Impossible to say without being able to read the markings on the tubes.
There are many tubes that are "decent" for audio of course.
There are many tubes that are "decent" for audio of course.
It usually makes more sense to choose what you want to build first. Look at some designs which fit. Then see what tubes you need.
If you just start with a bunch of tubes it's much harder to figure out what fits. Anyway, plenty of tubes are cheap enough so you don't need to start with the ones in your picture unless you're in a very remote part of the world.
If you just start with a bunch of tubes it's much harder to figure out what fits. Anyway, plenty of tubes are cheap enough so you don't need to start with the ones in your picture unless you're in a very remote part of the world.
If you're genuinely interested, then list the tube numbers. Otherwise, this is just another one of your fishing threads, where everyone's left wondering.
jeff
jeff
None of those tubes appear to have lost their vacuum. None appear to be "typical audio tubes with two possible exceptions. Far left in middle row may be a _BQ5 or _L84. Number 3 from left in the bottom row may be a _AQ5.
Two, possibly three are obviously high voltage rectifiers from TV applications and have no possible use an a typical audio application. Those are the one with the green stripe and the two to its left in the middle row.
Beyond that the terms "decent for audio" have a very broad definition depending on what you want to build and who is building it. Most of these appear to be TV tubes. I have been building HiFi and guitar amps with TV tubes for 50+ years, but many mainstream audiophiles shun them.
I see one type number that starts with 3 which is USA speak for a 3 volt series string heater. Another starts with P which is a Euro spec series heater. If all have odd voltage heaters with different specs, it could be difficult to construct something with more than one tube.
Assuming a few tubes with similar heater specs, making a simple guitar amp from that collection would be easy for someone who could make up a circuit without a schematic. Building a stereo HiFi amp would be a challenge since no two tubes appear to be the same.
As stated nobody can go further than this guess without tube type numbers. From there it would be wise to look up the data sheets to see what their intended use was. Many oddball tubes can be adapted to audio use, but that often takes more technical skill than building from a known good schematic. with the tubes specified in the schematic.
Two, possibly three are obviously high voltage rectifiers from TV applications and have no possible use an a typical audio application. Those are the one with the green stripe and the two to its left in the middle row.
Beyond that the terms "decent for audio" have a very broad definition depending on what you want to build and who is building it. Most of these appear to be TV tubes. I have been building HiFi and guitar amps with TV tubes for 50+ years, but many mainstream audiophiles shun them.
I see one type number that starts with 3 which is USA speak for a 3 volt series string heater. Another starts with P which is a Euro spec series heater. If all have odd voltage heaters with different specs, it could be difficult to construct something with more than one tube.
Assuming a few tubes with similar heater specs, making a simple guitar amp from that collection would be easy for someone who could make up a circuit without a schematic. Building a stereo HiFi amp would be a challenge since no two tubes appear to be the same.
As stated nobody can go further than this guess without tube type numbers. From there it would be wise to look up the data sheets to see what their intended use was. Many oddball tubes can be adapted to audio use, but that often takes more technical skill than building from a known good schematic. with the tubes specified in the schematic.
You need to identify the valves first as others have said, see - http://www.r-type.org/static/find-me.htm for an idea how to go about this. Out of a random box of say 50 unboxed valves you may find one or two that are useful in my experience unless your very lucky. The possible useful valve/s then need testing, this takes a lot of time. To be honest you'd be better off buying a valve from a known good seller.
Andy.
Andy.
Wik, do you actually have these valves in your possession, or have you simply found the picture on the internet like you've done before?
This is a good example of a thread going absolutely nowhere......
The two on the left in the top row might have anode caps as well, but might actually be useful if they are the same type (the guts look similar). One is missing pins and one isn’t, but that could be brand differences. The two on the left in the top row might be the same (but different from the first 2). But at least those four look like they are probably sweep tubes in the 18 watt range, something that could make an amp with some kick to it.
How about we see some type numbers?
Yes, the contributors are assuming that Wik actually has these tubes in his possession, but that is yet to be confirmed.
Wik has been known to ask questions based on photos he has seen on the internet.