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Audio and Video Talk
The Vintage Audio Section
AVO Mk 4 calibratrion
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<blockquote data-quote="darrylo" data-source="post: 279300" data-attributes="member: 666"><p>So I finally had some free time since I'm on leave to carry on with this.</p><p></p><p>I found a shop that sell all sorts of little rare earth magnets. Thy fun to play with but don't let the kids(or irresponsible adults) near them. They destroy cellphones, erase bank card strips and can take out a finger if they big enough. (yes I got 2 big ones in the lot ><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" />)</p><p></p><p>So I opened up the meter, Rigged a 30uA supply and slowly brought a 6x6x1mm magnet closer. the scale went down so I turned it around. </p><p>My 1st guess was spot on and after the magnet was attached I adjusted the shunt to read 100% as er factory standard :clap:</p><p></p><p>After this I managed to adjust the mains and Vg voltage to 100% is spec :Whoohoo:</p><p></p><p>Now I have to do the next 20 pages of the manuals calibration instructions...... :nutter:</p></blockquote><p></p>
[QUOTE="darrylo, post: 279300, member: 666"] So I finally had some free time since I'm on leave to carry on with this. I found a shop that sell all sorts of little rare earth magnets. Thy fun to play with but don't let the kids(or irresponsible adults) near them. They destroy cellphones, erase bank card strips and can take out a finger if they big enough. (yes I got 2 big ones in the lot >:D) So I opened up the meter, Rigged a 30uA supply and slowly brought a 6x6x1mm magnet closer. the scale went down so I turned it around. My 1st guess was spot on and after the magnet was attached I adjusted the shunt to read 100% as er factory standard :clap: After this I managed to adjust the mains and Vg voltage to 100% is spec :Whoohoo: Now I have to do the next 20 pages of the manuals calibration instructions...... :nutter: [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
AVO Mk 4 calibratrion
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