tube fanatic
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Posts posted by tube fanatic
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Apologies if anyone has already posted this:
https://abcnews.go.com/US/wireStory/ap-source-detroit-automakers-shut-factories-69666401
Maynard
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2 hours ago, shepjk01 said:
To quell a few mis conceptions no one is holding food back. People are way over buying. You cant grow more vegetables,fruit, and meat products overnight. Grocery items are forcasted based on demand from previous years. When all the sudden you have people cleaning out a weeks supply in a day it takes time to replenish items.The only way right now to get items back in stock is to limit peoples purchases to only 1 or 2 of each item. I'm at maintenance manager at a Walmart perishable food DC and we are shipping out record volume. You only have so many trucks and trailers available to deliver to stores.
I just got back from one of the local, smaller, supermarkets where I spoke with the produce manager whom I’ve known for 25 years. He said that they are receiving only 20% of their normal delivery quantity and have not been able to get any chicken or beef for more than a week. He said it’s being withheld at the warehouse for unknown reasons. Yes, people are over buying because availability has become so spotty they need to get it when they can. It’s seems that the food shortage is intentional.Maynard
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Hi Marty- the resistors are for controlling filament voltage, not hum. I’ll try to help you out with this as soon as I can free up some time. I’ve had to readjust some priorities in view of what’s going on.
Maynard
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The local markets are not receiving their usual quantity of fresh food (especially chicken) and they don’t understand why. Organic fresh food is suddenly nonexistent.
Some older folks, who live alone, and have no family, are spending hours driving from one store to another in an attempt to maintain their “fourteen day supply” in case they get sick. The shop from home services from the markets are booked for over a week and orders are being delivered without many requested food items.
So, who is behind the food shortage? To me, it seems very deliberate as it is targeting those who are the most vulnerable.
Maynard
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It wouldn’t surprise me if this situation turns out to be a method of population control as advocated by many over the years. Some of the following quotes paint a grim picture:
Also, Kissinger’s 1974 NSSM 200 report contains frightening implications. It is available on line for those who want to read it.
My friends in the medical field often talk about how lethal pathogens seem to “escape” from bioterrorism labs. And, biological agents have been tested on our own citizens without knowledge or consent going back to the 1930s (the Tuskegee syphilis study and, Operation Sea-spray come to mind).
My area now has severe food shortages and it is only a matter of time until rioting starts.
Maynard
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1 hour ago, Marvel said:
I'm sorry, Maynard. Most of the infowars stuff is crazy conspiracy theories.
Boyle’s credentials look impeccable to me, and he was certainly trusted by our own government. Why should I doubt what he says?https://law.illinois.edu/faculty-research/faculty-profiles/francis-boyle/#about
Maynard
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Some interesting food for thought here.....
I read this and a bunch of related material. Draw your own conclusions.
Maynard
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Some doctors I know truly believe that what we are going through was planned:
This statement seems to smell a bit to me, but maybe I’m just paranoid.
Maynard
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Thanks for posting that Marty! It’s an excellent method, and one which I have never used. It certainly makes things easier if there’s little room under the chassis for locating replacements.
Maynard
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Generally, Klipsch speakers work extremely well with tube amps in my experience. SETs are usually immune to speaker impedance variations, as are pentode based amps which employ negative feedback. Can you provide details about your listening situation such as level, type of music you listen to, distance from the speakers when listening, size and characteristics of the room, etc.? Of course, synergy between amps and speakers is important and it may be a case of those amps not providing the type of sound you enjoy due to their output transformer characteristics or other factors.
Maynard
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NEVER substitute a filament type rectifier for a cathode type without checking the working voltage rating of the power supply electrolytic capacitors! This needs to be significantly higher for the former type of rectifier due to the peak voltage the caps will "see" at initial turn-on. Cathode type rectifiers allow power supply caps to be used with a much lower working voltage.
Manufacturers typically select tubes for a specific reason. Indiscriminately changing to something else isn't always a wonderful idea.
As to the "sound" of rectifier tubes, I can only say that if the tube delivers the correct voltage to the circuit as designed, all is well.
I urge you to call the manufacturers of your amps to discuss any changes you contemplate.
Maynard
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I found this very funny.....
Maynard
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7 hours ago, Brenda said:
Power amp.
The amp you ordered is an integrated type (built in preamp section). Do you also have a preamp that you plan to use with a power amp? When you get into vinyl you will likely need an external phono preamp.
Maynard
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With low level listening any of the amps should be fine. You won’t have any idea of how they would sound until installed in your system. It is difficult to base a purchase decision on reviews or what others like. Where are you located? Perhaps someone reading this is near you and has one of these amps for you to try.
Maynard
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Single ended amps generally sound somewhat different than push-pull amps. Also, more information is needed about your listening levels to determine whether the single ended amps will provide enough power.
Maynard
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Joe, given how easy it is to manually bias, and how infrequently it needs to be done, are you sure you want to make such a substantial investment?
Maynard
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If you base your amp purchase on what someone else prefers you may wind up very disappointed! The only way to know what will satisfy you is to hear it in your system. Companies like Decware allow you to return equipment if you are not satisfied. I don’t know if Bob Latino does the same with amps which his techs have built. If you state your location there may be forum members nearby who can bring something over for you to try. Even the Dynaco amps you heard may not produce the same result at your house.
Maynard
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No time to take a screenshot, so here's the link to the article on page 32:
I'm posting this to highlight the fact that it is impossible to make an out of context (i.e. in a system other than your own) judgment about how a component may sound in your system. Jeffrey's view that listening at RMAF conveys a different (unique?) perspective is one with which I disagree totally. Anyone who has auditioned the same speakers, amps, or anything else at different audio dealers understands the point that I am making. This is why some dealers, or online sellers, offer a return option for the equipment that they sell. Even The Cable Company has a "lending library" of cables for you to try in your own system (https://www.thecableco.com/lending-library)! It's unfortunate that the same doesn't exist for tubes!
Maynard
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Norman Crowhurst, whose credentials are well known, shares an example of why listening at a show (or anywhere other than in your own system) can be deceiving:
Maynard
Can't get photo to load- will try later😀
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Forgot to mention that the input sensitivity of the 8 may, depending on your sources, allow the use of a passive line stage instead of a preamp. With LSs, the power need is often so low that this can work out quite well.
Maynard
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Although some work has been done on this, it may need a great deal more so you need to consider the cost of a total restoration. Read through the following thread before you purchase as it will provide you with much useful information:
https://audiokarma.org/forums/index.php?threads/ultimate-marantz-model-7-restoration-thread.727823/
Maynard
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“I don't like 99.9% of the commercially available amps.“.
I must assume that you have heard all of the commercial amps. That is quite an achievement! You have not heard even a fraction of the amps designed and built by guys who do not publish their work and limit their activities to local areas. Once again, I do not believe in blanket recommendations as it is impossible to know what the other person is hearing. Perhaps I am blessed by not being able to hear the polarity of a wire, color differences of cable ties, or a 1/16” difference in wire length. It keeps my life more simple.....
Maynard
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Jeffrey, since this thread is being followed by so many I want to go on record by saying that there are many in the field who neither agree with, nor share, your design philosophy. Some of the finest sounding tube equipment is based on established engineering principles which differ from yours. Your blanket condemnation of commercially available equipment is ridiculous. I advise buyers to use their own ears (not yours!) to determine which equipment will best serve their listening preferences.
Maynard
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Thank you for finally conceding the point that I've been trying to make here! So, while your suggested modifications to George Wright's amp design may have some degree of technical merit, to some listeners it will result in what they perceive as poorer sound! The first paragraph of the following states the case better than I can:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3578393/
Time for dinner......
Maynard
Corona Virus Disease/(SARS-CoV-2) II
in Lounge
Posted
Women on a forum my wife hangs out on are talking about a “baby boom” resulting from the current confinement. Given the possibility that this virus could be spread through semen should raise some concerns. The CDC has no information about this yet.
https://www.sciencemag.org/news/2017/09/human-semen-can-host-27-different-viruses
Maynard