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RCA 5692 6SN7 RED BASE HIREL MATCHED QUAD full NOS VERY RARE SET ATTN VAC    US $499.99

MIC MICHROPHONE STEPUP 50 50000 OHMS PREAMP TRANSFOEMER    US $39.99

ELECTRONICS COMPONENTS IC TRANSISTOR 3 4 8 PIN SPACERS TEST EQUIPMENT AMP PREAMP    US $22.99

20M Silver Plated Copper Wire 300B EL34 211 6DJ8 12ax7    US $45.00

Harmon Kardon Vacuum Tube Integrated Amplifier Receiver for rebuild or parts    US $99.00

RCA 6V6 TUBE INTEGRATED AMPLIFIER CONSOLE MODEL SHC 6 VINTAGE 1960s USA    US $49.99

Harman Kardon FA 3000x Integrated Amplifier Rare    US $139.99

Eico HF 85 Tube Preamp Original Nice    US $600.00

RARE VINTAGE BELL RT 65 REEL TO REEL TUBE TAPE RECORDER AMP PREAMP    US $150.00

Mullard EL34 black base matched quad maxi matcher tested    US $150.00

Genalex GOLD LION ECC83 B759 12AX7 Matched Sections    US $52.00

PP Capacitor 20uf 800V PIO Oil Cap 300B EL156 KT88 6L6    US $15.00

AMPEREX 7025 PREAMP TUBE BUGLE BOY HOLLAND 12AX7 ECC83 SUB AMPLIFIER AUDIOPHILE    US $5.24

AMPEREX PREAMP 12AX7 ECC83 TUBE STEREO AUDIOPHILE AMPLIFIER HOLLAND GLOBE RARE    US $1.04

Vintage RCA 7199 1970s preamp tube tested Sunn Ampex short plate    US $.09

Vintage GE General Electric 7199 USA preamp tube tested Sunn Ampex Fisher    US $.09

Stereo MC Moving Coil Step Up Transformer SUT Phono Preamp USAF Military Iron    US $375.00

MAGNAVOX STEREO TUBE AMPLIFIER EL84 AMPLIFIER by DENNIS HAD TUBE HEADPHONE AMP    US $425.00

MELZ 6H8C 6SN7GT 6SN7 MATCHED PAIR NOS METAL BASE OTK    US $109.90

Genalex Gold Lion 6922 Gold Pin tube $3800 ea E88CC    US $38.00

NOS NIB Telefunken ECC83 12AX7 Dynaco Fisher Marantz Vintage Amp    US $99.99

Cherry Red Stereo Tube Amp Amplifier Bob Carver Vintage    US $1,103.00

NOS JAN Philips 6L6WGB matched quad Maxi Matcher tested    US $199.00

FISHER X 100C GE 7868 AUDIO OUTPUT 12AX7 TUBE SCOTT STEREO PREAMP AMPLIFIER AMP    US $222.50

Remote Control Volume for DIY tube Preamp Amplifer 100K    US $53.95

22 uF 400 VOLT TUBE AMP PREAMP MYLAR AUDIO MIXER CAPS    US $9.99

6BQ5 EL84 AF Power Pentode 5    US $15.00

Cetron JAN 5R4 WGB Full Wave Rectifier Tube    US $15.00

AC LINE POWER JACK CHASSIS MOUNT INTERLOCK 120 VOLT CONNECTOR F13    US $19.99

NOS JAN Philips ECG6L6GC matched pair tested    US $149.00

470 uF 35 VOLT TUBE AMPLIFIER PREAMP POWER SUPPLY FILTER CAPACITOR CAPS    US $19.99

560 uF 200 VOLT TUBE AMPLIFIER PREAMP POWER SUPPLY FILTER CAPACITOR CAPS    US $22.99

LINE VOLTAGE VARIAC 4 AUDIO RESEARCH D150 SP3 TUBE AUDIO POWER AMPLIFIER PREAMP    US $289.00

TRIMPOTS 50K TUBE AMP PREAMP MIXER MINI TRIMMER POT P23    US $19.99

NOS Sylvania 6L6GC matched quad tested    US $199.00

80 uH AUDIO VIDEO LINEAR AMPLIFIER PREAMP RF COIL PEAK INDUCTORS T9    US $19.99

06 UH RF VIDEO LINEAR AMPLIFIER PREAMP COIL CHOKE PEAK INDUCTORS T7    US $19.99

McIntosh pamphlet C22 275 Tube Preamp Amplifier    US $50.00

McIntosh 275 Tube Amplifier    US $6,150.00

400 VOLT 3A TUBE PRE AMP RECEIVER DIODE RECTIFIER BRIDGE S    US $27.99

6EJ7 Tube GE Japan NOS Pentode Amplifier Pre Amp    US $3.95

CBS JAN CHY 5Y3 WGTA Full Wave Rectifier Tube    US $20.00

JAN 5931 5U4 Full Wave Rectifier Tube    US $20.00

Vintage GATES Cue Amp Mic preamp Yard TUBE RECORDING Radio CONSOLE Audio Mixer    US $99.99

Wurlitzer transformer set for DIY tube amplifier Fender Gibson amp restoration    US $50.00

Genalex GOLD LION Gold Pin 6922 E88CC 6DJ8    US $50.00

EF184 6EJ7 Tube United Siemens Germany NOS Pentode Amp Mesh Plate    US $5.95

6 ch Remote Control Volume for DIY tube Preamp 100K    US $65.00

5 Vintage GE General Electric 6AU6 Preamp Tubes STRONG    US $31.00

7 Vintage GE General Electric 6AU6 Preamp Tubes STRONG    US $36.00

6201 12AT7 RARE US Made Audio Preamp Tube    US $12.95

United Electron 6BQ5 EL84 AF Power Pentode    US $15.00

NOS GE 12X4 Tube Dynaco PAS    US $13.95

MBPA 1 Tube Push Pull Power Amp Kit complete 8 Watt International Hi Fi $11995    US $119.95

6J1 6P1 6AQ5 Single Ended Class A Tube Headphone AMP Amplifier Preamp110V 220V    US $97.00

Genalex Gold Lion 12AT7 Gold Pin tube $3300 ea ECC81    US $33.00

RCA MI 10253 LINE TRANSFORMER TUBE AMPLIFIER TUBE PREAMP RARE    US $49.99

Stereo Volume Control Potentiometer Switch Loudness Tap    US $75.00

Hi END 12AT7 ECC81 Tube Preamp Kit Ref JADS110V220V    US $102.00

Hobgob Stereo Vacuum Tube Amplifier Kit    US $455.00

Buffer 6N36Z1 6Z4 Tube Preamp AMP Amplifier board Transformer Chassis    US $178.88

Sylvania 6095 6AQ5 Beam Power Tube Quad Match Four 4 tubes    US $25.00

6201 12AT7 RARE GE US Made Triple Mica 5 STAR Audio Preamp Tube    US $19.95

5670 6N3 SRPP Tube Pre Amplifier Kit W Transformer    US $59.00

GE 12BH7A Long Plts Horseshoe Gttr PreAmp or Power Tube for Blackstar HT5 Guitar    US $8.95

VINTAGE KODAK 16mm Projector 6V6 Tube amp Amplifier Preamp Vacuum Valve    US $65.00

NOS Westinghouse 12X4 Tube Dynaco PAS    US $13.95

MACO KW Amp Primo Tube Set 6LB6 12    US $341.97

MACO Almost KW Amp Primo Tube Set 6LB6 10    US $287.97

MACO 300M Amp Primo Tube Set 6LB6 3 Mod kit for 8950    US $125.97

MACO 200B Amp Primo Tube Set 6LB6 4    US $116.97

Genalex GOLD LION Gold Pin ECC83 B759 12AX7    US $47.00

Genalex GOLD LION Gold Pin 6922 E88CC Matched Sections    US $55.00

RAYTHEON CK 5744 Subminiature High Mu Triode Audio Tube    US $12.95

Valvo E80L 6227 Output Pentode Gold Pin    US $15.00

Buffer 6N36Z1 6Z4 Tube Preamp AMP Amplifier Assembled Great Sound Quality NEW    US $58.88

Melos SHA 1 Tubed Headphone Amplifier    US $500.00

RCA 5692 6SN7 RED BASE FULL MIL JAN CRC MATCHED QUAD full NOS VERY RARE SET    US $599.99

Sony Tapecorder TC 530 Reel to Reel excellent condition less than 1 hr of use    US $229.99

VARIAC 4 VINTAGE MARANTZ MODEL 9 MCINTOSH MC275 C22 AUDIO POWER AMPLIFIER PREAMP    US $289.00

TELEFUNKEN ECC83 12AX7 NEVERUSED MATCHED PAIR    US $249.99

Genalex GOLD LION ECC82 B749 12AU7 Matched Sections    US $52.00

Audio Nirvana 6V6 Ultralinear Vacuum Tube Amplifier BLK    US $995.00

Audio Nirvana 6V6 Ultralinear Vacuum Tube Amplifier SS    US $1,095.00

VINTAGE TUBE AMP AMPLIFIER AND PREAMPLIFIER PRE AMP    US $349.95

USA MADE STACO 1400W TRIPLE METERED BENCH VARIAC FOR TUBE AUDIO AMPLIFIER PREAMP    US $589.00

NOS JAN Philips 6V6GT maxi matched quad    US $109.00

SIEMENS ECC801S 12AT7 SUPERTUBES MATCHED TRIO full NOS quality BEAUTIFUL    US $299.99

MULLARD ECC81 12AT7 MATCHED SIDES RARE BEST SOUND    US $75.00

Genalex GOLD LION Gold Pin ECC82 B749 12AU7    US $47.00

STEREO 6L6 Tube Power Amplifier amp    US $375.00

Dynaco Mullard EL34 matched pair brown base maximatcher tested    US $150.00

Ruby 6550 matched quad made in China maximatcher tested    US $120.00

What could be causing the reverb on my amplifier to not work?

I've got a Marshall VS-102R amp on which the reverb has recently stopped working. My first thought is that the 12ax7 preamp tube may be shot but I wanted some other opinions. Anyone have any ideas?

The tube in that amp is very early in the signal chain. If that were the problem, then you would have problems with the basic sound of the amp.

Do you have a problem with both the clean and OD reverb? If so, there's a problem in the send portion of the circuit. If only one is working, then it's on the return side.

Either way, you're looking at a trip to the repair shop.

Greetings from Austin, Tx

Ken

ART Tube MP Studio Mic Preamp List Price: $86.00 Sale Price: $29.99 You save: $56.01 (65%)   Eligible for free shipping! Availability: Usually ships in 1-2 business days

ART Tube MP Studio V3 Microphone Preamp and Limiter with Presets List Price: $119.00 Sale Price: $69.95 You save: $49.05 (41%)   Eligible for free shipping! Availability: Usually ships in 24 hours