Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: wilsonsk on November 11, 2016, 01:15:26 pm

Title: Hammond Amp Guitar Amp Projects
Post by: wilsonsk on November 11, 2016, 01:15:26 pm

Hi,


I have been using a basically stock AO-43 for the power amp portion of a guitar amp and it works great. I play keys as well and have a the following amps on hand:


AO-29 (field coil)
AO-15
AO-43




What does anyone have for guitar amp project schematics using these?


I realize the AO-15s are kind of odd balls, being biamped and all, but again, I have them laying around.


Thanks,


Steve


Steve

Title: Re: Hammond Amp Guitar Amp Projects
Post by: sluckey on November 11, 2016, 01:39:01 pm

I've seen several AO-29 conversions. A common complaint is "my B+ is too high", especially the early field coil versions. I don't have any hands on experience with the 29 and have never had any interest in obtaining one.

I'm not familiar with the AO-15 and have never seen any projects using it.

AO-43 is very popular. I used the iron from one to build a Plexi 6V6. Others have converted them to Deluxe Reverbs. Do a forum search to find out more. I have two more sitting on a shelf.

I have successfully converted AO-39, AO-44, AO-43, and AO-63. You can see these projects on my website.

Title: Re: Hammond Amp Guitar Amp Projects
Post by: wilsonsk on November 11, 2016, 02:46:28 pm

Thanks Sluckey!


Where can I find your website? There is probably a link I missed in the post.


I believe my other AO-43 will be next, then I am going to try something with the AO-29 and 6L6s.


I have an AO-44, what did you do with that? Do you have schematics?


I have searched the forums and archives and there are threads all over the place, I was hoping to create maybe more of a meeting place for the topic if possible.


Other ideas anyone?

Title: Re: Hammond Amp Guitar Amp Projects
Post by: Ed_Chambley on November 11, 2016, 02:51:30 pm

Under Sluckey's name click on the globe icon.  That will take you to his stuff.  Get it all while you are there because nothing last forever. :icon_biggrin:

Title: Re: Hammond Amp Guitar Amp Projects
Post by: John on November 11, 2016, 07:41:42 pm

www.sluckeyamps.com (http://www.sluckeyamps.com)

Title: Re: Hammond Amp Guitar Amp Projects
Post by: wilsonsk on November 12, 2016, 08:33:57 am

Thanks!


Now if I can just get some AO-15 ideas  :icon_biggrin:

Title: Re: Hammond Amp Guitar Amp Projects
Post by: sluckey on November 12, 2016, 11:00:11 am

Got a schematic for the AO-15?

Title: Re: Hammond Amp Guitar Amp Projects
Post by: rlh5599 on November 12, 2016, 02:58:27 pm

Here's the one I did, I am in the very slow process of adding a 1 tube reverb.  If the holes hadn't already been drilled for the controls and jacks I may have done the faceplate differently, but it works.

http://el34world.com/Forum/index.php?topic=17974.0 (http://el34world.com/Forum/index.php?topic=17974.0)

Title: Re: Hammond Amp Guitar Amp Projects
Post by: wilsonsk on November 12, 2016, 06:14:54 pm

AO-15 Schematics and Diagram