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Hoffman Amps Forum image Author Topic: Stout TMB voltages  (Read 2463 times)

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Offline lvrocker

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Stout TMB voltages
« on: April 28, 2018, 07:23:33 pm »
Hi all, finished up the wiring on what is my second ever build...still learning... so the Stout powered on (yay) and am starting to test some voltages on the 5y3 and right off I'm getting 440 vdc on pin 8 also board connections a, b, c and d....absolutely no voltage drop at all after each filter cap. Connections seem fine, I'm using a classic tone marshall 18 watt power transformer rated 290-0-290. Curious as to why these readings are so high? FWIT pins 4 & 6 are 325 vac which I believe are fine. Thanks for any help!

Offline BruceF

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Re: Stout TMB voltages
« Reply #1 on: April 28, 2018, 07:28:57 pm »
Are the tubes installed?

Offline lvrocker

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Re: Stout TMB voltages
« Reply #2 on: April 28, 2018, 08:11:21 pm »
just the rectifier as of now

Offline PRR

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Re: Stout TMB voltages
« Reply #3 on: April 28, 2018, 08:53:43 pm »
You need a load to get a voltage drop.

Now that you have proved "not dead", give it some work to do. Install tubes.

Offline lvrocker

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Re: Stout TMB voltages
« Reply #4 on: April 29, 2018, 01:24:01 pm »
yep, installing tubes brought things more to normal voltages. I'll have to remember that...thanks guys

Offline BruceF

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Re: Stout TMB voltages
« Reply #5 on: April 30, 2018, 04:12:54 am »
Cool.  Glad to hear no problems.

 


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