Valves

  • Thread starter Thread starter TelePaul
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TelePaul

TelePaul

J to the R O C
Are all valve series interchangeable? Like if I want a new ECC83 for my Marshall AVT can I buy any va;ve that says ECC83 or does it vary between manufacturer?
 
an ecc83 = ecc83 = ecc83 in terms of pinouts and 'compatibility'.

by all means YES try different valves from different manufacturers. new/different valves are about the easiest and cheapest mod/change you can make to an amp and can often be quite dramatic in sound.


cheers,
wade
 
mrface2112 said:
an ecc83 = ecc83 = ecc83 in terms of pinouts and 'compatibility'.

by all means YES try different valves from different manufacturers. new/different valves are about the easiest and cheapest mod/change you can make to an amp and can often be quite dramatic in sound.


cheers,
wade
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Oh right okay, but in terms of...I dunno, volts and stuff like that they're all switchable?
 
Yes they are all 12AX7 type tubes which are 12 volt and use the same pinout. A JJ/Tesla ECC83 would be a good choice for your amp.
 
ocnor said:
A JJ/Tesla ECC83 would be a good choice for your amp.
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+1 for the JJ/Tesla. I refitted my silverface champ and my epi VJ with JJ's from eurotubes and they really sing now. MUCH nicer than the ElectroHarmonix and Sovteks that were in there, respectively.


cheers,
wade
 
ocnor said:
What problem are you having?
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A ringing undertone, like somethign is rattling inside the amp....but I opened her up and checked thoroughly.
 
That could be the tube. Does it rattle on the clean channel as well as the distortion channel?
 
ocnor said:
That could be the tube. Does it rattle on the clean channel as well as the distortion channel?
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It seems to be rattling only on the clean; hoenstly, I can't hear it under the distortion. It's annoying, but only seems to happen on certain notes. I might open up the reverb tank tomorrow. It's the only thing - along with fitting a new valve - that I have yet to check.
 
TelePaul said:
It seems to be rattling only on the clean; hoenstly, I can't hear it under the distortion. It's annoying, but only seems to happen on certain notes. I might open up the reverb tank tomorrow. It's the only thing - along with fitting a new valve - that I have yet to check.
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In anything that has tubes in it, the tube is always pretty much the first thing you check. Quick test- with the amp on and volume up, rap the tube with a pencil or something. You'll be able to tell if it's microphonic.
 
boingoman said:
In anything that has tubes in it, the tube is always pretty much the first thing you check. Quick test- with the amp on and volume up, rap the tube with a pencil or something. You'll be able to tell if it's microphonic.
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Oh, clever, I'll check that tomorrow. Thanks everyone.
 
boingoman said:
In anything that has tubes in it, the tube is always pretty much the first thing you check. Quick test- with the amp on and volume up, rap the tube with a pencil or something. You'll be able to tell if it's microphonic.
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Should I play as well, no?
 
TelePaul said:
It seems to be rattling only on the clean; hoenstly, I can't hear it under the distortion. It's annoying, but only seems to happen on certain notes. I might open up the reverb tank tomorrow. It's the only thing - along with fitting a new valve - that I have yet to check.
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That sounds more like a problem with the speaker. It could be that the speaker can't handle the lows at the volume that you are playing. You might need to use a compressor pedal in front of the amp.
 
ocnor said:
That sounds more like a problem with the speaker. It could be that the speaker can't handle the lows at the volume that you are playing. You might need to use a compressor pedal in front of the amp.
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I don't think it's the speaker, I'll try it with a compressor and see what happens.
 
mrface2112 said:
+1 for the JJ/Tesla. I refitted my silverface champ and my epi VJ with JJ's from eurotubes and they really sing now. MUCH nicer than the ElectroHarmonix and Sovteks that were in there, respectively.


cheers,
wade
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Where does one get a JJ/Telsa Wade? I'm gonna try the valve even to rule it out as a possibility. Failing that, I'm gonna ring a local guy that fixes amps and see what he thinks.
 
Track Rat said:
http://www.tubedepot.com/
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Wow thanks Mike! I was wondering about the 'tetsing', what tests should I have done? Also, if anyone's interested I sent an e-mail to Marshall tech support and got an e mail back today. I think they have representatives in different country, because the guy that got back to me - saying he was forwarding my request to an engineer - works in the music store in town. Small world, I was surprised by the good service though.
 
TelePaul said:
A ringing undertone, like somethign is rattling inside the amp....but I opened her up and checked thoroughly.
Click to expand...


95% of the time that will be a bad tube.
 
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