MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ MagneQuest/Peerless Forum ]

---

[ Alert Moderator ]

---

RE: Last call: FS-100 plate chokes

Posted by Paul Joppa (P) on February 6, 2009 at 18:41:15

In Reply to: Last call: FS-100 plate chokes posted by mqracing on February 6, 2009 at 08:18:55:

Just a thought for anyone interested ...

In my experience, a larger impedance plate load always makes for better sound in parafeed. I've tried, or at least listened to, a wide variety of chokes as well as current sources. I once built a preamp with switched plate loads of 20, 24, 40, or 48 henries, for example (using 6BL7s parafeed to B7-5K) plus a current source - believe me, every inductance increase was an improvement.

Extrapolating that experience, here's a really wild idea - get a pair of these gapped for 60mA and couple to a TFA-2004Ni with a 27uF capacitor. If you can afford the nickel core TFA (still the best sounding OPT I've ever heard), this choke is neither inappropriate nor unreasonably expensive. Feed it with a 2A3 running 275v at 55mA - cathode resistor 910 ohms - or if you're feeling flush, one of those 2.5v 300Bs at 300v, 60mA (same cathode resistor).

Of course the greatest benefit will be in the bass, so use this to drive some ginormous efficient speakers with killer bass.

I predict you will never hear sound as good with a 2A3.

This post is made possible by the generous support of people like you and our sponsors:

VH Audio

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---