Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: Contributors :: Advertise


It is currently Jun Thu 20, 2019 12:00 am


All times are UTC [ DST ]





Post New Topic Post Reply  [ 7 posts ] 
Author Message
 Post subject: Baldwin Organ Amplifier
PostPosted: Mar Sun 16, 2014 10:50 am 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 18537
Location: Albuquerque, NM 87123
Can anyone identify this Baldwin amplifier? It uses six 6BQ5s, four 12AX7s and a 5U4. I need a schematic to help with the power and audio socket connections. Thanks.


Attachments:
IMG_3903.JPG
IMG_3903.JPG [ 158.01 KiB | Viewed 3169 times ]
IMG_3902.JPG
IMG_3902.JPG [ 106.26 KiB | Viewed 3169 times ]
Top
 Profile  
 
 Post subject: Re: Baldwin Organ Amplifier
PostPosted: Mar Sun 16, 2014 2:15 pm 
Member

Joined: Jul Wed 22, 2009 3:07 pm
Posts: 761
Hi Johnnysan,

From this e-bay listing it seems that this is a Baldwin 54A amplifier.
http://www.ebay.com/itm/Baldwin-Organ-Tube-Amp-Amplifier-transformers-guitar-6BQ5-/171265614859?pt=Vintage_Electronics_R2&hash=item27e039e40b

Good luck, Peter


Top
 Profile  
 
 Post subject: Re: Baldwin Organ Amplifier
PostPosted: Mar Mon 17, 2014 1:28 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 19934
Location: Warner Robins, GA
Looks like maybe the Leslie attachment had its own amplifier built on the main amp chassis.

You can easily make a mono bi-amped system with the amp if you don't replace transformers.

If you don't mind replacing the output transformers you can make this a stereo bi-amped system.

For stereo you would have an approximately 14 WPC push pull stereo amp for the bass-midrange then a nearly 5WPC stereo amp for the upper midrange-treble.

Either way you should have enough 12AX7 tube sockets on the chassis to make it happen including a simple crossover.


Top
 Profile  
 
 Post subject: Re: Baldwin Organ Amplifier
PostPosted: Mar Mon 17, 2014 3:15 am 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 18537
Location: Albuquerque, NM 87123
Thanks for the information on the model number. Now I just need to find a free schematic.


Top
 Profile  
 
 Post subject: Re: Baldwin Organ Amplifier
PostPosted: Mar Tue 18, 2014 3:19 pm 
Member

Joined: Jul Wed 22, 2009 3:07 pm
Posts: 761
Hi Johnnysan,

Here are some diagrams on Baldwin organ amplifiers, look at the JonsDiagrams.pdf file:
http://www.audiokarma.org/forums/showthread.php?t=197325
It is not on the 54A, but looks close enough. You can trace out the schematics of yours, and probably the connector diagrams in those files would help too.

Regards, Peter


Top
 Profile  
 
 Post subject: Re: Baldwin Organ Amplifier
PostPosted: Mar Tue 18, 2014 4:59 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 8745
Location: Beaver Falls, PA. USA
A friend in the radio club does organ service; I'll see if he has any Baldwin drawings.

_________________
Tim KA3JRT


Top
 Profile  
 
 Post subject: Re: Baldwin Organ Amplifier
PostPosted: Mar Wed 19, 2014 6:24 am 
New Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 9
Location: Cincinnati, Ohio USA
Hello Johnnysan:
I have the same amplifier in my collection. Its a Baldwin, from a model called an Orgasonic
the chassis # or model # is a 56PL. I am also looking for a schematic,so if you have any luck
please E-mail me. Bob


Top
 Profile  
 
Post New Topic Post Reply  [ 7 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 5 guests



Search for:
Jump to:  




























Privacy Policy :: Powered by phpBB