Hi,How long time does it take to preheat the tube? I hooked them up for 1 hour and still didn't see it heated, nor with any sound. Thanks.
447784
It doesn't take long maybe less than a minute...... You probably got a bad one.... Check to see if you have it connected correctly... if that is not the issue return it for a replacement that works, you will not be disappointed if you get one that works.
447785
One minuet and it is class A power if your tube is not getting warm or hot there is a problem is it lghting up when you turnit on
447786
If you expect to see the classical glow of a fifties valve amp this will not happen. The glow of this valve is near invisible. However, you get sound right away as you turn it on, most people want to burn these in to get optimal sound quality but it will work as soon as you power it on and you see the power led and the blue valve illuminator led go on. If you have no sound something is wrong either you got a defect amp or your cable isn't hooked up right. Good luck and ask again if something's unclear.
447787
Something is certainly messed up. Few minutes tops.. It could be power supply..jeez... Dead Upon Arrival. I've had good luck with mine though....
447788
I would check to see if your tube is not inserted all the way. The amp should work within a few seconds of turn on. The tube won't get warm for a few minutes, but the amp will sound fine moments after start.
447789
For sure it shouldn't take an hour. Mine heated up almost instantly. You may have your wires connected improperly.
447790
HelloThe tube preheats and sound should be present in the headphone within 30-60 seconds. if the tube doesn't heat at the end of 30-60 seconds, you have a malfunction. You should send it for repair and ask for a replacement unit. If you insit, they might send you a replacement unit before they receive the faulty unit back (can take a few weeks, as it is in China).
447791
Only need a few minutes. The tube is in a buffer stage. So, it doesn't increase the signal gain. Just sets the impedance to the headphones and add a bit of tube "flavor" to the tone. Most of these cheaper headphone preamp-amps are setup this way. Voltage applied is low, as is current through tube. It will never get as hot as tubes used in input and gain stages. HTH!
447792
About one minuet you have to plug in power supply ann the red and white have to have a aud signal I got my non powered signal from the red and white on the cable box for tv audio it works great for stereo audio im not sure hope that helped.
447793
One minuet one hour is way to long doe you do you have audio signal thebred and white / right and left signal or you won't get sound.
447794
Check your speaker connections,and the speaker cords need to be the same length.mine takes 35-40 seconds before you can hear music.Jb
2103965
Its been my experience that they do get warm depending on the size. But electrical buzzing I've never encountered. If it gets hot like alarmingly so then I'd err on the side of caution and send it back for a new one. Mass production has its limits i guess.
334456
It should heat up your tank within a couple hours, maybe you have a faulty heater :(
224787
It takes a good 5 minutes to heat up it also depends on your water you need distilled water and not tap. Do you hear any noise?
902543
Sorry, I have not used them yet. Its recommend that it be a certain temperature at the time of instillation.
252125
They are LEDs so you shouldn't have a problem. I didn't notice them getting all that hot. Granted, I haven't left them on for hours at a time and then tested.
1742367
I grilled mine on a fairly hot grill for around 6 minutes a side. They were just done through. YMMV
41275
I've never seen other brands or products like this, that aren't actually an electrified hot plate. Has anyone seen others? My alternative was running them under hot water, which is a lot more work & waste (water, gas, time, & have to dry them). These I just pop in the microwave for 25-30 seconds depending on the size of the plate. I'm reluctant to try things like microwaving them in a damp towel.
1775796
They would take a really long time with a lighter. I use my stove and it takes 10-15 minutes. If you can't use the stove a small fire will sometime be a better alternative. I have not been able to use a lighter to light one it would just take too long.
1796968
I went to Walgreens and got a cheap $10 coil burner so I didn't have to light these on my stove. I throw them on till one side is glowing red flip it then wait for it all to glow. Usually takes like 10 minutes to light three.
453572
I had mine on at an event for up to 8 hours after I first got them and they never seemed to get too hot. If you feel they are getting too hot you may have a defective unit.
2007462
Well...Since it is December I haven't ridden at all. MY issue is that I am wondering whether or not to take the baffles out. It's easy to do.. Heat shields? Never seen em. They do get hot though.
734440
I would have to agree with the others, about 5 min is good, but if you want to pre heat to 400 I think that will take a bit longer.
1983170
Might be something wrong with your unit. Ours heats up in a matter of minutes
1170735
It is so easy! Just put in your packs, fill it with waster to about an inch from the top, plug in and make sure the correct light illuminates, and wait several hours for them to heat up. Once they do, wrap them in towels, relax and ENJOY! It's a very easy machine. Love mine!
216238
The tubes should be fully lit up no more than 30 seconds after you turn the power on. You might want to purchase some new tubes because it sounds like they were damaged either during the shipping process or they were defective. In particular, if you bought it used do you notice a lot of metal coating on the top of the tubes? If so then those ones might be burned out already. But if you have the tubes tested and they are still good then check the power jack-plug as Shikai Liu suggested.
2057346
I don't use the preheat, my husband does. I think it stays on for 8 hours and then shut off. I put mine side on about two hours before I get into bed so it is really warm. If I don't turn it off wit him 12 hours it auto shuts off. WE LOVE IT!!! I hope it helps.