Valved RIAA Preampfilter
using an ECL86

Continue reading this Elektor article?
- Unlimited access to online Member Only articles
- 3 new editions Elektor Magazine (digital)
- More than 5000 Gerber files
- 20% member discount on e-books (at elektor.com)
- 10% member discount on Products (at elektor.com)
Stops Automatically.
What is Members Only
Elektor is committed to providing high-quality content on electronics, catering to tens of thousands of paying members. As part of this commitment, Elektor has launched Premium, an initiative that offers exclusive online articles to members sometimes even before they appear in the magazine.
Every day, members can access in-depth articles that showcase the best of Elektor's premium content.
This initiative aims to reward members with early access. Once logged in, members can easily enjoy this exclusive content and engage in discussions about featured projects. While Premium adds to the existing resources available, Elektor will continue to provide a wealth of free information.
Join the Elektor community today to take advantage of Premium and other benefits!
Component list
(metal film, 0.7 W, 1% tolerance,
MO = 5%, tolerance)
R1 = see text
R2 = 1M? (see text)
R3 = 47k?
R4 = 220k?, MO, 2W
R5,R6 = 1k?5
R7 = 4k?7
R8 = 680k?
R9 = 220k?, MO, 2 W
R10 = 560?
R11 = 1M?2
R12 = 68k?
R13,R14 = 18k?, MO, 4.5 W
R15 = 270?, MO, 2W
R16 = 8k?2
R17 = 10k?
Capacitors:
C1,C2 = see text
C3 = 47µF 35V bipolar
C4 = 47µF 450 V axial
C5 = 2µF2 400V, lead pitch 5mm
C6 = 47µF 450V axial
C7,C8 = 220µF 25V, lead pitch 5mm
C9 = 47µF 450V axial
C10,C11 = 3nF3, 2.5 % polypropylene, min. 100V
C12 = 1nF5, 2.5 %, polypropylene, min. 100V
C13 = 1nF, 2.5 %, polypropylene, min. 100V
Miscellaneous:
V1 (Rö1) = ECL86
1 noval (9-pin) socket, ceramic, for board mounting
1 PCB, epoxy resin strengthened, 70µm copper layer
1 Moving-Coil transformer, type R-110, see text
Solder pins
Discussion (0 comments)