b-2 amp

leapingknome · 15th January 2012, 11:58 AM

hello all- currently playing with a yamaha b-2 power amp. yep...its got blown v-fets. has anyone out there come up with subs or circuit mods to compenstae for the impedance factors of the v-fets?
regards, leapingknome

CBS240 · 15th January 2012, 09:34 PM

Hi

That is unfortunate if they are blown. Those special devices are very difficult to get, and even if you can find someone who has them, they will want an arm and half a leg for them, that is if they know what they are. If I'm not mistaken, those are normally on devices so if you are measuring Rds with them out of the circuit they should show up as nearly a short. You can build a test rig to be sure, Vp should be ~10V.

15th January 2012, 11:58 AM	#1
leapingknome diyAudio Member Join Date: Jan 2012 Location: foothills of the smokies	b-2 amp hello all- currently playing with a yamaha b-2 power amp. yep...its got blown v-fets. has anyone out there come up with subs or circuit mods to compenstae for the impedance factors of the v-fets? regards, leapingknome

15th January 2012, 09:34 PM	#2
CBS240 diyAudio Member Join Date: Aug 2005 Location: K-town	Hi That is unfortunate if they are blown. Those special devices are very difficult to get, and even if you can find someone who has them, they will want an arm and half a leg for them, that is if they know what they are. If I'm not mistaken, those are normally on devices so if you are measuring Rds with them out of the circuit they should show up as nearly a short. You can build a test rig to be sure, Vp should be ~10V. __________________ All the trouble I've ever been in started out as fun......

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