Hi all...
I am considering replacing a 15 years old power supply in a tube amp with MKP film. The variety of DC LINK caps and the price are compelling.
This amp uses 6 x 4700 @100 for the end result of +-800uf @600vdc for the B+ (480vdc), followed by a choke to the screen supply of 47uf, followed by the preamp (4 x 12ax7) supply at 47uf. The power supply is rectified by 8 IXYS hexfreds feeding the 6 caps as noted.
This one channel of a dual mono amp with six 6L6GC per channel in triode or pentode. Output impedance of the transformer is high for a tube amp but also follows the concept of maximum power transfer to the load. I bring this up as there is a relationship between this and the power supply. Comments are welcome.
Size makes the difference here, and will require an outboard box, or a second box under the amp to house the MKP caps. Price: well very good grade electrolytics x 6, is about the same as a CDE [email protected] or WIMA [email protected], about $100/$125 per channel.
The specs on these caps is very impressive. If I am going to go down this road,i have a choice of a large cap as mentioned above, or upwards of 10 smaller uf caps in parallel to reach the 800uf value. Opinions on one large vs many smaller to achieve 800uf is welcome.
Has anyone substituted this type of cap for electrolytics as the primary cap for a power supply in a tube amp, and felt it was worth it?
I am considering replacing a 15 years old power supply in a tube amp with MKP film. The variety of DC LINK caps and the price are compelling.
This amp uses 6 x 4700 @100 for the end result of +-800uf @600vdc for the B+ (480vdc), followed by a choke to the screen supply of 47uf, followed by the preamp (4 x 12ax7) supply at 47uf. The power supply is rectified by 8 IXYS hexfreds feeding the 6 caps as noted.
This one channel of a dual mono amp with six 6L6GC per channel in triode or pentode. Output impedance of the transformer is high for a tube amp but also follows the concept of maximum power transfer to the load. I bring this up as there is a relationship between this and the power supply. Comments are welcome.
Size makes the difference here, and will require an outboard box, or a second box under the amp to house the MKP caps. Price: well very good grade electrolytics x 6, is about the same as a CDE [email protected] or WIMA [email protected], about $100/$125 per channel.
The specs on these caps is very impressive. If I am going to go down this road,i have a choice of a large cap as mentioned above, or upwards of 10 smaller uf caps in parallel to reach the 800uf value. Opinions on one large vs many smaller to achieve 800uf is welcome.
Has anyone substituted this type of cap for electrolytics as the primary cap for a power supply in a tube amp, and felt it was worth it?