Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: tubenit on November 28, 2010, 04:05:37 pm

Title: Tweed OD Lite revised
Post by: tubenit on November 28, 2010, 04:05:37 pm

Some time ago, I shared a schematic for my Tweed OD Lite with reverb. I just finished converting my son's Texas Raptor into a Tweed OD Lite and changed some things when I did his. The reverb sounds really good on his amp.

His amp is a little brighter tone wise than mine. And it seems to be more versatile being able to dial clean to overdrive in. I used the second gain stage of the 12A_7 instead of the 5879 as the OD/boost stage. It's sort of like Hoffman's hotswitch mode.

soundclip here:  http://www.soundclick.com/player/single_player.cfm?songid=9929816&q=hi&newref=1

The clip is pretty mediocre and I did it in one take and left the glitches in, but you can get some sense of the tone hopefully.

(if a window comes up and asks if you want to close it, just click "no")

Just thought I'd share this for anyone who may want the Tweed OD type tone but has a small combo amp.  

The SCH file is at the bottom of this thread here:  http://www.el34world.com/Forum/index.php?topic=8387.0

With respect, Tubenit

Title: Re: Tweed OD Lite revised
Post by: Geezer on November 28, 2010, 05:25:57 pm

Whoa! That sounds REALLY GOOD!

The OD is smooth with a touch of grit to it (just like I like it!).

I haven't looked @ the schem yet, but I'm going to do so right now......

Thx for posting that!   G

Title: Re: Tweed OD Lite revised
Post by: PRR on November 29, 2010, 10:28:42 am

I still don't see how you get reverb out when the reverb return point is attached straight to the power supply?

Title: Re: Tweed OD Lite revised
Post by: tubenit on November 29, 2010, 11:03:07 am

Thanks PRR!  I appreciate you catching that. Schematic drawing error.

There is a typical 100k resistor on the 6pin plate of that tube.

With respect, Tubenit