Another BF Bassman find, AA165

[Baddog01]

I'm assuming you ment .22uf and not 2.2uf . The way you have it will work fine but it would look cooler if you had one cap instead of two. If she's quiet and sounds good your golden.

[TWANG]

those schematics are so hard to read. I would have sworn it read 2.2uF.
I have two 1uF in parallel.
Possibly.. that's why the crackle came back.

When I got it turning the volume up past 3/4 made horrendous crackle,
and the chassis got microphonic.

Now, it's there around 8. On the Bass channel, I haven't checked the normal ch. yet.

I'll reread with my magnifying glass and see if I'm wrong on the cap value.
Seemed odd to me!

I also am going to remove the rubbery board under the filter can.. I made a bakelite board but I kept the insulator board.
I'll put new and better material there.

I hooked up the mid pot. using the old ground lift switch hole.
I didn't have a 6.8K so I used 5.6K.. and I only had either 20K or 5K for a pot.
So.. I'm gonna keep this pot, but raise the R to 8.2K or so.
For now, anyway.

I don't like the bass channel a great deal. the normal is Fender to me for sure.
So I think I'll dump the .1uF cap, and change the switch to a bright cap
on/off. 120pF at first, then maybe higher.. depending.

I'm trying to find a way to change this to use the unused half of the second preamp tube.
So far, all I can find is talk and little detail.

[TWANG]

I blew up the schematic. it's .22uF.
I have 2uF. I'll get on that.
Had to use the pc to get it big enough to read.
good grief.

[ToneMerc]

those schematics are so hard to read. I would have sworn it read 2.2uF.
I have two 1uF in parallel.
Possibly.. that's why the crackle came back.

When I got it turning the volume up past 3/4 made horrendous crackle,
and the chassis got microphonic.

Now, it's there around 8. On the Bass channel, I haven't checked the normal ch. yet.

I'll reread with my magnifying glass and see if I'm wrong on the cap value.
Seemed odd to me!

I also am going to remove the rubbery board under the filter can.. I made a bakelite board but I kept the insulator board.
I'll put new and better material there.

I hooked up the mid pot. using the old ground lift switch hole.
I didn't have a 6.8K so I used 5.6K.. and I only had either 20K or 5K for a pot.
So.. I'm gonna keep this pot, but raise the R to 8.2K or so.
For now, anyway.

I don't like the bass channel a great deal. the normal is Fender to me for sure.
So I think I'll dump the .1uF cap, and change the switch to a bright cap
on/off. 120pF at first, then maybe higher.. depending.

I'm trying to find a way to change this to use the unused half of the second preamp tube.
So far, all I can find is talk and little detail.

Rather than continue to drift this original AA165 thread with modding other versions, perhaps you can continue this discussion in your own thread.

TM

[TWANG]

okey frokey!

[ToneMerc]

Finally circled the wagon on this one, recapped with Sprague TE hi temp lytics (Astron dual 25uF/25V was actually 310uF) on the main board, F&T lytics under the doghouse, all UF diodes, 3 wire AC cord, now fused on the hot side and a restored head cabinet by Amplified Nation.

Loaded with mid to late 60's RCA gray and black plate glass.

TM

[Baddog01]

Finally circled the wagon on this one, recapped with Sprague TE hi temp lytics (Astron dual 25uF/25V was actually 310uF) on the main board, F&T lytics under the doghouse, all UF diodes, 3 wire AC cord, now fused on the hot side and a restored head cabinet by Amplified Nation.

Loaded with mid to late 60's RCA gray and black plate glass.

TM

Do you have any noise issues in your amp? If you tap on the chassis does it sound like a microphonic tube? Just wondering.

[ToneMerc]

Do you have any noise issues in your amp?.

None

TM

[Baddog01]

Mine had a conductive board so I put nylon spacers between the boars and grounded all unused eyelets . Mines quiet now too.

Just thought I'd pass on my findings if you where having some issues.

Keith

[dcribbs1412]

Gotta say nice work TM
the Sprague lytics give it that old vibe
before and after pics one might think it was untouched
Nice restoration of a classic

Darin

[ToneMerc]

Gotta say nice work TM
the Sprague lytics give it that old vibe
before and after pics one might think it was untouched
Nice restoration of a classic

Darin

Darin, I like those TE caps and the majority of my D style builds have those as well. The hardest part was going behind whoever replaced that cap under the doghouse 40+ yrs ago. I ended up totally stripping the power board, fitting new eyelets and new jumpers.

Mike

[dcribbs1412]

Gotta say nice work TM
the Sprague lytics give it that old vibe
before and after pics one might think it was untouched
Nice restoration of a classic

Darin

Darin, I like those TE caps and the majority of my D style builds have those as well. The hardest part was going behind whoever replaced that cap under the doghouse 40+ yrs ago. I ended up totally stripping the power board, fitting new eyelets and new jumpers.

Mike

Thanks Mike
I may give those a try
are those are 25 or 50V TE caps?
How did the cab turn out?

Darin

[ToneMerc]

I may give those a try
are those are 25 or 50V TE caps?
How did the cab turn out?

Darin

Those cathode caps are 25V and the bias cap is 47uF/75V. The seller claimed that he had long lost the baffle and rear panel, which gave me even more leverage. Nevertheless, I sent Taylor some Mojo aged cloth and had him do the recover, make a baffle and rear panel. I might pull the tail logo from my 65 AB165 and install it here.

Mike

[Reeltarded]

The inside shot is stunning. It's perfect.