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-   -   Material for Cards (HSVT) (https://www.vintage-radio.net/forum/showthread.php?t=124447)

Radio Tech 5th Mar 2016 12:26 pm

Material for Cards (HSVT)
 
Hello folks

Thought this might be of use, those of us who have a Mullard HSVT and have to make the cards for it, the material can be found on Amazon, the manufacturer of this is a company called Sign Materials Direct. The material itself is 0.5mm thick and it is Acrylic Perspex PETG and comes in A4 or A3 sizes and its a product made by Bayer.

Best wishes

Ken

frankmcvey 5th Mar 2016 3:57 pm

Re: Material for Cards (HSVT)
 
Hi, Ken,

The material should be fine, but at 4.68-ish for two cards, which is what you'll get from an A4 sheet, it seems a bit pricey if you need to make more than a few.

You might be better to go for Tufnol. RS are doing quite a good price for the 0.4mm stuff. Sheets are 590mm x 285mm and you get 5 sheets for 11.14. I reckon you should get 5 cards out of each sheet.

I've miked the cards out at between 0.6mm and 0.85mm. Much thicker than 0.85mm will jam in the slot. I reckon the 0.4mm should do you, but RS also do the 0.8mm stuff ( a bit dearer at 20 for 3 sheets)

Have you sussed out a punch yet?

Cheers,

Frank

Radio Tech 6th Mar 2016 4:29 pm

Re: Material for Cards (HSVT)
 
Hi Frank

No not yet, I am marking and drilling out the long way round, I just need someone to make the jig for me, I can not do it as I don't have the facilities to make it, you could make one for me please.

I will have a look at the tufnol material.

Best wishes

Ken

frankmcvey 8th Mar 2016 1:36 pm

Re: Material for Cards (HSVT)
 
Hi, Ken,

My younger brother runs a light engineering business in Dalbeattie, and he's kindly offered to make one for me. However, it's taking him forever, so I don't think that's an option. Mind you, being an precision engineer, I'm pretty sure he's going OTT on the job and turning out a masterpiece of toolmaking.

What I could do is to supply you the drawings/CAD files, so perhaps you could have one made up by a local engineering firm in your area.

BTW, apparently Tufnol is more easily worked if it's heated to 100C. At 4mm, it should cut quite readily with a paper guillotine.

I'll keep you posted.

Cheers,

Frank


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