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Help only 3.3 vac to the heaters

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jcr1234

Post subject: Help only 3.3 vac to the heaters

Posted: Sun May 17, 2009 1:28 pm

Novice

Joined: Thu Apr 30, 2009 8:51 am
Posts: 84
Location: LA

I wired up the pt, ot, heaters, rectifier, mains, etc. I tested as instructed on p 33 of the build guide. Im only getting 3.3 vac to the heaters.

Any ideas?

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Stoo

Post subject: Re: Help only 3.3 vac to the heaters

Posted: Sun May 17, 2009 3:10 pm

Experienced

Joined: Sat Jul 22, 2006 2:59 pm
Posts: 480
Location: Vancouver B.C. Canada

jcr1234 wrote:

I wired up the pt, ot, heaters, rectifier, mains, etc. I tested as instructed on p 33 of the build guide. Im only getting 3.3 vac to the heaters.

Any ideas?

1, you're measuring from tube pin to ground instead of pin to pin.
2. you used the center tap of the filament winding instead of the two proper windings.
Stew

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coco

Post subject:

Posted: Sun May 17, 2009 3:54 pm

Holy Ghost

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada

There should be 3.3 VAC between each green - green yellow pair. First check that is true.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

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jcr1234

Post subject:

Posted: Sun May 17, 2009 5:45 pm

Novice

Joined: Thu Apr 30, 2009 8:51 am
Posts: 84
Location: LA

I was measuring tube pin to ground. Where should the ground lead from the meter be attached to?

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kurtlives

Post subject:

Posted: Sun May 17, 2009 6:43 pm

Expert

Joined: Sun Feb 17, 2008 4:47 pm
Posts: 960
Location: Toronto, Canada.

Use the AC setting and measure pin to pin.

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jcny

Post subject:

Posted: Sun May 17, 2009 6:43 pm

Experienced

Joined: Fri Jul 29, 2005 11:35 pm
Posts: 424
Location: S of Buffalo, NY

Anywhere on the chassis should do

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