MORE Tube Amps 101 - Draining Filter Caps - DVD on Repairs, maintenance and more!

From our DVD - MORE Tube Amps 101 - Repairs and Maintenance - FOR BEGINNERS, with info on tube amp maintenance, troubleshooting and repair. This follow up DVD to the highly successful original Tube Amps 101 DVD takes beginners and those with a little experience on a tour thru several vintage tube amps and SHOWS you how to identify and repair common problems. Go to www.recycledsound.net for more information and to purchase this video.

Category:

Music

Tags:

• tube amp
• tube amps
• tube amp repair
• maintenance
• capacitors
• tube amp safety
• vintage amp

[LeviMan2001]

Do you recommend re-wiring these old gibson and epiphone amps to take 12ax7s instead of 6EU7s? I have an old gibson GA-15RVT that is really quiet and doesn't break up at allll. When you put a pedal through it it really gets loud though. I'm think the pre amp tubes are extremely worn out. They're 6EU7s. Anyhow, I was thinking of replacing them with 12ax7s. Also my reverb is extremely quiet, when the amp is all the way up (with the reverb all the way up too)you can barely hear the reverb Any tips?

[glprecycledsound]

@LeviMan2001 Like we say in our DVDs.... the reason to always suspect tubes first is because..........

ITs a Tube AMP! 6EU7s are generally available, so you can simply buy NOS. Rewiring for any 12 series tube would not be an easy task. But you don't comment on your POWER TUBES? Low Power most often starts there, followed by the Phase Inverter tube. Same deal with your Reverb, make sure your tube is a good one. Most Troubleshooting is wasted if not starting with KNOWN GOOD TUBES!

[glprecycledsound]

@LeviMan2001 Like we say in our DVDs.... the reason to always suspect tubes first is because..........

ITs a Tube AMP! 6EU7s are generally available, so you can simply buy NOS. Rewiring for any 12 series tube would not be an easy task. But you don't comment on your POWER TUBES? Low Power most often starts there, followed by the Phase Inverter tube. Same deal with your Reverb, make sure your tube is a good one. Most Troubleshooting is wasted if not starting with KNOWN GOOD TUBES!

[glprecycledsound]

What kind of half stack?? What kind of guitar - with what pickups?

What kind of speakers in your cab?

[glprecycledsound]

Honestly, all the resistor does is prevent a SPARK from occuring when your connecting the clips. You don't really need it at all. If you follow our steps:

1. While playing, unplug the amp from the wall - keep playing til all sound dies out.

2. Leave Power and Standby switches in the ON position.

3. Remove the chassis and connect a jumper to the chassis and Pin 1 of your 1st preamp tube (12AX7 family).

4. Wait a couple minutes then test all filter caps with your meter for DC voltage.

[2Langdon]

Thank you! Nice clear instructions and demonstration- just right for a newcomer. Appreciate it! Regards, Langdon

[glprecycledsound]

@2Langdon It is what we do in our DVDs. No technical jargon or "geekense", just easy to understand while you watch training. Our DVDs are aimed at beginners and full of all the info we found so hard to get when we started.

[LeviMan2001]

@LeviMan2001 Oh and I nearly forgot, the amp is insanely bright. Almost no bass! Would a bad tube or two cause this?

[haz939]

I'm trying to fix my class A amplifier that that has a blown mosfet, It was not turned on for 3 days and the main filter caps still had a charge only 20v mind, but still enough to make you jump short out the capacitor. I'm going to make this cable to discharge caps properly so I don't shit myself lol.

[GtrDudeL]

ha! that was the exact solution I came up with... lol. works great!

[fingerboy18]

Thanks for helping to save lives. Good way to do things!

[JedClampettJr]

Oh, come on man , just reach in there and grab it. It's good therapy!