Tube 6E5C - Page 1
Forum section: electronics / beginners

author: just5554
author_rank: Contributor
timestamp: June 20, 2016, 07:51:10 pm
content: I found 6E5C tube in the village, saw magic eye project and really want to try.Q:https://www.google.com/search?q=6e5c&client=firefox-b-ab&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiAztnl86zNAhVLFSwKHevQDIAQ_AUICCgB&biw=1280&bih=913#imgrc=hhtAYDve5ZwZOM%3AHere i need 250V DC, right? so just put bridge rectifier and 0.01uF cap? 6.3V should be AC? Oh, and where goes 250V neutral (or -)Thank you!

author: Gyro
author_rank: Super Contributor
timestamp: June 20, 2016, 08:11:58 pm
content: That had better be a mains isolated 250V! You need to use an isolating transformer, or two step down transformers back to backThe 6.3V can be AC (rms) or DC, doesn't matter.The negative side of the 250V DC goes to the cathode (pin 8 ).I love the glow of magic eye tubes. I takes me right back to sitting on the floor in front of my parents' reel to reel tape recorder as a kid.

author: just5554
author_rank: Contributor
timestamp: June 20, 2016, 08:30:22 pm
content: Quote from: Gyro on June 20, 2016, 08:11:58 pmHow much current it may draw from 250V?

author: Gyro
author_rank: Super Contributor
timestamp: June 20, 2016, 08:33:30 pm
content: Very little, it will be in the order of 1-2mA.Edit: You can probably read it easier than I can!http://www.thetubestore.com/lib/thetubestore/RU-6E5C.gif

author: just5554
author_rank: Contributor
timestamp: June 20, 2016, 08:35:47 pm
content: Quote from: Gyro on June 20, 2016, 08:33:30 pmwill be enough 10W transformers back to back? they should be exactly the same?

author: just5554
author_rank: Contributor
timestamp: June 20, 2016, 08:40:13 pm
content: Quote from: Gyro on June 20, 2016, 08:33:30 pmhell no, if i could i woudn't ask here XD

author: Gyro
author_rank: Super Contributor
timestamp: June 20, 2016, 08:52:45 pm
content: Yes, 10W transformers will beeasilybig enough. They don't necessarily need to be the same, the second one could be lower wattage if you want. When you rectify the output, the capacitor will charge to peak AC (around 320V for 230V RMS) but as you are using a small value capacitor this will droop a bit under load so should be ok.Please be very careful with your wiring and insulation. Remember that even isolated, the output of the second transformer is still enough to kill you if you touch both leads, just like mains, your transformers are only isolating it from earth. If you are unsure about your capability then don't go ahead. Have a second person in the room so they can kill the power if you get into trouble. Also keep one hand in your pocket when it is powered to prevent a shock between your hands and through your heart.QuoteHaha, ok, fair enough.

author: janoc
author_rank: Super Contributor
timestamp: June 20, 2016, 08:53:26 pm
content: It says anode current is 5.3+-1.9mA@250V, you need -4V on the grid and the filament needs 6.3V/300mA +-25mA. To have the dark sector smaller than 5deg you need -8.25+-2.25V on the grid.

author: Gyro
author_rank: Super Contributor
timestamp: June 20, 2016, 08:59:25 pm
content: Thanks janoc.The input current will be very small as the grid is very sensitive. If you leave out the 0.01uF capacitor between the grid and ground then it might respond very well to noise pickup.

author: just5554
author_rank: Contributor
timestamp: June 20, 2016, 09:02:47 pm
content: Quote from: Gyro on June 20, 2016, 08:59:25 pmI'm starting to worry that this is a bit too hard for me, but i really will make it some day becouse it looks so awesome!

author: Gyro
author_rank: Super Contributor
timestamp: June 20, 2016, 09:07:44 pm
content: The other answer is to pick up a small DC input high voltage inverter from ebay, that will be much safer.(Edit: I see some are from Lithuania).eg:http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR12.TRC2.A0.H0.Xnixie+supply.TRS0&_nkw=nixie+supply&_sacat=0Don't worry too much about the input to the grid, this is the signal input to change the size of the illuminated segment. You will get a glow regardless.

author: just5554
author_rank: Contributor
timestamp: June 20, 2016, 10:30:40 pm
content: Thank you so much, I found one that is even from the same city where I am !