Thank you for clarifying.
How do you check which lead is + and which is -? Are they clearly indicated on the new caps, where do you look for?
Some are flagged DC and some sre flagged VDC. They are both the same aren't they? Direct Current or Volt Direct Current.
I notice the estimated life time such as 5000 hrs for instance, roughly 1/2 a year. That's not long! But they do last longer don't they?
When replacing the toasted R47 (with 2.2K 2W), pls tell me I don't need to worry which end is + and which is -
**And would you know why I don'have any emojis here?
Thank you!
There's some stuff I need to explain.
1. The + is marked on the board, and on the schematic.
The cap old or new has (-) marked on it. Yes they are clearly marked, so you won't mix it up.
2. DC and VDC are the same thing.
3. 4000 hours cap: is 4000 hours when used at the full rated temperature (85C), when used at a lower temperature, the life span increases.
That's 4000 hours of "powered on at 85C temperature." The hours don't count when it's powered off.
The voltage 50 volts: when used at a lower voltage, the life span increases.
All considered: In the average guitar amp, the life will probably be 10 years or possibly longer..
The original caps that came with this amp were 2000 hour. The replacements are rated 2X longer life than the originals.
The F&T caps are rated 5000 hour at 85C.
Sometimes we do order 10,000 hour caps. Only when these are available. And they cost more.
Sometimes we do order 105C temperature caps. Same deal, they cost a lot more.
We put these type caps in amps, where cost is no object. For full time professionals who use the amp 8 hours or more every day........and the caps are supposed to last almost forever.
And so: you can order 10,000 hour if you want, you can order 105C if you want. But it will cost more.
And you will find: that high rated caps are not always available. It takes some searching.
You may wind up ordering from multiple sources, and pay multiple shipping charges.
You can go, where cost is no object....if you are so inclined.
millionaires, movie stars, international Rock Stars, who don't care right here in TTR forum. They play Dumble amplifiers in the garage.
4. Resistors have no polarity. Doesn't matter which way you install them.
5. Emojis: Look at the top of the space that you are typing in right now.
See the three dots? ("more options") click on the 3 dots.
Now click on the smile face.
ah! finally found the emojis too! Thank you!! 