The Amp Garage

Finished this amp almost a year ago. But it kept nagging me that it was incredibly hissy. So I tried a lot of things to improve it. But nothing seemed to help. Eventually I have started removing parts of the amp to see the effects. And as I already concluded earlier, it had entirely nothing to do wi...

The general idea of isolating changes and making only one change at a time is a good one. The problem is how do you measure change? Yes, good argument. In the graphics world you can choose to go back and forth between two layers in software like photoshop and compare the edits/changes really fast. ...

Well, that just happened… sometimes I feel like a muggle from that famous story.

pdf64 wrote: ↑Sat Jan 22, 2022 5:36 pm I think Zollman may have looked into this, he has with most stuff from strings to speakers.

Oke, time for an educational moment. Who is Zollman? @pdf64

@kuDo That makes sense. I'm a technician, not an artist, but I do appreciate art when I see/hear it. Go for what makes your aesthetic sense happy. Here's some techie info that might help. I went to wikipedia for the temperature coefficient of PP and other film caps, and found this: https://en.wikip...

Arghh something went pear shaped…. I edited this post. This reply can be removed

I suppose that as temperature stability is the actual motivation for seeking film foil caps here, kuDo could try searching for axiel caps (which may be a metallised type) that have a very low temperature coefficient, rather than a generic search for film foil per se (which probably have a low tempe...

I do understand the concept of interior-wiring-as-sculpture, where the appearance is the thing. And I do appreciate tidy wiring. But to me, these are a means to an end, the sound that comes out. My preferences don't extend to the look of components, given that they are the right values and mounted ...

I gave up looking decades ago and settled on Sprague 716P foil/pp caps. For all power supply, and cathode capacitor needs I use Metalized foil. The needle nose as bending guide and spaghetti tubing/heat shrink covered leads are fine. Ĺarger sizes will need stabilizing. I have been using the 715P en...

Metallized PP has certain qualities that are preferred in some situations, among them, self-healing properties. Regarding damaging radial caps like orange drops by bending the leads, if you use a bending jig, or small pliers as I do, at the base of the cap and then bend the lead, there should be no...

pdf64 wrote: ↑Fri Jan 21, 2022 8:15 pm LCR make excellent caps http://lcrcapacitors.co.uk/wp-content/uploads/fpc.pdf

Thank you sir,

That is indeed a nice contender. Very temperature stable so it seems.

For the higher values I mentioned above size will become a factor.

Here's one: https://content.kemet.com/datasheets/KEM_F3039_A72_AXIAL.pdf Hi Martin, Great find! What if you would commit to this kind of capacitor throughout your build? What if you need a 1uF or 10uF for a kathode bypass? The range doesn’t support them. I also noticed that the caps change to metal...

sluckey wrote: ↑Fri Jan 21, 2022 4:30 pm AES has several brands to choose from. Here are some yellow ones...

https://www.tubesandmore.com/products/c ... xial-leads

Hello Sluckey,

I have seen those, but they are of the metallized film variety, not film foil.

It seems impossible.

Here's a thought experiment. The objection to radial polypropylene film-and-foil caps seems to be that the leads are short and not going in the right directions. What would happen if you formed a tiny loop in a length of wire, and soldered that over the short lead stubs of a radial PP F&F cap? Sure...

Hello everyone, Where can get axial leaded Polypropylene film foil capacitors (not metalized ones)? As far I can see, they seem to be really scarce. I can only find the Nichicon PWS range. Can someone show me where to find some? I am currently reading on the website aikenamps.com made by mr Randall ...