Interested. Why not a small microcontroller with an LED display, that is resettable? You could do a current sensing "tap", so you know when that device under test is on; no need for a thermistor or to plug in to the power conditioner. With battery backup. :-)
Would anyone like a tube hour counter for amps that don't have this function ?
I am planning and designing a small, attractive, external tube hour counter, and I would like to get a sense if anyone is interested in this for themselves. If so I may be compelled to make a batch of these at the same time Rather than just one.
I have an audio research VT100 mkII and and LS25. I really like these amplifiers, but neither of them have a way of tracking tube hours. I know I can just listen to the tubes to determine shortcomings, but I'm also an analytical sort of guy, so having an accurate tube hour count would be useful to me.
my plan is to use a digital, non-resettable, industrial hour counter. I am planning to recess this into a small aluminum enclosure with professionally machined openings for the Digital counter as well as the power cable coming out of the back. The plan is to use a Black anodized aluminum body with natural aluminum face plate and rear plate. A power cable coming out the back and be terminated to a standard household grounded plug. There will be rubber deer on the bottom. The device will be small: perhaps about 4 inches wide, 2 inches tall, and 4 inches deep.
I have a six outlet power conditioner with one outlet free. To use this hour counter, I will plug it into my conditioner, I will switch off the power on the conditioner when I'm not using the amplifiers. When I switch on the Power conditioner and subsequently the amplifiers, The hour counter Will begin its count.
For those of you who plug their power amplifier directly into the wall, I suspect that many of you will still plug your preamplifier or other components into a conditioner or strip of some sort. In that case this tube hour counter will still work for you, unless you just turn on your power amp from time to time for fun!
Since I will be re-tubing my power amp soon, this is a perfect time for me to add this to my system. I plan to use my small label making machine (brother p-touch style) to put a label on the bottom of the aluminum enclosure that has notes on the install date, tubes, and hour counter numbers.
For example, I may just change the power tubes on my amplifier and not touch the signal or driver tubes in the power amp, or the preamp tubes in the preamplifier at this time. When I go to change those smaller tubes in the future, I will notate that change and log the hour count in a small note on the Label Maker, and stick it to the bottom of the enclosure. The hour counter will be non-resettable to avoid tampering or mistakes.
I'm not yet sure about the price of something like this, I'm doing the research now. Since it has to sit on my audio shelf, I don't want it to look like a piece of junk or a children's science project. Because of that, I will use professionally sourced parts, quality machining, and thoughtful design, planning, and careful assembly.
I suspect the final selling price may be in the neighborhood of $100 - $200. But that's just a wild guess at this point. If anyone's interested please let me know and I will consider making several of these instead of just one for me!
Take care,
Mark
I have an audio research VT100 mkII and and LS25. I really like these amplifiers, but neither of them have a way of tracking tube hours. I know I can just listen to the tubes to determine shortcomings, but I'm also an analytical sort of guy, so having an accurate tube hour count would be useful to me.
my plan is to use a digital, non-resettable, industrial hour counter. I am planning to recess this into a small aluminum enclosure with professionally machined openings for the Digital counter as well as the power cable coming out of the back. The plan is to use a Black anodized aluminum body with natural aluminum face plate and rear plate. A power cable coming out the back and be terminated to a standard household grounded plug. There will be rubber deer on the bottom. The device will be small: perhaps about 4 inches wide, 2 inches tall, and 4 inches deep.
I have a six outlet power conditioner with one outlet free. To use this hour counter, I will plug it into my conditioner, I will switch off the power on the conditioner when I'm not using the amplifiers. When I switch on the Power conditioner and subsequently the amplifiers, The hour counter Will begin its count.
For those of you who plug their power amplifier directly into the wall, I suspect that many of you will still plug your preamplifier or other components into a conditioner or strip of some sort. In that case this tube hour counter will still work for you, unless you just turn on your power amp from time to time for fun!
Since I will be re-tubing my power amp soon, this is a perfect time for me to add this to my system. I plan to use my small label making machine (brother p-touch style) to put a label on the bottom of the aluminum enclosure that has notes on the install date, tubes, and hour counter numbers.
For example, I may just change the power tubes on my amplifier and not touch the signal or driver tubes in the power amp, or the preamp tubes in the preamplifier at this time. When I go to change those smaller tubes in the future, I will notate that change and log the hour count in a small note on the Label Maker, and stick it to the bottom of the enclosure. The hour counter will be non-resettable to avoid tampering or mistakes.
I'm not yet sure about the price of something like this, I'm doing the research now. Since it has to sit on my audio shelf, I don't want it to look like a piece of junk or a children's science project. Because of that, I will use professionally sourced parts, quality machining, and thoughtful design, planning, and careful assembly.
I suspect the final selling price may be in the neighborhood of $100 - $200. But that's just a wild guess at this point. If anyone's interested please let me know and I will consider making several of these instead of just one for me!
Take care,
Mark
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- 32 posts total
I have had tube equipment for more than 15 years. My first tube amps were a pair of Antique Sound Lab Hurricanes. Very cheaply built but they sounded great. After about 8 years I began to have a lot of crackling in one amp. Customer support was excellent. They instructed me to clean the tube sockets and pins. I did and the problem was solved. My point is that before going through the expense of replacing tubes try the cheap solution: clean the pins and sockets. |
You can buy hour meters for cheap on Ebay for as cheap as $5. If you have a basic idea about simple wiring you can hook it up and it will run only when your gear is on. And will count up to 10,000 hours, plenty for any audio use.The link here is a good example but you will find many with subtle differences, colors and features. Although simple is best. http://www.ebay.com/itm/Waterproof-Hour-Meter-ATV-Motorcycle-Dirt-Ski-Mower-Boat-Bike-Engine-Digital... DM |
Ediver, what an excellent suggestion! are you referring to a device similar to this: http://www.ekmmetering.com/split-core-ct-200a-200a-26-6ma-13mm-0-51-hole-diameter-sct-013-200.html Do do you think there is any possibility of introducing any negative effects to the AC (think crazy audiophiles here) with a current sensor clamped around someone's AC cable? Or do you think this will be fully invasive? I was researching peter's temperature suggestion, and it still holds water, but sensing the current sounds even better. Perhaps I can design a simpler and cheaper device this way. also, the temp probe was always looking to be an issue. How do you ensure it stays in place, etc. the current sensor clips to the power cable, seems like a great way to go. I am sure I can hack this thing together, but I actually want to design a thoughtful, attractive, high quality device at a reasonable cost. We shall see if anyone buys one, but I will be the first customer :-) russ - agreed, replacing tubes is not the only answer, but I do feel that knowing how many hours one has on their tubes is useful data... dark matters, indeed, I have been looking at the full gamut of hour counters from $5 cheapie all the way to $100 fancy ones. I found some in the $20 range that look quite good. thanks for the input everyone! Please share any more ideas, they have all been inspiring! |
The question is how to get the split core current sensor to communicate with the hours counter. I am unclear about what kid of signal the hours counter requires, and whether the current sensor would provide this signal or if there would need to be some sort of "translator" in between. Thoughts on that? If you make a reasonable looking device (not aluminum billet), I think this is an accessory you could sell online and perhaps through online companies (e.g. music direct). Personally, I don't require anything fancy looking, just reliable. I think most people would tuck it out of the way and only look at it from time to time to see how many hours they are putting on their tubes. |
- 32 posts total