Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Oddvar on September 27, 2016, 09:11:48 am

Title: Hoffman Stout low output?
Post by: Oddvar on September 27, 2016, 09:11:48 am

Hi. Just finished my Hoffman Stout 18w.  It works, but the output is very low, like a 2 watter almost.  Any suggestions on where to look for the problem.  I have gone over it a few times, but it seems ok?

Title: Re: Hoffman Stout low output?
Post by: shooter on September 27, 2016, 09:34:09 am

since you have something to compare, start there, your volts vs the original stouts.  I like to start at the power rail, then move to V1, right til the PA.  Since dougs original works fine, find the component value that's off, the wire that's wrong and walla, jamming.  Take your time, this is the fun part, like playing the old game CLUE :laugh:

Title: Re: Hoffman Stout low output?
Post by: Oddvar on September 27, 2016, 02:48:12 pm

Found the mistake.  I had forgotten to link pin 4 and 5 on V2-

Thanks anyway...

Title: Re: Hoffman Stout low output?
Post by: shooter on September 27, 2016, 06:50:48 pm

easy as pie, now even more fun making the neighborhood dogs howl!

Title: Re: Hoffman Stout low output?
Post by: EL34 on October 04, 2016, 08:41:59 am

Guys,
That's why we have this post
http://el34world.com/Forum/index.php?topic=19361.0 (http://el34world.com/Forum/index.php?topic=19361.0)

And the lovely diagram that shows you how to trace out your build using the layout diagram

Title: Re: Hoffman Stout low output?
Post by: kagliostro on October 04, 2016, 08:56:11 am

Quote

............. now even more fun making the neighborhood dogs howl!

(http://i.imgur.com/bbrrKHP.jpg)


 :l2: :l2: :l2:

Franco