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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Mon May 18, 2015 10:40 pm
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Chris,

How's the tone and volume of the modified cab?


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Tue May 19, 2015 4:30 am
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The overall changes are positive, I felt like I had lost some of the range when i went to the piggyback cab from the two 1x12 open backs, opening the back up further definately made a big difference.
It has made me into a firm believer in open back cabs for guitar.
Nikola I would say it was about 40% removed from the back, If your worried about vintage integrity then as others have suggested get yourself a sheet of plywood and make a new back with an opening and save the original in case you want to sell later, my back had already been hacked so............
I otherwise wouldn't have done it myself, glad I did, the sound improvement is HUGE !
Like taking a blanket off the amp or pulling the baffles out of a Harley :shock:

A/B with the new Bassman 10 in my other thread and its obvious what a difference a sealed back cab makes on overall sound.
Image

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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Tue May 19, 2015 8:13 am
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That 2 x 12 inch sealed cab that I had made, seems very efficient. Crank the Bassman to "4" and it is LOUD. Would be interesting to open the back and see if that allows you to turn the amp up a bit more --- to get into OD.

A thought... :D


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Tue May 19, 2015 1:37 pm
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I would have to say yes, I think the closed back is certainly louder (from the front side) than an open back and so opening up the back should give you a bit more travel from your volume pot.

Its all based on my ears and not a decibel meter so...................

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Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Fri Jun 12, 2015 12:38 pm
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Just wanted to share the latest on the 68/69 bassman
I almost sold it, went down plugged in and changed my mind, Fickle old man LOL !!!
Thought the Bassman 10 was enough for me, well it is sweet, but that massive iron OT on the 69 has a bit mopre authority in the notes.

Image

Pulled the Chassis on the 69 to check bias and took a few shots

Image

Dig Them Jupiter coupling caps 8)

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Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Fri Jun 12, 2015 2:36 pm
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Chris, I like those Jupiter yellow caps, too. Tone is similar to the Blue Molded. IMHO.

I would be difficult to give up on that drip edge Bassman. A great amp, classic Fender tone.


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Sat Jun 13, 2015 4:59 am
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Exactly why it will be fought over in my will :mrgreen:

I'm restless when it comes to gear , always looking for a project, you guys turned me into a circuit junkie !
Nothing beats finding a well worn Fender and making it sparkle all over again
The silverface stuff is now nearly 50 years old and still pumping out sweet tone (when properly cared for) and it was the ugly step child so......
That says a lot for the guys and gals who made this stuff back in the day.

And what seams to be a worn out piece of gear many times isn't and just needs a little minor surgery to get it back up and singing like new, to me that holds a lot of promise for future musicians.

Here is hoping some hold out for tone and don't get the digital dumb down 8)

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Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Sat Jun 13, 2015 6:12 am
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Chris, three killer words (for many reasons :lol:)... "Blonde Era Bassman." 6G6-A or -B head unit.

You didn't hear this suggestion from me.


http://ampwares.com/amplifiers/fender-b ... a-bassman/


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Sat Jun 13, 2015 8:29 am
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I would love to mod the Bassman 10 normal channel, now that the Studio channel is modded, who cares.

Gut that thing and start over

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Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Tue Jun 30, 2015 2:15 pm
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My sweet little 69 Bassman head finally has Piggyback mounting bars for the 2x12 cab !

Found these guys on evil-bay and got em for 10 bucks shipped, sorry if your the seller and you see this, no one else bid :oops:

According to the seller these were made for him or her by a friend with a machine shop, sure they are black and not chrome but for ten bucks !!! whatcha gonna do ?

Image

heading down to see if they work :mrgreen:

Now I just need a set of 16" tiltback legs, now those gotta be chrome ! 8)

_________________
Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Profile
Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Mon Oct 26, 2015 5:44 pm
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Well I picked this weird one up today
Most date codes are 1967 and a few 1968, it has drip edge trim
However the face plate and logo are mid to late 70's

Who would put a 74 or later faceplate on a real 68 ??????

Image
Image
Image

_________________
Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Profile
Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Mon Oct 26, 2015 5:46 pm
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more pictures of the oddity

Image
Image
Image

_________________
Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Profile
Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Mon Oct 26, 2015 5:48 pm
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and more
Yep new electrolytics soon !
Image
Image
Image

_________________
Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Profile
Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Mon Oct 26, 2015 5:51 pm
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Just when ya thought i couldn't find another sweet Bassman to mess with !
:mrgreen:
Image
Image

And where am i gonna find a proper black line faceplate for a 68 Bassman ????

_________________
Keepn' the Blues Alive

2004 50th Ann. Limited edition AMSE Stratocaster
2017 50's Baja Telecaster BSB

1968 Bandmaster with 2X12 cab C-rex speakers
VHT Special 6 Ultra combo

Visual Sound Route 66
Cmatmods Signa Drive


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Profile
Post subject: Re: 68-69 drip edge Bassman /circuit changes
Posted: Mon Oct 26, 2015 9:47 pm
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Chassis looks early 1968. Two prong accessory outlet. Date stamps on chassis and the dates on the iron.

I guess is re-grilled the cab. Used an available face plate (later silverface era) & logo. Are the tubes vintage US makes?


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