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  1. irpheus

    Connecting Kanthal A1 heating wires with each other ...

    Hmmm ... it seems that the attachment is not there ... will try again ... ... it seems it should be ok now ... Jesper https://files.engineering.com/getfile.aspx?folder=e779cc72-c9c6-44ae-b9dd-740ed1847002&file=A1_connections.jpg
  2. irpheus

    Connecting Kanthal A1 heating wires with each other ...

    Hi both, & thanks for your feedbacks [upsidedown] @XL83NL ... ... I don't have a drawing that shows in detail how the wires are connected but maybe a description can help (?): As it is the Ø1.2mm A1 wire is wound up in a coil and at the end of the coil this end is to be connected to a...
  3. irpheus

    Connecting Kanthal A1 heating wires with each other ...

    Hi All, I have a likely simple question that I hope one of you may be able to help with (and I also hope this is the right subforum) ... As it is I would like to connect two Kanthal A1 heating wires with each other (Ø3 and Ø1.2, at 1200 degr. C max), however, for various reasons I would...
  4. irpheus

    Very high purity copper electroplating - appreciate advice.

    Hi all, I hope one of you may be able to help with this ... and that I have posted in the right sub-forum ... As it is I have for some time now been searching for a very high purity copper electroplating process for high electrical conductivity, and have now ended up preferring...
  5. irpheus

    Where to find photographic stencils?

    @Compositepro: ... Hi ...& thanks for your suggestion. The thing is that this particular stencil from cougartron has some desirable mechanical qualities (soft, flexible, no adhesion, flat surface) which are just what I am looking for. Yes, it would be nice to have it made .. However, as it is...
  6. irpheus

    Where to find photographic stencils?

    Hi all, I may be in need of finding some photographic stencil "raw material" like this: https://cougartron.com/products/multi-use-stencil/ .. for etching experimentation. This particular stencil is useful due to flexibility so I would prefer a stencil with identical mechanical behavior...
  7. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi MDM ... this time I got a notification ... fine ;-) I use a mill that I have built myself out of G50 cast iron rectangular rods (with good guidance from an experienced CNC builder). It is designed to not be too big so that it fits in a relatively small area of ~ 95*95 cms - yet still have...
  8. irpheus

    Annealing Copper without oxidation - what is needed?

    @mdm55: Hi MDM ... and thank you very much for considering and replying again! And then I again notice that I haven't received any notification email (even if it should be on according to settings) which is the reason I reply this late. This sounds like good suggestions and I will look into...
  9. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi ... @mdm55: First, sorry for my late reply - for some reason I wasn't notified with a "new reply" email as I normally am (or I may have missed it, of course). .. I think it sounds like a feasible way to go so I have ordered a bit of titanium foil and coincidentally I also have some...
  10. irpheus

    Annealing Copper without oxidation - what is needed?

    ... came to think of a P.S.: ... there isn't by any chance a flexible tube material with the same qualities as SS ... Just hoping here as it would be simpler ... [purpleface] Cheers, Jesper
  11. irpheus

    Annealing Copper without oxidation - what is needed?

    @mdm55: Thank you also for suggesting ... Reading your post I came to think of if - assuming a vacuum chamber - the normal moisture absorbent "grains" used e.g. in a shed would be sufficient to eliminate the moisture issues with ceramic insulation? I.e. - if one places such a pouch of moisture...
  12. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi All & thanks again for your very helpful feedbacks [wink] @Compositepro: My goodness! When I read this sentence of yours I had one of those moments where I was thinking why I hadn't thought of this before .. ?? The annealing chamber I've made places the ceramic insulation outside of the...
  13. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi again ... Hmmmm - as you seem to be quite knowledgeable about annealing & vacuum I wonder if you may also know of a sealant that will withstand up to 800 degr. C - and maybe, just maybe will also work in a vacuum chamber context? I've found 3M 1137 but it seems quite costly so if you might...
  14. irpheus

    Annealing Copper without oxidation - what is needed?

    Thanks B.E. ... will look into it ... Cheers, Jesper
  15. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi B.E. .. thanks for the suggestion ... Would it be something like this...
  16. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi - good morning ... @dgallup & WKTaylor: ... Yes, it is a good point because, yes, normally I would be able to do so. But I would like to anneal other things as well and the wire sizes/shapes I would like to anneal are not readily available already annealed. @3DDave: Thank you also for...
  17. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi both - & many thanks for your feedbacks! ... What you write is indeed food for thought ... From reading your feedbacks it does, however, seem that vacuum annealing is not the simplest way to go - at least not if I want to do this in a "kitchen table" way. Will ponder ... please feel...
  18. irpheus

    Annealing Copper without oxidation - what is needed?

    Hi all, I have an annealing chamber question that I hope one of you may be able to help with ... As it is I will soon be in need of dead-soft annealing copper wires and to this end have built a small annealing chamber from Stainless Steel (SS) surrounded by a ceramic insulation. Before...
  19. irpheus

    How to do a rapid etch of tracks in very thin aluminum foil?

    @compositepro: Hmmm ... thanks for your feedback. As I understand it in the H3PO4/HNO3 etchant the HNO3's main function is to eliminate the oxide layer thus allowing the H3PO4 access to the aluminum. Also, in the article I linked to in the previous post (microchemicals) an elevated temperature...
  20. irpheus

    How to do a rapid etch of tracks in very thin aluminum foil?

    Hi again, The issue is that with longer etch times the aluminum tends to release from the mylar. I am not (yet, I hope) quite sure why this happens but I suppose the etchant somehow creeps in under the tiny non-fused parts of the mylar/aluminum interface. This is why I assume that a rapid etch...

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