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Re: Tubes versus Transistors [message #98301 is a reply to message #98300]

Tue, 04 February 2025 19:44

gofar99
Messages: 1969
Registered: May 2010
Location: Southern Arizona

Illuminati (5th Degree)

Hi, The above is why with only one exception I use only polys in my gear and specify them in my projects. Any elecrolytics are only in power supplies and are bypassed with polys. In one of my latest phono preamps I even use polys in the latter stages of the power supply. So I am in agreement with you. Further if there is a way to eliminate a capacitor in a design (like between stages) I do that as well as long as the omission doesn't cause additional issues.

Good Listening
Bruce

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Re: Tubes versus Transistors [message #98320 is a reply to message #98300]

Thu, 13 February 2025 13:48

positron
Messages: 121
Registered: May 2020

Master

Something I should mention is that I try to have at least the "decoupling" capacitor
and previous capacitor as all polypropylene.

Another is that although there are some sonic differences between electrolytic
capacitors, I find a quite wide sonic differences between polypropylene capacitors,
so one needs to be careful to obtain the correct ones.

Sonic differences are caused by:

1. Dielectric materials used
2. Type of conductive "plate" material used
3. Thickness of the "plate" material
4. Termination techniques
5. Type of lead material used
6. Size of lead material used
7. Combination of materials combined, whether "plate", termination, or lead

There may be more upon in depth reflection.

cheers

pos

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