Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: bluesbear on August 13, 2011, 10:33:19 pm

Title: Aluminum metallized polypropylene for filter caps?
Post by: bluesbear on August 13, 2011, 10:33:19 pm

Solen makes aluminum metallized polypropylene fast caps in 630v up to 47mf. Is this cap acceptable for use as a filter cap? It seems to me that, since the voltage is way overrated, it should work, but I'd love some expert advice before going forward.
Thanks,
Dave

Title: Re: Aluminum metallized polypropylene for filter caps?
Post by: TubeGeek on August 13, 2011, 11:19:33 pm

Sure they work just fine but you'll need tons of room for them as they are BIG.

Title: Re: Aluminum metallized polypropylene for filter caps?
Post by: HotBluePlates on August 13, 2011, 11:40:58 pm

They are great, and I've used them. They are WAAYYY wider than Sprague Atoms, so a retrofit will often be difficult. Measure 3 times before you cut, in this case.

Title: Re: Aluminum metallized polypropylene for filter caps?
Post by: bluesbear on August 15, 2011, 02:43:05 am

They are huge! Thanks for the info.
Dave

Title: Re: Aluminum metallized polypropylene for filter caps?
Post by: J Rindt on August 15, 2011, 03:11:27 pm

Steve Carr uses them.
It is almost funny.....the first time you see them in a chassis.
As stated by others, they are much bigger than elytics of the same value.
Best