Amp Casulity

Zoot Horn · Post by **Zoot Horn** » Sun Sep 25, 2011 10:32 am

Well, I suppose I'm the first casulity--plugged the amp in yesterday,,played fine,,again last night,,,this morning,,nothing,,no tube glow--checked fuse,changed power tubes,,changed power cord-changed outlets,, I'm gonna check the input tubes,,but somehow I suspect it's the power supply.Any thoughts before I go poking around with a VM.And yes,,this was blessed by Bob at the fest.Any help appreciated.

engtaz · Post by **engtaz** » Sun Sep 25, 2011 10:38 am

if amp got moved maybe components are touching or ping pushed in tube socket shorting something.

BillD · Post by **BillD** » Sun Sep 25, 2011 10:40 am

With no tube glow, start in the Power Supply ahead of the heater circuit.

Zoot Horn · Post by **Zoot Horn** » Sun Sep 25, 2011 10:41 am

Roy,, I'll take a peek,,tubes test well,,I did not move the amp--guess I'll start troublshooting.

kingman · Post by **kingman** » Sun Sep 25, 2011 10:50 am

Sorry to hear George,,,good luck.

Zoot Horn · Post by **Zoot Horn** » Sun Sep 25, 2011 10:53 am

found it-- IEC fuse-- can anyone look at theirs and tell me the value,--looks like a 250 ??AMP

Mr. M-500t · Post by **Mr. M-500t** » Sun Sep 25, 2011 11:05 am

I wonder why it blew so soon ? I'd still take a good look around and make sure nothing is shorting out !

Don · Post by **Don** » Sun Sep 25, 2011 11:09 am

Seems like Roy had that problem also at the fest. He thought it may be because he did not have an on/off switch installed yet.

Anyway, glad you found the problem George.

Zoot Horn · Post by **Zoot Horn** » Sun Sep 25, 2011 11:12 am

Don,, an on/off switch is being installed as we speak-- I was lazy and just used the power (IEC) connection.I've checked all of the solder joints and wiring,and I feel sure that it was me removing/replacing the cord for on/off.Can they make the writing any smaller on the fuse.

AlexSauter · Post by **AlexSauter** » Sun Sep 25, 2011 11:22 am

Zoot Horn wrote:Don,, an on/off switch is being installed as we speak-- I was lazy and just used the power (IEC) connection.I've checked all of the solder joints and wiring,and I feel sure that it was me removing/replacing the cord for on/off.Can they make the writing any smaller on the fuse.

Roy did have this same problem on his amp, he thought it was due to the AC current arcing across the terminals as you pulled the cord out or pushed it in.

Zoot Horn · Post by **Zoot Horn** » Sun Sep 25, 2011 11:27 am

Fuse rating please sir? Looks like it says F2 Al 250volt--I'm assuming it's a 2 am 250 volt fast or slow?

AlexSauter · Post by **AlexSauter** » Sun Sep 25, 2011 11:29 am

The fuse is 2A 250V fast blow

Zoot Horn · Post by **Zoot Horn** » Sun Sep 25, 2011 11:29 am

Thank you sir !!!

engtaz · Post by **engtaz** » Sun Sep 25, 2011 12:16 pm

Sorry I did not mention it before. Get spare fuses till switch is installed.

Zoot Horn · Post by **Zoot Horn** » Sat Oct 01, 2011 10:12 am

fuses,tubes,,all swapped-- certifiably DEAD now--

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Amp Casulity

Amp Casulity

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