Higher Voltage Filter Caps ?

[Tony Bones]

Antique Electronic sells generic poly caps up to 20uF. Unfortunately, they're rated for only 400V, but they're way cheaper than Solens. Really not much more expensive than F&T electrolytics.

[pompeiisneaks]

As R.G. was saying, I've often debated something like this:

https://www.mouser.com/ProductDetail/KE ... fR4kzSE%3D

700VDC at 22uf and can basically last forever, instead of like e-lytics that need changing every 10-15 years.

~Phil

[xtian]

At $11 each, smoke 'em if you can afford 'em!

[pompeiisneaks]

At $11 each, smoke 'em if you can afford 'em!

Thus why I've 'debated it'

If you need 5 or 6 in an amp, that gets pricey fast.

~Phil

[TUBEDUDE]

But you only have to do it once.
For repairs, i replace what was installed, unless the owner has a request. For all my builds i use metalized caps for all power supply filters, sometimes paralleled with 'lytics if i need lots of storage, like a 200w bass amp.

[pompeiisneaks]

But you only have to do it once.
For repairs, i replace what was installed, unless the owner has a request. For all my builds i use metalized caps for all power supply filters, sometimes paralleled with 'lytics if i need lots of storage, like a 200w bass amp.

Thus why I've debated it

~Phil

[TUBEDUDE]

Greetings Phil,
Sorry if my comments seemed directed at your actions, i was trying to address the discussion in general, and strongly advocate the use of film caps in new builds, and improving filtering in old ones.

[M Fowler]

I currently use 50uf/600v e-caps in my higher voltage amps such as 50w hot rod plexi, expensive but worth it.

[pompeiisneaks]

Greetings Phil,
Sorry if my comments seemed directed at your actions, i was trying to address the discussion in general, and strongly advocate the use of film caps in new builds, and improving filtering in old ones.

I'm just being silly, thus the smilie. It's got pro's and cons obviously. The cost is a con, the more permanent, it should never fail, is the major pro. You both hit those right on the head.



~Phil

[pompeiisneaks]

I currently use 50uf/600v e-caps in my higher voltage amps such as 50w hot rod plexi, expensive but worth it.

But if you could use this, and pay that price, and never replace them again, wouldn't it be worth it instead of e-lytics?

https://www.mouser.com/ProductDetail/WI ... FyvdLbE%3D

~Phil

[M Fowler]

Yeah it would be better choice of cap and I believe Colossal already built a Marshall amp with those and the only problem was the short leads but with eyelets or designed PCB it that problem would eliminated.

Mark

[pompeiisneaks]

Yeah it would be better choice of cap and I believe Colossal already built a Marshall amp with those and the only problem was the short leads but with eyelets or designed PCB it that problem would eliminated.

Mark

True the short leads do make it problematic, I had to try and solder one of those class X caps across my bias supply on the amp I was working on (then remove later because I had the wrong type of bias lol). They work in eyelets but probably work best if you make the eylets slightly wider than them so that they bend very slighty into the eyelet holes and then create a slight tension across them. These do have 4 leads, 2 per side to give them more current capacity, as well, which means more 'mods' to make them work in existing environments as well.

~Phil

[ZMoney]

https://tubedepot.com/products/solen-fast-cap-47f-630v

These Solens aren’t much more than the WIMAs and they’re axial, which is better for eyelets or turrets.

The cheapest option for over 500v caps is stacking Radial Aluminum Electrolytic. United Chemi-Con 100uf 400v for $1.84. Big discounts for not very high quantities. They’re also rated for 12000 hours!

https://www.mouser.com/ProductDetail/Un ... idiRZdM%3D

[pompeiisneaks]

The later point of the thread was not cheap, but longer lasting. As is the usual, you can choose from cost, speed and quality, and you basically get two of three, not all of them . speed is somewhat irrelevant on this idea, but I think you get the gist. You can pay for a higher cost cap and get better life out of it (in theory) or pay less for one that will have a shorter lifespan. Previous posts already have agreed there are e-lytics that work, but that the newer, more expensive film types are in the right voltage range and although the cost would be more up front, they'd never need replacement. The solen seems to fit that bill as well, I just would never buy from tube depot, but that's just me

~Phil

[TUBEDUDE]

The Solens are my fave. They are available from Angela Instruments, and many others, including Solen's Canadian office.