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Fender Bassman AA165

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  • Fender Bassman AA165

    Finally got to take a look at this amp.......it has the 2 prong plug which will be changed.....and remove that death cap........jacks need to be cleaned......pots were noisy so I cleaned them.....tube sockets look very good........however those bear claw retainer clamps have to go...I'll use the spring retainers here....All caps are original so I will have to replace them....speaking of caps, the ones under the doghouse are rated for 500V with a surge rating of 550V....I don't see modern electrolytics marked like this....I am going to change the plate load resistors and also the grid/screen resistors on the outputs as well.....the tubes read very high on the emissions tube tester however the pins look like they could use a good scrubbing...the output tubes don't read as good as the pre amp tubes.......this was just a quick check out as I haven't plugged in a bass guitar yet.....but will do so tomorrow.....there is a pot there that looks like a bias pot......not quite sure as I have to get the proper schematic...either that or a balance pot.....if anybody has anything to add to the list of things to check fire away......Will not be on line Thursday and Friday...Thursday is my birthday and Friday is.....you guessed it.....recovery day.......
    Cheers,
    Bernie

  • #2
    Schematic here:

    http://elektrotanya.com/PREVIEWS/634..._sch.pdf_1.png

    These guys have some 500V axials:

    https://www.tubesandmore.com/
    "I took a photo of my ohm meter... It didn't help." Enzo 8/20/22

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    • #3
      Originally posted by bsco View Post
      ...All caps are original so I will have to replace them.
      Did you mean all "electrolytic" caps? There is no compelling reason to shotgun replace all the caps in an AA165.

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      • #4
        Originally posted by Tom Phillips View Post
        Did you mean all "electrolytic" caps? There is no compelling reason to shotgun replace all the caps in an AA165.
        actually, yes...The electrolytics are all original and some of them have blisters on the ends.....I have no intention of replacing the other caps unless I find one leaky...sorry about that mis-understanding Tom.....
        Cheers

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        • #5
          Happy Birthday Bernie.
          Only a day for recovery?
          Originally posted by Enzo
          I have a sign in my shop that says, "Never think up reasons not to check something."


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          • #6
            Wow!......I missed that part. Happy birthday from me, too!

            Click image for larger version

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            "I took a photo of my ohm meter... It didn't help." Enzo 8/20/22

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            • #7
              Originally posted by g1 View Post
              Happy Birthday Bernie.
              Only a day for recovery?
              Well......................I was trying to be modest!!

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              • #8
                Originally posted by The Dude View Post
                Wow!......I missed that part. Happy birthday from me, too!

                [ATTACH=CONFIG]33738[/ATTACH]
                Your smiley face is not right.......only one beer.......there should be at least 12 there....and I lied......I am having a few now....I guess my birthday came early and will last longer than expected......thanks guys.....

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                • #9
                  Originally posted by bsco View Post
                  Your smiley face is not right.......only one beer.......there should be at least 12 there......
                  Maybe the other 11 were already gone?
                  "I took a photo of my ohm meter... It didn't help." Enzo 8/20/22

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                  • #10
                    Seems like you are on the right track Bernie.
                    Happy Birthday.

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                    • #11
                      Originally posted by The Dude View Post
                      Maybe the other 11 were already gone?
                      Yeah....I know.....I drank them already....!!!!

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                      • #12
                        Originally posted by Tom Phillips View Post
                        Seems like you are on the right track Bernie.
                        Happy Birthday.
                        Thanks Tom......actually, I have already started....have a cold one for me.....
                        Cheers.........

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