Please also see the schematics pages and photographs, which are broadly alphabetic.

A

AKG BX20, C28 & C422 documents

AKG Schematics

Altec 438a Compressor manual

B

BBC transformer data

Blog

C

Calculators for audio & acoustics (links)

D

DIY condenser microphone articles

Documents, Brochures and other articles

EF

Framus Television guitar

G

Gardners transformer data sheet

Gefell CMV563 brochure

Gefell schematics (see also Neumann schematics)

Gretsch Atkins Super Axe

Gyraf G7 observations

HIJ

Josephson C720 opinion

K

Klein + Hummel UE100

L

Links to microphone manufacturer’s websites

Lomo 19a9 manual

M

Maplin mic preamp

Museums of microphones - links to other sites.

N

Neumann microphones being made.

Neumann schematics

O

Oktava schematics

P

PHOTO GALLERIES

QR

Rant about vintage vandals

RFT & Reissmann schematics

Ribbon microphone patents

S

SCHEMATICS PAGES

Schoeps & Sony Schematics

T

Teladi & Thiele schematics

Telefunken ELA M251 documents

Thiele M4 brochure

Tube data sheets for microphones

Tube amplifier design calculators

UVW

Whiteface Omnipressor Manual

X

XAUDIA

YZ

Zobel Network