Tweed Super/Bandmaster build

Discussion in 'Shock Brother's DIY Amps' started by eslover, Jun 21, 2019.

  1. eslover

    eslover Tele-Meister

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    @King Fan thank you so much for the complement and excellent advice (especially bullet 3 - never thought of this!).
    I didn't realize that my images don't expand as large as they show on my phone, so I plan to post close-up shots of the filament wiring.

    @D'tar what you may think of being OCD is actually genius! You can check continuity of the traces without lifting the circuit board!!
    Plan on me implementing your idea in this build. :)
     
  2. King Fan

    King Fan Friend of Leo's Ad Free Member

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    I see your OCD and raise you one! I do the same thing on underboard wires, but I also do it even when bending topside wires *down* through eyelets. So far I’ve never had to lift a board. Knock knock. But it is marginally useful during assembly...


    Sent from my iPad using Tapatalk
     
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  3. D'tar

    D'tar Friend of Leo's

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    I see I'm with good company then!
     
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  4. JohnnyCrash

    JohnnyCrash Doctor of Teleocity

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    I’ve been trying to keep my heater wiring like this recently.

    None of my amps hummed, but it seems like the best way to keep both triodes separated for neat wiring to the socket and away from heaters.
     
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  5. eslover

    eslover Tele-Meister

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    What do you do when a hole won't fit three 20AWG wires?

    Hint: Here's a before and after.


    IMG_0748.JPG
     
    Last edited: Jun 28, 2019
  6. eslover

    eslover Tele-Meister

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    Today's exercise.

    IMG_0749.JPG
     
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  7. eslover

    eslover Tele-Meister

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    ...and some of the power section...

    IMG_0747.JPG
     
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  8. eslover

    eslover Tele-Meister

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    Just a little tidying up in the power section... Shrink tubes can really help a bundle here.

    IMG_0751.JPG


    The chassis is getting pretty hefty in weight.
    I'm worried that the weight of the PT will damage the cab and/or chassis if the amp is dropped accidentally.
    So, I went on a search for PT mounting brackets like the old bassmans used to have - Here's a picture (not mine) that I found which shows what I am talking about:

    1960 5F6A_TJPPost_PT Bracket.JPG

    But damned if I could find that little sliver of sheet metal anywhere.
    On a whim I went into Ace Hardware, looked around and lo-and-behold, I found the last two of these:

    IMG_0750.JPG

    The dimensions are nearly perfect for the tweed super and will mount the PT to the top of the cab with an extra #10-32 bolt perfectly flush. One possible issue is that it's not steel but zinc (pot metal?) and may only survive one drop if that...

    Do you all think it would be a waste to use these as a PT support bracket?

    Still excited. Oh, these brackets are only $0.59 a piece...the price of 1/2 a donut at Dunkin' Donuts!

    Whew, my lucky day!
     
    Last edited: Jul 1, 2019
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  9. Nickfl

    Nickfl Tele-Afflicted

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    I'd bet that any drop that broke those brackets would also break your cabinet.

    That looks sturdier than the one on that bassman transformer.
     
    Last edited: Jul 1, 2019
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  10. eslover

    eslover Tele-Meister

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    I can't believe I have no more 1.5K Ohm resistors anywhere.
    I had to put an order in. You can see one missing from the board on the V2 cathode in the original post;
    but I'll also need them for the grid stoppers.

    Getting close to finishing this...very exciting!
     
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  11. eslover

    eslover Tele-Meister

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    For those of you still following this thread, the chassis is complete. Passed all the continuity checks, and I will do the first start checks next week when my variac arrives.

    Tight fit, I'll never use a 3-1/8" wide board again!

    IMG_0785.JPG IMG_0786.JPG
     
  12. eslover

    eslover Tele-Meister

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    Just got a package from Kokomo, Indiana. These should give me some good vintage tone (after they're broken in)...

    IMG_0800.JPG

    They seem to fit quite nicely and follow my blue theme:

    IMG_0801.JPG
     
    Last edited: Jul 16, 2019
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  13. D'tar

    D'tar Friend of Leo's

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    Awesome!!! We get to hear this right?!
     
  14. eslover

    eslover Tele-Meister

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    Yes! I'll post audio...but the darn variac I ordered won't get here until Friday.
    I'm definitely getting very curious about this build...I just hope it isn't a dud!
     
  15. caspersvapors

    caspersvapors Tele-Meister

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    so did this turn out to your liking? I am also in the midst of a possible 5d4 build and stumbled across this. Does it breakup nicely?
     
  16. eslover

    eslover Tele-Meister

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    Been spending the better part of a week fixing a parasitic oscillation. Finally got it to disappear after shortening the signal path wires some (and fixing a few cold solder joints). Amazingly quiet. With guitar volume at zero and all pots at 12 on the amp it makes only a mild hiss and NO hum at all. But I get tons of hum when I turn the guitar volume up due to poor RF insulation in my home, lots of fluorescent lighting, computer and cell phone gadgetry creates a noisy environment. I hope to take the amp out to a studio later this week and take some quality audio. I'll post it as soon as I can.

    Nevertheless, hum aside, it sounds fantastic. Speakers are a bit tight but they'll break in soon enough.
    Good headroom, breaks up nicely at reasonable volume and that's with single coils; haven't tried humbuckers yet.

    The 5F4 was a great project. I originally wanted to do the 5D4 but switched at the last minute...but I'm sure that will be lots of fun to build.
     
    Last edited: Jul 23, 2019
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  17. eslover

    eslover Tele-Meister

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    As I play through this amp I can't help but be reminded of the sound of Eddie Cochran.
    (Playing is very rough... be nice)

     
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