Radio Road Which tuner to get and getting the most from it. Thank God, for the radio!

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Radio Road ]

---

[ Alert Moderator ]

---

RE: fisher wx multiplex chassis

Posted by BFitz (A) on June 21, 2018 at 07:47:51

In Reply to: RE: fisher wx multiplex chassis posted by thermionic emitter on June 17, 2018 at 13:22:41:

Did you get "real" 1N34A diodes? A lot od sellers are passing fakes on EBay and elsewhere. You can tell from the voltage drop AT low current (1-2 ma). Most multimeter have a test, but all seem to do it at different currents.

You want TRUE germanium diodes, not anything else, and they should be matched for Voltage drop. There is one other new one that is OK, it's an HP mixer diode (NOS), but it may be sold out by now.
We had a good discussion at FMTuners a while ago on this subject,mostly centered on their use in detectors, but there were also used in tube MPX decoders.

Be very careful with a stuck ferrite core, if it is already broken, it's too late. Most stuck cores ARE. If broken you need a new ferrite core, or new transformer from another unit. Some folks have gotten the pieces out and re-glued them, but that never worked for me. It helps to remove the aluminum outer case to diagnose what is going on.

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 ]

---