2203 build, no power at speakers?

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JDW3
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2203 build, no power at speakers?

Post by JDW3 » Thu Feb 02, 2012 4:28 pm

I just finished my second build from George. I checked all voltages and bias twice. I'm not even getting a hiss from the speakers. (I checked the cab with an amp, no problems)

I used input cliff jacks on the outputs, possible problem?

I tried getting readings across the cliff jack and impedance switch. I was looking for the 13.4 ohms I have from the cab. Basically not getting a reading.

The PI resistors are all correct.

Is there a way to read the imp. switch to check for power? I hate to keep checking things with no load; not sure if the amp is seeing a load at this point.

Tubes are not redplating.

Much thanks!

OnTheFritz
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Re: 2203 build, no power at speakers?

Post by OnTheFritz » Thu Feb 02, 2012 8:04 pm

Are the speaker jacks grounded? Should have a wire going to a ground lug, very important!
"I don't like country music, but I don't mean to denigrate those who do. And for the people who like country music, denigrate means 'put down' " - Bob Newhart

JDW3
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Posts: 143
Joined: Tue Jan 23, 2007 11:57 pm
Just the numbers in order: 7
Location: Underneath Flint, MI

Re: 2203 build, no power at speakers?

Post by JDW3 » Thu Feb 02, 2012 8:14 pm

Yes, they are grounded.

JDW3
Senior Member
Posts: 143
Joined: Tue Jan 23, 2007 11:57 pm
Just the numbers in order: 7
Location: Underneath Flint, MI

Re: 2203 build, no power at speakers?

Post by JDW3 » Fri Feb 03, 2012 9:05 pm

I got it running!!

One of the output cliff jacks was bad, amazingly. Very confusing last couple of days. Ths standby switch is also suspect, making a thumping sound already!

But it works, and it cranks! My ears are ringing. Have to adjust the bright caps, at least.

Thanks Fritz.

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