Span classnews_dtjul 09 2010spannbsp018332mg if this is your first time discharging the caps in your amp i would suggest attaching a voltmeter to the pos neg terminals of the cap before you do so that way you can visually see how long it takes for a cap of its size to fully discharge.
The filter capacitors even after the amplifier has been turned off always unplug the amplifier from commercial power and discharge all filter capacitors before working on the amplifier circuitry if you fender blackface amps used dual 25uf capacitors in the preamp section.
Span classnews_dtnov 12 2009spannbsp018332first off sprague does date their filter caps and despite looking all shiney those bright orange filter caps were from 1974 so i tossed in some 47mfd 500v caps in their place the amp makes a little less ac hum but still didnt fix the problem.
Span classnews_dtjan 19 2016spannbsp018332safety is everything heres a method to protect yourself a clip from our video series tube amps 101 available at wwwrecycledsoundnet.
Span classnews_dtoct 10 2015spannbsp018332how to safely discharge your combo tube amp capacitors check the voltage and prep your amp for modding or maintenance.
50 out of 5 stars mallory 150 metalized polyester 047uf capacitors fender tweed amp caps 5pcs.
A hrefvideossearchqdischargefiltercapsfenderampdatingampru2fsearch3fq3ddischarge2520filter2520caps2520fender2520amp2520datingampviewdetailampmmscnvwrcampmid1de0a1b40821bc76e6e61de0a1b40821bc76e6e6ampformwvfstd hidserp54421watch videoanbsp018332how can i test the old filter caps with the chassis intact if i replaced all filter caps for the safety of the amp would it harm the vintage tone id replace it if the caps are old it will change the tone but it will change it back to where fender originally designed it log in to reply if tube amp caps discharge rapidly when.
Span classnews_dtmar 11 2010spannbsp018332servicing a 67 fender twin reverb as my first real project and want to change the original filter caps not sure with what though five old mallorys two.
After a good basic servicing and new filter caps the amp sounded great and was ready for another thirty years of honky tonkin the next silverface twin came in after a.