that I am using atm is a 1.25a slow blow, but the the tiny sticker on the back says 1.4.a slow. but since those aren't very common anymore I can't get hold of any.

3. Yes, they sound from the amp cuts out and comes back, synced with the flickering in the tubes.

4. The amp flickers even when all knobs are turned down to zero. it's lets the flicker sound through.

I will check those too as soon as I get home home, thanks a bunch for the tip :)
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Re: Laney Klipp 100 fuses

Postby stratele52 on Mon Sep 05, 2016 9:56 am

Don't care about the blue flickering.
Check Output Power tubes,
Check bias.
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Re: Laney Klipp 100 fuses

Postby inisio on Mon Sep 05, 2016 11:06 am

stratele52 wrote:Don't care about the blue flickering.
Check Output Power tubes,
Check bias.


well you asked me about the Blue flickering :D

anyhow, I swapped out the resistors and caps in the bias circuit. and it's working properly again.

now, there's only one question mark left. and that is why the little sticker says 1.4A main fuse and not 2A as the schematic specifies.
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Re: Laney Klipp 100 fuses

Postby stratele52 on Mon Sep 05, 2016 12:20 pm

Fuse 1.4 or 2 amps ;

When you check bias ( did you ?) how much current each power tubes draw ?
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