Take a look at this...

Agileguy_101

Master of his Domain
So I was browsing Craigslist last night and I found a '65 Bassman. This one is quite unique however - I'll put the text and pictures here so that when the ad is down people can still see it.

Up for sale is one 1965 Fender Bassman Head - Black Face. Filter caps recently replaced and the amp is in great working order. Boogie modification done to the left channel in 1981 with the normal channel left in it's original condition. Unbelievable sound for the Guitar. Email or phone me for any question you may have. This is a blues Guitarists dream amp!

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So I emailed the guy asking what he knew about the mods done. Here's his response:

The mod was done in the early 80's by a friend who was extremely skilled in electronics. Many of my friends who had Fender heads at the time had this done. As well as I understand it he used what is called a fetron in the left channel to boost the gain output. This is similar to what Mesa Boogie did in the creation of there amps as the first Boogie was created using a Champ or a Princeton with this type of modification. Carlos Santana was said to have popped by the shop and heard the sound of this amp and said "Man this thing really boogies." Thus the name was born. The right channel was left in tact on my Bassman to operate under it's original specs. He also included a foot-switch input on the back panel as well as a line out for direct input into a board. That's all I know at this time. You may want to research Fetrons and how they are used in amp modifications. I will provide a link to a brief description.

http://www.harpamps.com/micKqanda/What-is-a-Fetron.html

I've never heard of fetrons before, and I'm quite intrigued by this mod. I'm not particularly fond of the normal channel on my Bassman, and I wouldn't be surprised if I ended up having it modified someday. Does anyone else have a modded Bassman? I'd love to learn more about more complex mods like the one above.
 
Re: Take a look at this...

Could sound great, but what makes Bassman's sound is 410 on P10R's with 5/16 inch baffle, so before modding amp I would first try to fit a right cab and recreate the sound it was recognised for.
 
Re: Take a look at this...

I don't see why anyone would ever mod a vintage bassman to sound like a boogie ? Just get a boogie if thats the sound you want. Or you can always put a pedal in front of it they take pedals really well.
 
Re: Take a look at this...

the original boogies were modded fenders so this isnt a crazy idea

the tweed bassman sound has lots to do with the thin baffle and 4x10" but the bf bassman had none of those things and is a totally different beast.

i modded the normal channel of my bf deluxe reverb to be a dry fatter higher gain channel so i would actually use it
 
Re: Take a look at this...

I don't see why anyone would ever mod a vintage bassman to sound like a boogie ? Just get a boogie if thats the sound you want. Or you can always put a pedal in front of it they take pedals really well.

Well if you've ever played a BF/drip edge SF, you probably know that the bass channel isn't very usable for guitar. The bass channel on mine was modded, albeit not too heavily, so I can't say how it sounds stock for guitar. I do remember plugging into an old drip edge SF at the local GC once and I didn't like the bass channel much. It actually makes a lot of sense to mod bassmans. Considering they're cheap as it is, most mods will have little to no negative impact on the resale value. The guy above is selling his for $750. I've seen stock BF Bassmans go for less than that.

I'd definitely be open to modding mine to have the bass channel sound totally different. If you don't like the first channel, I don't see why you wouldn't mod it - provided you're a gigging musician and not seeing the amp as a collector's item.


Could sound great, but what makes Bassman's sound is 410 on P10R's with 5/16 inch baffle, so before modding amp I would first try to fit a right cab and recreate the sound it was recognised for.

Like jeremy said, tweed and bf bassmans are completely different animals. No way in hell would I modify an original tweed bassman, it's a collector's item.
 
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