Stingray5funk
Member
Does anyone have plans for a pcb board for a passive di box that can use a transformer with pins
PASSIVE di box pcb ?
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Ricardus
WILL SOLDER FOR FOOD
This is actually a good idea, and should be really quick and easy for anyone who knows how to design PCBs. Kinda like with the Bo Hansen PCB, make it so it can accept 2 or 3 transformers, and then just put input and output pins, and voila.
johnchantler
Well-known member
which transformers would make a shortlist?
Ricardus
WILL SOLDER FOR FOOD
I would think a mix of low, mid, and high end (kinda like the Bo Hansen). For example I built a passive DI out of a Lundahl 1530 that I was fortunate enough to get for free. But I wired it point to point.
https://www.lundahltransformers.com/wp-content/uploads/datasheets/1530.pdf
If OEP has something that should definitely be there.
johnchantler
Well-known member
johnchantler
Well-known member
For folks in Europe, there is also UTM — but I haven't looked at what would be most suitable and can't tell if their listed prices include VAT or not... utmindustry.com
Ricardus
WILL SOLDER FOR FOOD
Not sure what Igor has that fits into this category.
johnchantler
Well-known member
Jensen for high end US option?
https://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-db-epc.pdf
https://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-db-epc.pdf
Ricardus
WILL SOLDER FOR FOOD
I just asked Igor what they offer in a DI box trafo for PCBs.
DIY Recording Equipment offers a kit with various trafo options. The kit includes connectors, a nice chassis, PCB, and trafo for between $60 and $150 total— a pretty good deal. If you ask nicely, Peterson may actually be able to provide parts a la carte, but I'm not sure he would do that. His PCB may be just the thing you need.
https://www.diyrecordingequipment.com/collections/studio-essentials/products/ferrite-di
https://www.diyrecordingequipment.com/collections/studio-essentials/products/ferrite-di
Ricardus
WILL SOLDER FOR FOOD
I think the point of a lot of this is so we don't have to buy from anyone.
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You dont need to do a PCB for that,
a passive DI box is such a simple circuit that if you use a transformer with Pins you can just use veroboard, easy and cheap enough
Vero doesn't do much good when the transformer's pins are spaced in a manner that doesn't fit the grid (I've actually toyed with the idea and the few trafos I tried didn't line up with the board at all.) I did a couple of DIs with the transformer upside down & secured with a zip tie run through a couple of holes in the side of the enclosure. They're ugly, and only for home use, but so far they've held up to my rather careless handling of them. A versatile pcb seems a much more elegant way to go though.
Ricardus
WILL SOLDER FOR FOOD
Agreed.
johnchantler
Well-known member
I don't think it's anything yet... but I can't see it being too hard to make it so both self-etch and fabhouse/gerbers would be possible. I don't have time to do it myself for a little while. Just building some Bo Hansen DIs which should cover my own immediate needs.
MidnightArrakis
Well-known member
Send me a schematic of the DI that you want to build, along with a Parts List of >> ALL << of the parts that you want to use (MFG Part Numbers, datasheets, etc.) and I will come up with the stuff (i.e., various file formats) that you will need to either "etch-your-own" PCBs or to send to a PCB shop to have them made for you. It really ain't that hard to do, but I need to know -- WHAT -- it is that you want to use for your personal project here!!! I am....."Standing By".....
No need to stand by for me Midnight, I'm quite capable myself.
I wasn't certain what the OP and end-user scenario was intended for, then when a post above said "so we wouldn't have to buy them", which means to me must be a self-etch request.
I have a couple bare-minimum self etch board artwork already, wasn't sure if I should post them here.
These are not full boogie DI box boards, just passive bare minimum boards to mount the transformers and toss 'em in a (1590B) box.
I wasn't certain what the OP and end-user scenario was intended for, then when a post above said "so we wouldn't have to buy them", which means to me must be a self-etch request.
I have a couple bare-minimum self etch board artwork already, wasn't sure if I should post them here.
These are not full boogie DI box boards, just passive bare minimum boards to mount the transformers and toss 'em in a (1590B) box.
Ricardus
WILL SOLDER FOR FOOD
I can say however that Midnight's work is exceptional.
