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Amplified Blues Harmonica BBS
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Vintage 1960's Shure Brothers PE-53 harp microphone High Z old used midcentury

Vintage Silvertone Harp Harmonica Mic

1951 Shure Black Controlled Reluctance Element for Harp Vocal Mic Hi-Z 99H86

Switchcraft 332A 5/8-1/4 Microphone Adapter for Vintage Harmonica Harp Mic JT-30

Vintage 99?86 Shure Mic Element Harp Harmonica Very Low-Z ~1 ohm

4 NEW Shure Harmonica Soft Zipper Leatherette bags, SM57, SM58, Bullet Mic!

CX-520 Professional Harmonica Microphone (Connector 4P Mini XLR)

CX-520D Professional Harmonica Microphone (1/4” plug)

Vintage 1960's 533 SA Shure Brothers harp microphone used w Shure S38B stand

VINTAGE 1959 SHURE MICROPHONE CONTROLLED MAGNETIC 99B86 HARP MIC 1055 Ω LQQK

Hohner HooDoo Wireless Harmonica Microphone

VINTAGE 1959 SHURE MICROPHONE CONTROLLED MAGNETIC 99G86 HARP MIC 1085 Ω LQQK

VINTAGE 1953 SHURE MICROPHONE CONTROLLED RELUCTANCE HARP MIC 99H86 1150 Ω LQQK

Threaded Bushing for JT30 Harp Mics 5/8-27 Thread Fits Mic Stand Socket

Custom Astatic 200S Harp Harmonica Microphone w/Hot Philips Dynamic Element L@@K

Vintage NOS 1950's Astatic 331 Ceramic Harp Microphone & Holder & Manuals & Box

Custom Shure 562 Hi-Z Harp Harmonica Microphone w/ Volume Control 1/4" jack L@@K

Vintage Harmonica, Harp, PA, Ham Radio Microphone MIC

Tin Can HI-Z Ceramic Harmonica Microphone W/ Vol Knob Cigar Box Guitar Harp Mic

Custom Hi-Z Wood Tweed Orange Bullet Style Ceramic Harp Mic Harmonica Microphone

Ceramic Microphone Resonator Guitar Banjo Stompbox Cigar Box Can Harp Mic Pup

Vintage 1960s Shure Brothers 540 harp microphone old used midcentury w cable

Custom HiZ Wooden Retro Bullet Blues Style Ceramic Harp Mic Harmonica Microphone

Custom Hi-Z Wooden Tweed Blue Bullet Style Ceramic Harp Mic Harmonica Microphone

Custom Hi-Z Wood Tweed Purple Bullet Style Ceramic Harp Mic Harmonica Microphone

Hi-Z Wooden Bullet Silver Hammered Finish Ceramic Harp Mic Harmonica Microphone

Tin Can Harmonica HI-Z Ceramic Element Microphone Harp Mic Cigar Box Guitar

Custom Wooden Retro Bullet Blues Style Magnetic Harp Mic / Harmonica Microphone

Tin Can HI-Z Ceramic Harmonica Microphone with Volume Control / Cigar Box Guitar

Custom Hi-Z Wooden Tweed Lime Green Bullet Ceramic Harp Mic Harmonica Microphone

Custom Hi-Z Wooden Tweed Dark Green Bullet Ceramic Harp Mic Harmonica Microphone

Ceramic Microphone Element Fits JT30 Shell Capsule Cartridge Harmonica Harp Mic

Commando Soda Pop Bottle Hi-Z Ceramic Element Harmonica Microphone Harp Mic

Black Shure 520D Bullet Harmonica, Harp Mic, 1955 Controlled-Reluctance Element

10' Microphone Cable Straight Astatic Turner JT 30 Shure EV Vintage Harp MC-10

Vintage Astatic T3 Bullet Harmonica Microphone Harp Mic

Vintage BeyerDynamics M640N Dynamic Microphone Mic Harp Guitar Used w Stand

Vintage Shure 99A86 Controlled Magnetic High Impedance Mic Element Harmonica

Vintage Shure PE53 dynamic Spher-O-Dyne Hi-Z microphone harp mic

Audix Fireball Dynamic Cardioid Live Vocal Harmonica Beatbox Drum Microphone

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Date: Wed, 12 Feb 2003 03:12:10 EST
From: Markburne~ol.com
Subject: Re: amp vibrato (was: Little Walter was Re: throat vibrato)

The Vibroverb,Tremoluxes & Princetons of that era (6G?) used the bias
modulation to achieve vibrato/tremolo/wobble but this method only requires 1
preamp tube. The 6G12 & 6G12A Concerts (as well as the
Pro/Bandmaster/Twin/Super of the same age) use 2-3 12AX7 tubes to split the
signal into highs and lows and and get them beating against each other.

The blackface AB763 Concert used the light dependent resistor found in most
other BF & SF amps.

Regards, Mark.