Tube Preamp
Tube Preamp
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 Trace Elliot Bass Tube Preamp with manual  US $319.99
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 Vintage RCA 12AT7 Rare Black Plate Preamp Tube US $9.38
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 Vintage GE 12AX7 D Getter Preamp Tube Test Matched US $17.40
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 Vintage RCA 12AX7 Tall Black Plate Preamp Tube US $21.80
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 Samson C Valve Tube Microphone Preamp US $49.99
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 Groove Tube 12AT7 12AX7 preamp tubes Brand new US $40.00
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 Presonus Blue Tube Mic Preamp w Adapter Bluetube US $52.99
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 Digitech BP8 Bass Preamp Multi Effects Tube powered US $99.00
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 EARLY MARANTZ 7 C TUBE PREAMP SERIAL 11246 US $6,595.00
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 Precision Electronics Tube Preamp Amp Guitar Mic Pre EQ US $225.00
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 Ampeg SVP Pro Tube Bass Preamp SVP Pro Pre Rack SKB cse US $209.50
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 DuKANE TUBE MIC PREAMP MIXER GTR RECORDING PA AMP MOD US $360.00
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 BBE BMAX T Tube Bass Preamp With Sonic Maximizer US $299.00
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 ENGL 620 TUBE PREAMP US $239.50
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 Vacuum Tube Circuit Design Guitar Amplifier Preamps US $20.00
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 DRAWMER 1960 2 CHANNEL STEREO TUBE PREAMP COMPRESSOR US $989.99
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 Quad of Vintage GE 6211 Clear Top Matched Preamp Tubes US $4.25
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 Quad of GE 12AU7A Close Matched Preamp Tubes US $6.50
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 PreSonus Tube Pre Pre amp Pawn1st 4 17251 US $26.99
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 DBX 576 Tube Pre amp Compressor Excellent Condition US $575.00
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 FIVE NOS VINTAGE RCA 12AU7 ECC82 PRE AMP TUBE US $53.50
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 FIVE NOS VINTAGE GE 12AT7 ECC81 PRE AMP TUBE US $53.50
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 PreSonus Bluetube instrument and mic tube pre amp US $155.00
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 SIX NOS VINTAGE SYLVANIA GE ECC88 6DJ8 PRE AMP TUBE US $53.00
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 229x25 Aluminum Preamp CD Tube AMP Metal Pointer KNOB US $14.99
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 TEN NOS RCA GE CLEAR TOP 6CG7 6FQ7 PRE AMP TUBE US $99.00
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 4x RCA 6AK5 Tubes NOS Little Dot Preamp US $5.51
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 Pair Mullard 12AU7 ECC82 preamp tubes US $28.22
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 ART MP Studio Tube Pre amp US $20.00
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 ADA MP 1 Midi Guitar Preamp with extra JJ 12AX7 Tubes US $192.50
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Who knows about Marshall tube amps?
have a JCM 900 50w 4502 combo 2x12 and the front input jack is out. Very little signal coming through. The FX loop input in the rear of the head CRANKS though. All the tubes are lit up orange, preamp tubes included. HLP PLZ?
Cables are A-OK and my SG has a dirty vol. pot but thats about it. I can plug the rest of my rig into the fx loop and get a great sound thru my TS-9. I'll try workin the 1/4" in and out. thX!
Well, I think that sounds normal as far as the tubes go. If the fx input works, but you don't get sound from the input jack.... and you're sure its not the cable, not the guitar, and not the volume, and it is plugged in... and you still get some signal (intermittently? or just quiet?)... then it's most likely a dirty input jack or a bad soldering joint.
You can try to fix it if its the first.... plug in and unplug the cable in the input jack a couple dozen times. Seriously. If its a dirty jack, that should fix it.
If that doesn't fix it, it's probably a bad soldering joint, you should have an amp tech take a look at it.
Saul