View Single Post
Old 7th Feb 2014, 9:57 am   #1032
crackle
Rest in Peace
 
Join Date: Mar 2011
Location: Basildon, Essex, UK.
Posts: 4,100
Default Re: The "Sussex" Homebrew Valve Tester.

Hi
I have come across an issue with the first stage of the "commissioning tests".
I have built my tester with a patch bay rather than a multi way switch for each pin.
So on my tester when I check resistance between the cathode and all other electrodes there is a permanent 21k connection between the cathode and the screen grid, through R23 R24 & R33. Do you see this in itself being a problem.
I have drawings of my veroboard layouts which I can supply.
I will post some photos of the work so far.
Thanks
Mike

More photos to follow
Attached Thumbnails
Click image for larger version

Name:	SVT_voltage selector switches.jpg
Views:	429
Size:	64.4 KB
ID:	88723   Click image for larger version

Name:	SVT_heat sink.jpg
Views:	425
Size:	59.5 KB
ID:	88724   Click image for larger version

Name:	SVT_bias&HT_board.jpg
Views:	450
Size:	82.6 KB
ID:	88725   Click image for larger version

Name:	SVT_panel drawing.jpg
Views:	582
Size:	81.8 KB
ID:	88726   Click image for larger version

Name:	SVT_panel wiring.jpg
Views:	459
Size:	89.0 KB
ID:	88727  

crackle is offline   Reply With Quote