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Post your Woodies

Discussion in 'Shock Brother's DIY Amps' started by screefer, Oct 16, 2020.

  1. tubegeek

    tubegeek Friend of Leo's

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    @teletimetx - that Knight is intriguing - do you know how the "anti-feedback" switch works?

    I really like this look, some great work on display. I'm a sucker for unusual grille cloth AND I love plaid, so @kleydejong gets three thumbs up. (Yes those are thumbs, not "woodies.")

    My very first tube DIY project was this combo, it's sort of a Princeton Reverb preamp connected to a Champ single-ended output. I rebuilt it at some point and it didn't really improve matters, so it's due for a second rebuild at some point. Anyway this is a trapezoidal pine cabinet, walnut (?) stain and shellac. Some upholstery fabric for the grille.
    20201017_091614.jpg
     
    Last edited: Oct 17, 2020
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  2. Vanzant

    Vanzant Tele-Afflicted Silver Supporter

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    9C6467A3-25A6-420C-9765-F09838353895.jpeg
    F88EFF9C-1280-4441-97EF-A72652EDD226.jpeg
     
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  3. screefer

    screefer Tele-Holic Silver Supporter

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  4. Squawker

    Squawker Tele-Meister

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    Tube-Town Molly - AC15/30 EF86 channel into an ECC99 output stage. Head shell from Tube-Town, treated with some flooring oil (similar to Tung oil).

    It's standing on a cheapy-cheap SubZero cab that's had the Tube 30 swapped for a 10" Creamback.

    Sounds so good that I haven't switched the AC10C1 on for a few months (and I love that amp).


    upload_2020-10-17_16-10-47.png
     
  5. screefer

    screefer Tele-Holic Silver Supporter

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    Nice head! Flooring oil? Got a pic of the container?
    I'm always looking for ideas.
     
  6. Squawker

    Squawker Tele-Meister

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    Thanks. It's this stuff... Tilja Floor Oil for indoor use, by Swedish flooring company Lundbergs. The can doesn't have any content details, but it's the usual wipe on, let dry, wipe on again, repeat. You could sand lightly between coats, or maybe buff a bit after the last coat. I didn't do too much, but I did go over the head shell with very fine sandpaper before starting. I was going to buy some gun stock oil, or the stuff for kitchen worktops, then I remembered I had this in the basement.



    upload_2020-10-17_16-42-3.png
     
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  7. teletimetx

    teletimetx Doctor of Teleocity

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    Good question! From an audible response, it seems to thin out the frequency response, and also trims the volume slightly.

    Apologies to all for a little thread drift.
    Looking at the schematic, it looks like it just bypasses a single capacitor in front of the eq section in the pre-amp. That’s what it looks like to me- but I would defer to more knowledgeable eyes. Here’s the detail look:
    0D9A605D-DDE9-4444-A706-8ACD863EE5FE.jpeg

    And here’s the whole circuit:
    CFDC009C-C10A-48EB-B313-566F892E9A5D.jpeg
     
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  8. tubegeek

    tubegeek Friend of Leo's

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    Thanks for the detailed info.

    It seems to me that what you hear makes sense. When the .047 and the .01 are in series, the result is a bit less than .01. So it'd thin out the bass. Anti-feedback in the speech PA sense, probably works as intended and certainly a VERY inexpensive way to implement it.
     
  9. awasson

    awasson Poster Extraordinaire Gold Supporter

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    I need a proper shop... Just not sure where I can put it. Currently I’m a fair weather carpenter. If it’s not raining, I can roll my table saw out and set it up with saw horses for the run off. I’ve got a 12” bee box cabinet not finished and a couple of Tele things in mid production.

    I did finish this amp.

    7E02AF2A-1DEA-45DF-A70D-5CFEFB50C743.jpeg

    And I built this tapped folded horn cabinet.

    916DD1A9-A837-491F-8AA4-6484478D7970.jpeg

    Oh and the speaker bar for my wife’s video/audio enjoyment

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  10. screefer

    screefer Tele-Holic Silver Supporter

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    I'm the same. I have a work station outside the shop door and just schlep my small Dewalt tablesaw and my Makita 2012 planer out in the beautiful B.C. weather...lol!
     
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  11. tubegeek

    tubegeek Friend of Leo's

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    That folded horn is a beast! Nice one.
     
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  12. Jazzerclean

    Jazzerclean Tele-Meister

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    I made the first one out of pine with a plywood speaker baffle. The first one is for an open back 1 x 10" combo.

    Now working on my second, a more upright closed back Swart stlye 1 x 12" combo with a sloping front made from a very old bee box.

    I had to reverse the boards so I could have the indented handles on the boards on the inside of the cabinet rather than the outside as it was originally. You can see the indented handles on the inside of the cabinet in the pic's.
    Many, many layers of paint had to removed as well, this one was not easy. 57f93a68-6df3-44c2-8bb5-5ce6986cd74c.png
     
    Last edited: Oct 17, 2020
  13. Jazzerclean

    Jazzerclean Tele-Meister

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    My new sloping front Swart style 1x12 is made out of what seemed a 1000 year old bee box too!
    It had only 64 (000) layers of old paint I had to strip off that was unbearably hard to get off.
     
    Last edited: Oct 17, 2020
  14. CraigB

    CraigB Tele-Afflicted

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    Wow, nice cabinetry, everyone!

    Here's my homebrew Harmony H400a in half-blind dovetail mahogany cab with walnut & padauk accents

    [​IMG]

    [​IMG]
     
  15. screefer

    screefer Tele-Holic Silver Supporter

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    Very nice woodwork!
    Do you have a schematic/layout? I read that these were 'widowmakers'. Did you brew up an isolation transformer?
    I also read that 400a was American and 400c Canadian.
     
  16. GARAGE HERMIT

    GARAGE HERMIT Tele-Meister

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    DSCF0326.JPG DSCF0329.JPG re-purposed an old draw stained & waxed, 12" FANE 15ohm speaker, amp is just a s/s lm386 chip with gain control only,
     
  17. CraigB

    CraigB Tele-Afflicted

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    Yeah, they are dangerous without a power transformer for sure. Even with a grounded three-prong power cord, I think connecting the filament string directly to the wall voltage is not a good idea. I used a 1:1 iso power transformer. I typically keep my hand-drawn layouts, I'll have to check to see if I kept that one when I get home. The schematic is available online. I got it from el34world.com.
     
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  18. CraigB

    CraigB Tele-Afflicted

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    Hi screefer - I took a pic of my layout for you. The PT I believe was either Amazon or ebay, and the OT was from Antique Electronic Supply

    [​IMG]
     
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  19. screefer

    screefer Tele-Holic Silver Supporter

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    Thanks tons!
     
  20. Nickfl

    Nickfl Friend of Leo's

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    Well, if we are posting hifi speakers too...

    I built this transmission line speaker earlier this year:

    IMG_20200414_220646.jpg

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    And just finished this floor speaker (Paul Carmody's amiga design) last week:

    IMG_20201023_143510.jpg
     
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