Hi Stephen,
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Sorry to hear the list of rectifiers is not coming up. Do you get a message at startup "Unable to load default PSU"? Also, I've included details of the end to end process below:
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TO CHANGE TO VACUUM TUBE / VALVE RECTIFIER
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Hover the mouse cursor over the PSU so the transformer and rectifier all light up yellow by positioning on the word "Bridge (SS)". Right click and select Change. Click on Full Wave and then OK.
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TO CHANGE RECTIFIER TYPE
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If you hover over the rectifier(s) there will be a yellow block surrounding them. Once they are "in scope", you can right click on the rectifiers and select Edit. This should bring up a rectifier selection window:
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From here you should be able to pick GZ34 or 5AR4 (they are identical models). The rest should be as the instructions in the help file on Modelling Your First Power Supply.
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Hope this helps but come back to me if this isn't working for you.
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Regards,
Duncan
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