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Use SDS Labs PASCapboard w/ VTA's PAS3-Z upgrade Kit



Posts: 11
Join date: 2010-08-09
Age: 66
Location: Flossmoor, Illinois USA

Use SDS Labs PASCapboard w/ VTA's PAS3-Z upgrade Kit

Post by pwsnyder on Tue Sep 07, 2010 11:32 pm

I've purchased Roy Mottram's (VTA's) PAS3-Z kit for use with my Dyna Pas3 chassis and PS211 transformer. I want to use the SDS PasCapboard II supply board/kit (filament rectifiers on-board, larger diameter caps. possible and easy switch from solid state to tube rectifier input) to work with VTA's circuit. However, I lack the engineering background to calculate resistor values/wattages to deliver the required 320 volts to the PC-5Z and PC-6Z boards. The SDS board kit arrived with resistor values for the different B+ voltages required by the original PAS3 boards. Can anyone help me? (I would have provided/attached the schematics for the SDS and VTA boards - but I haven't figure out a way to do that.) Thanks everyone.



Posts: 995
Join date: 2008-11-30

Re: Use SDS Labs PASCapboard w/ VTA's PAS3-Z upgrade Kit

Post by tubes4hifi on Tue Sep 14, 2010 12:43 am

why would you want to add the SDS power supply when the PAS3-Z kit already comes with a power supply? The boards are nearly similar . . .
Doing the calcs is easy, send me an email so I can try to figure out why you need two similar power supplys
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