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Title: Confused about Neovibe Lamp bulb
Post by: EdJ on January 27, 2004, 07:08:40 AM

Hi,in building the Univibe Clone i am using both J.C. and R.G`s layouts and descriptions .
Most of it is perfectly clear but according to J.C. the lightbulb must be 1.5W 25Ma.In R.G.`s partlist however it is stated as 12V 25Ma.
Which is the one to use?Or can both do it?
Also for the transformer;Conrad Electronic is selling nice small ones that will fit into an enclosure.
Unfortunately i am in the dark as far as the Ma of the unit are concerned.
Can someone help me out,please?
Thanks in advance,Ed

Title: Confused about Neovibe Lamp bulb
Post by: Paul Perry (Frostwave) on January 27, 2004, 07:54:32 AM

12 volts and 25 ma is 0.6 watt, so there isn't a great difference.But, 1.5 W and 25 ma gives 60V!!!! which can't be right, so far a I can see.
As a trap for young players, the resistance of a bulb changes by quite a lot when it glows (? factor of 4 or something?) so, using a multimeter can be misleading.

Title: Confused about Neovibe Lamp bulb
Post by: RDV on January 27, 2004, 09:02:19 AM

I would suggest reading this as it has all the info you could be looking for.http://www.geofex.com/Article_Folders/univibe/uvfrindx.htm

Regards

RDV

Title: Confused about Neovibe Lamp bulb
Post by: EdJ on January 27, 2004, 01:27:47 PM

Ah thank you both very much!
I completely forgot about that article :oops:
I must have it in my drawer somewhere.
reetings,Ed

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DIY Stompboxes => Building your own stompbox => Topic started by: EdJ on January 27, 2004, 07:08:40 AM