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SEX amp construction pics

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i promised pics of the construction of the SEX amp at the buttock lobblehead meeting, and here they are.
to navigate through the pics, you can either do thumbnails or click on whichever half of the picture in the direction you want to go. (click on the right half of the pic to go to the next one; left half to go back one)
we slacked off a little on the wiring pics, but the top plate construction pictures follow every step.
enjoy!

SEX amp construction pics (Open in New Window)

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Re: SEX amp construction pics - Brad Brooks 20:38:30 01/06/06 (0)
Great Job!
Re: SEX amp construction pics - Dyna Saur 11:28:08 01/06/06 (6)
Very Nice! I noticed the stepped attenuator - I have the same or nearly identical 100K version fron Hong Kong, that will go in when I do the iron / cap / C4S upgrades. This answers my basic question whether or not the attenuator will fit on the chassis plate without extra metalwork. I have two versions of the attenuator, one in this form factor, the other is the "short and fat" version, on which the resistors extend out radially, and the switch is shorter, so the total diameter is nearly 3 inches, but the length (depth) is about half. Definitely not SEX - rated... FWIW, this one came from Taiwan, and the attenuation increments are slightly different.
Coin base 6DN7s, and then of course, the prerequesite couple of glasses of good cold "lubricant" to help one along with the assembly ;-)
/ed B in NH
- stepped attenuator - planetWav 12:08:22 01/06/06 (5)
  that is the 100k version from hong kong that we put in there.
  it took a little finesse to get it in; we had to move the volume hole back about quarter inch or so (we used a file to create an elongated hole rather than trying to re-drill a hole with no center).
  the hong kong attenuators don't give you much real estate to hook up the in and out wires, so i made some little leads out of silver to hook those to...made the installation go a lot easier.
  the cold lubricant left a residue on my brain that fogged up the soldering process a little (day after new years), but the sex worked on the first try with 3 pairs of eyes doing the checking.
  - Re: stepped attenuator - gogzhad@hotmail.com 18:18:49 01/06/06 (3)
    How did you like the overal range of volume with that attenuator?
    - Re: stepped attenuator - planetWav 07:05:57 01/07/06 (2)
      the attenuator is one of the 100k versions, and operates just like a regular volume pot, with the same volume range.
      crank it to the left, and you can't hear anything; crank it to the right and it goes to 11. if you check the resistance at full volume, there was little or no resistance between the in and out tabs, indicating full volume, just like a pot.
      the 23 clicks were at good intervals, and close enough together that you weren't looking for a step in between two steps to be at a comfortable listening volume.
      hope that helped.
      - Thanks - exactly the info I was seeking (nt) - gogzhad@hotmail.com 12:39:25 01/07/06 (1)
        
        In Reply to: Re: stepped attenuator posted by planetWav on January 7, 2006 at 07:05:57:
        
        nt
        
        Re: Thanks - exactly the info I was seeking (nt) - Dyna Saur 05:11:57 01/09/06 (0)
        
        In Reply to: Thanks - exactly the info I was seeking (nt) posted by gogzhad@hotmail.com on January 7, 2006 at 12:39:25:
        
        The Hong Kong ladder "stepper" that I have, has -3 dB at "max" volume, it is wired so that position 24 (if it had one) would be straight through. Min volume setting is -60 dB. (100K / 100 ohms)
        /ed B in NH
  - Re: stepped attenuator - Bob W 12:43:55 01/06/06 (0)
    I put in the same one......had to do some minor surgery on the base so it would fit.
    Sure is FLAT out there
    "Music frees the mind from the tyranny of conscious thought"

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