Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Jack1962 on June 29, 2010, 05:13:17 pm

Title: Hammond L133 Power Transformer
Post by: Jack1962 on June 29, 2010, 05:13:17 pm

does anyone know , what power transformer to the Hammond L133 use's?

                                                 Rock On

Title: Re: Hammond L133 Power Transformer
Post by: topbrent on June 29, 2010, 05:40:31 pm

The L-100 series used the AO-43 power amplifier.  
-  Hammond organs were overbuilt, expensive, and durable.
-  The power transformer was spec'ed at 315-0-315 (and as a somewhat educated guess,) probably at least 150mA.  
-  You can use that transformer to power 6v6's without sweating.  It would probably handle 6L6/5881 without much complaint.  
-  For higher B+, go with a GZ34 for 410v or a SS rectifier for 445v.

(http://www.triodeamplification.com/sitebuilder/images/plexiproject2-288x216.jpg)
http://www.triodeamplification.com/18Watt.html (click the link for a cool project idea. Photos by triode amplification...he's a member here)

http://www.captain-foldback.com/Hammond_sub/schematics/L100_early.gif  Click link for a much larger version.
(http://www.captain-foldback.com/Hammond_sub/schematics/L100_early.gif)

Title: Re: Hammond L133 Power Transformer
Post by: Dave on June 29, 2010, 09:04:34 pm

It'll make a good 18 watter.

Dave

Title: Re: Hammond L133 Power Transformer
Post by: Jack1962 on June 30, 2010, 09:55:47 am

thanks guy's , actually I'm restoring the Hammond , it use's a 5U4G Rectifier Tube so I assume it powers the entire organ.

                                                   Rock On