Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: mxrshiver on October 30, 2022, 12:31:04 pm
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building a 2x 12AX7 preamp stompbox pedal, point to point. prioritizing cheap, compact and rugged build. figuring out power supply for opto-MOSFET relays, i wanna use a separate xfmr from the heaters because i plan to use heater elevation. i'd like to take advantage of low current demands and use somethin itty bitty and cheap like the Hammond 161C10 or the Zettler Magnetics BV301S12010-ZU, but i don't plan on using a PCB. so i'm looking for tips for mounting them securely enough otherwise. the former is a bit smaller than a 1" cube and weighs 1.27oz, the latter is more like 1.3"x1.1"x0.9" and probably more like 2oz.
the 3 methods i'm considering are:
- some sort of superglue either attaching it to the chassy itself, to a turret board, other xfmr, or multiple surfaces
- zip ties baybaaaayyyyy
- just hook the pins nicely around turrets and use plenty of solder
i'd love to hear comments on these ideas, or any others! i'm fairly electrically literate at least in the realm of tube circuits, but a novice for mechanical and construction type stuff (see i don't even know what category to call it lol), so please assume i know little to nothing! thanks for the help!
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Will the pins fit through the turret hole? If so just install the turrets on the board spaced such that all the transformer pins will drop inside the turret holes. Then apply solder sparingly. Should be very secure
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SuperGlue won't hold.
Shoe-Goo *may* hold, but I would not like to bet on it. (I have used Shoe Goo to bond wood to concrete, twice, and one is still holding. But it does not travel.)
Small iron, zipties will work.
And of course, drill a board. (Turrets are fancy-work.)
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what about eyelets instead of turrets for mounting the transformer? antique electronic supply even has smaller diameter eyelets if the transformer lugs are too close together for the standard size to work. that hammond has tabs that you can drill holes/file a slot for and then bend over the other side of the board
i would not use any sort of adhesive if you're expecting it to stay in one place very long (although if you use eyelets and the mounting tabs a little rtv silicone/hot glue (i have good results with the gorilla glue brand) between the transformer and the board is a good idea
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Second the silicone. Somewhat flexible to absorb shock and not come loose. Pretty sticky stuff. Could do that and a zip tie.