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MrBungle · 9th May 2017, 7:34 pm

A minor, or perhaps major update for this.

Version 2 is in progress. I decided that FETs are monumentally boring so I've found a nice big old Sifam 100uA movement, ordered a pile of stuff from RS including an 12AU7 as the centre-piece of the new version, some high voltage capacitors and a couple of transformers to run back to back for a 115v HT winding. Oh and some chicken head knobs, some sheet aluminium, aluminium primer and black hammer finish paint

First valve project I intend to complete this one, before I try out something a little more complicated with a CRT. Scribblings so far:

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I bought 12VA transformers instead for ref.

9th May 2017, 7:34 pm	#10
MrBungle Dekatron Join Date: Jun 2016 Location: London, UK. Posts: 3,687	Re: Another FET voltmeter A minor, or perhaps major update for this. Version 2 is in progress. I decided that FETs are monumentally boring so I've found a nice big old Sifam 100uA movement, ordered a pile of stuff from RS including an 12AU7 as the centre-piece of the new version, some high voltage capacitors and a couple of transformers to run back to back for a 115v HT winding. Oh and some chicken head knobs, some sheet aluminium, aluminium primer and black hammer finish paint First valve project I intend to complete this one, before I try out something a little more complicated with a CRT. Scribblings so far: I bought 12VA transformers instead for ref. Last edited by MrBungle; 9th May 2017 at 7:42 pm.