We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [vacuum-tube]

A device controlling electric current through a vacuum in a sealed bulb, usually made from glass. Vacuum tubes are now less common, but they are used in high end guitar, bass and some other amplifiers.

Filter by
Sorted by
Tagged with
1
vote
1answer
44 views

Can I connect a microphone to a valve amp? [closed]

Is it possible/a good idea to plug a mic into a valve amp? I've heard that the output of a mic is too high for it. Anyone know if this is true? Since I don't want to try it out.
2
votes
2answers
356 views

Tube amplifier buzzing

I'm having some issues with buzzing coming the amplifier. When I turn the amp on I get a buzzing noise from the speaker. I've found that it's related to the TV in the next room, when this is turned ...
0
votes
1answer
90 views

Tube Amp to Headphones

I have a B-52 AT-100 all-tube amplifier head. I currently have it connected to a LINE-6 Spider 412 four-speaker cabinet. In order to really drive the tubes, I have a vintage Scholz Power Soak, which ...
3
votes
1answer
2k views

What is a buffered effects loop in a guitar amp?

I've just purchased an Orange Rocker 15 combo valve guitar amp and one of its features is a valve driven effects loop also referred to as a buffered effects loop. What does this actually mean? I'...
1
vote
2answers
688 views

my Fender Super Champ X2 makes a whooshing sound, will new tubes fix this?

I have a Fender Super Champ X2, a couple years old (bought it used). When I first turn it on, it makes a noticeable, but not deal-breaking, swirling/whooshing noise for five or ten minutes until it's ...
3
votes
1answer
550 views

keeping tube amps in optimal condition

Over the holidays I acquired my first tube amplifier, a VOX VT20X. I'm not really sure whats required to keep a tube amp sounding its best for as long as possible or if they even require special ...
3
votes
6answers
2k views

Do vintage guitar amplifiers really sound better when run at lower voltages?

I got a Marshall JCM800 2203X about a year ago and on the back of the amp it has selectable input voltage settings for 110V, 220V and 230V. Since I live in the US, the voltage that comes out of the ...
0
votes
3answers
2k views

How can I connect an external cabinet to use it at the same time as a combo amp's built in speaker?

I have combo amp with a 12 inch speaker that runs at 8 Ohms. I have a 1x12 cabinet that runs at 16 Ohms. I would like to use the combo amp speaker and the cabinet at the same time. The combo amp has ...
2
votes
1answer
95 views

Potential Tube Amp Issue

So, I cocked up today. I recently moved house and dragged out my amp head and cab today, hooked everything up and was jamming away to check it all still worked fine. Sounded a little odd, but I put ...
4
votes
4answers
3k views

1 of 4 power tubes went bad; buy a matching quartet or replace the one?

I have a Peavey Windsor running Ruby EL34B-STR's. One of the power tubes went bad. I can order another Ruby EL34BSTR and re-bias the amp (idk if it has a bias for each tube or not) and I assume it'...
3
votes
1answer
336 views

Preamp Valve gone in 'hissing' amp?

Roughly 3 years ago, I purchased a VHT Special 6 Ultra (Combo) Valve Amp. It has recently been 'hissing' (not sure if this is the correct description), and this noise increases with higher wattage and ...
5
votes
3answers
10k views

How to buy the “right” power attenuator for a tube amplifier?

I want to get a tube amplifier, but the tube amplifiers I fancy are generally at least 22W. I live in an apartment with thin walls, so I have to get it down to conversation/TV volume. This brings me ...
11
votes
3answers
6k views

Tradeoff between powering off and leaving tube amplifier on during breaks

Life span of a tubes(both pre-amp and power-amp tubes) depends on amp "usage" And/Or how often you turn on and turn off your amp. But I need some clarification definition on the word "usage" Because ...
6
votes
6answers
13k views

What's the best choice to get more gain out of a tube amplifier

The story behind this question: I got myself a nice little combo for my bedroom-workouts (related to playing guitar, of course :D ), a Blackstar HT1-R which is a lovely little 1 watt 2 channel ...
23
votes
4answers
3k views

When should I be concerned about calibrating the bias of vacuum tubes in an amplifier?

I think it would be useful to discuss the concept of bias as it pertains to guitar amplifiers. I have read some articles saying that you should always rebias your amplifier when you change the power ...
14
votes
2answers
8k views

What do the different tubes in an amplifier do?

Preamp vs Phase Inverter vs Reverb vs Power vs Rectifier. Many people get really, really confused when they try to understand anything about tubes. I spent a very long time myself trying to ...
31
votes
7answers
123k views

How do I know when it's time to change a tube on my amplifier?

I think this would be a wonderfully instructive question to people who are new to tube amplifiers. In short, how do I know that it's time to change a tube, and what's a good strategy for figuring out ...
29
votes
8answers
6k views

Why do tube-based guitar amplifiers sound so good?

Is it just a cultural thing ("they've always sounded that way") or is there some basis in music theory for this?