swr basic black schematic

[black_labb]

does anyone have an swr basic black schematic? edit: a layout would be handy too.

fixing one with a hum problem which i am assuming is from the filter caps going, but i'd like to isolate the issue before bunging in some caps blindly.

[Enzo]

If your hum is twice the mains frequency, then it is power supply ripple, but if the hum is same as mains freq, then it is not the filter caps.

Try a different tube in the preamp.

The power amp is generic SWR, the power supply is common.

[black_labb]

thanks enzo. the guy i'm fixing it for says he tried changing the tube, but i'll try that again for a quick fix.

[darrellcheng]

For the internet's records, here is the schematic for the SWR Basic Black direct from Fender. I emailed them and they sent it to meBasic Black.pdfBias Procedure.pdf

[Jazz P Bass]

The 'Bias Procedure' pdf file is not coming up.

Can you 'zip' the file & repost it?

[darrellcheng]

documents-export-2015-01-21.zip

see if that works

[Jazz P Bass]

That worked like a charm.