Had my MC275 set up just the way I liked it yesterday in the cool afternoon. Today just before a storm was due to pass through the humidity was much higher than yesterday, and I noticed a discernibly less pronounced sound from my tweeters. It sure seems the humidity has affected the HF in the air, much less than lower frequencies as we all know suffer less loss due to molecular vibration ect....
Am I right in assuming this? has anyone else noticed this with their system? I posted it in Valves/tubes forum as the amp is tube based....
Discussions? / comments?
Am I right in assuming this? has anyone else noticed this with their system? I posted it in Valves/tubes forum as the amp is tube based....
Discussions? / comments?
Humidity does affect HF, but that doesn't begin until you're up around 900MHz or so.
Am I right in assuming this? has anyone else noticed this with their system? I posted it in Valves/tubes forum as the amp is tube based....
Discussions? / comments?
Paper speaker cones? These are audibly affected by humidity.
Its possible also that your speakers are so perfectly sealed that a pressure system coming in could affect its volume and not be fast enough to adjust to a pressure change such as a thunderstorm.
By pushing against the cones.
It might not be your ears at all, it could be your speakers. What kind of speakers do you have? It wouldn't affect a ported setup, lol.
You might want to add a stylish brass pressure screw valve to them so that you can adjust for this whenever it occurs.
http://www.ebay.com.au/itm/Green-Pl...ial_Industrial_Supply_MRO&hash=item4d06797ea1
By pushing against the cones.
It might not be your ears at all, it could be your speakers. What kind of speakers do you have? It wouldn't affect a ported setup, lol.
You might want to add a stylish brass pressure screw valve to them so that you can adjust for this whenever it occurs.
http://www.ebay.com.au/itm/Green-Pl...ial_Industrial_Supply_MRO&hash=item4d06797ea1
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... what is the connection between this thread and tubes?
Wondering,
Andreas
EDIT: Just found the O/P's statement about that. With the same reasoning, it could have been posted in the PS forum, as the amp almost surely has a power supply. Or in the digital sources section as you probably used a digital source.
Wondering,
Andreas
EDIT: Just found the O/P's statement about that. With the same reasoning, it could have been posted in the PS forum, as the amp almost surely has a power supply. Or in the digital sources section as you probably used a digital source.
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Or the ears section, of which there is none, the OP suspected it to be a problem with his amplifier, which it could still be.
For all I know there could be a faulty/cracked tube socket which is being affected by higher humidity.
There might even be a change with the specifications of the output transformers under high humidity, maybe they have an issue which is causing them to act like an air capacitor = affected by moisture. Though I suspect the OPT's in this amplifier are sealed/potted in epoxy, clarification? It is possible that they've been overheated/stressed and that has caused the epoxy to leak out, especially if its wax insulated, who knows! Though I doubt....
There could be moisture building up on the volume control, which would alter the conductivity between the knob axle and the chassis/thread portion of a pot.
For all I know there could be a faulty/cracked tube socket which is being affected by higher humidity.
There might even be a change with the specifications of the output transformers under high humidity, maybe they have an issue which is causing them to act like an air capacitor = affected by moisture. Though I suspect the OPT's in this amplifier are sealed/potted in epoxy, clarification? It is possible that they've been overheated/stressed and that has caused the epoxy to leak out, especially if its wax insulated, who knows! Though I doubt....
There could be moisture building up on the volume control, which would alter the conductivity between the knob axle and the chassis/thread portion of a pot.
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Generally, rain and thunder storms are preceded by lower atmospheric pressure (look at any traditional aneroid barometer). High pressure is generally associate with good weather. But in any case, the pressure swings are in mostly the region of + / - 2% relative to the norm. Unlikely in itself to make a noticeable difference to the audio.
Yeah it was too late for me to go back and edit that by the time I realised.
OP: You wouldn't by any chance have any (supposed to be fully sealed) mica/ceramic capacitors installed in-circuit? does it happen on both channels at the same time?
I bet that if you have a couple of silver mica/ceramic capacitors with cracks in them that they would be affected by humidity.
http://amfone.net/Amforum/index.php?topic=4906.0
Are you using a crossover in your speakers by any chance? Might want to check the capacitors or chokes for variances in performance under high humidity environments...
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Relative Humidity, et al.
Our physical universe is affected by temperature, atmospheric pressure and humidity.
Amplifiers and their constituent parts are affected by these factors.
Speakers and their constituent parts are affected by these factors.
Connecting cables, wiring, etc., is affected by these factors.
The air around us is affected by these factors.
Our physical environment, i.e., room artifacts, is affected by these factors.
Our mood is affected by these factors.
And finally our mood has an effect on our perception of our environment.
So if you heard a difference then it is very likely that there was a difference.
fred p.
Our physical universe is affected by temperature, atmospheric pressure and humidity.
Amplifiers and their constituent parts are affected by these factors.
Speakers and their constituent parts are affected by these factors.
Connecting cables, wiring, etc., is affected by these factors.
The air around us is affected by these factors.
Our physical environment, i.e., room artifacts, is affected by these factors.
Our mood is affected by these factors.
And finally our mood has an effect on our perception of our environment.
So if you heard a difference then it is very likely that there was a difference.
fred p.
Only if the OP's Eustachian tube's are blocked. Otherwise they will equalise the pressure. As others have pointed out, storms have lower pressure than normal.freax said:
Some excessive extrapolation going on here? Audio kit (apart perhaps from speakers) should not be unduly affected by levels of temperature and humidity which humans can cope with. However, as you say, humans can be greatly affected by the environment.ppfred said:
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