capacitors

dognut · 25th February 2009, 10:23 PM

Hello to all.recapping my tube reciever. The caps that come off the 7591 tubes are elna 0.3uf @ 400wv. can I put two 0.15ufs together to get the 0.3

ErikdeBest · 25th February 2009, 10:41 PM

Put both 0,15uF in parallel, and yes, you obtain a total of 0,3uF. Of course each of the 0,15uF capacitors should be rated for the same voltage as the 0,3uF unit!

whitelabrat · 26th February 2009, 06:35 PM

You may be able to get away with a single 0.33 instead. Or even a 0.47 or 0.22.

m6tt · 26th February 2009, 07:50 PM

You can reduce the grid leak for the 7591 (assuming the driver can handle it) and use a larger cap and have the same frequency response while putting less strain on the 7591. If they're say 220k, you could make them 120k and use a .47uF. This all really depends on how stressed the driver is already, so if it's a 12ax7 this is probably out.

25th February 2009, 10:23 PM	#1
dognut diyAudio Member Join Date: Oct 2007	capacitors Hello to all.recapping my tube reciever. The caps that come off the 7591 tubes are elna 0.3uf @ 400wv. can I put two 0.15ufs together to get the 0.3

25th February 2009, 10:41 PM	#2
ErikdeBest diyAudio Member Join Date: Mar 2003 Location: Itoculo	Put both 0,15uF in parallel, and yes, you obtain a total of 0,3uF. Of course each of the 0,15uF capacitors should be rated for the same voltage as the 0,3uF unit! __________________ my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY!

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26th February 2009, 06:35 PM	#3
whitelabrat diyAudio Member Join Date: Dec 2006 Location: Maryland	You may be able to get away with a single 0.33 instead. Or even a 0.47 or 0.22.

26th February 2009, 07:50 PM	#4
m6tt diyAudio Member Join Date: Aug 2007	You can reduce the grid leak for the 7591 (assuming the driver can handle it) and use a larger cap and have the same frequency response while putting less strain on the 7591. If they're say 220k, you could make them 120k and use a .47uF. This all really depends on how stressed the driver is already, so if it's a 12ax7 this is probably out.

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