| Author | Message | ||
     Finishlapan |
Hi all, I have a music man HD-130-2-10 and am having problems with the red power light, it goes out on Low Power but works on High Power...any idea what is wrong?...thanks | ||
| michael kaus |
I've seen this before on some amp. The light is neon and requires a certain amount of voltage to fire it(obviously!) and when in the low power setting, the power to the light circuit is halved also. It's nothing to worry about, just anoying. Mike. | ||
| Finishlapan |
oh, I did see the posting after i left mine...thanks. Can it be replaced/... I think seeing the light off when the amp is really on may be the only problem... | ||
| Steve Kennedy (admin) |
This can be a problem with the older models that have their Low/High power switch on the Primary side of the power transformer. When new they work fine but after the neon bulb inside the pilot light gets weak after 30 years they won't fire on the Low Power setting. What I would do is to remove the Neon Pilot Light assembly entirely, then disassemble it to reveal the internal neon bulb. Buy a new bulb, replace it, test it then reassemble the Pilot Light assembly and reinstall in the amp. This will keep the original look of the amp but will give you a brand new neon bulb. Steve | ||
| c. |
if you can disantle the bulb, would it not be possible to put a blue lense in it? | ||
| Steve Kennedy (admin) Username: admin Registered: 03-2002 |
A standard neon bulb only puts out light in the wavelengths that cover yellow, orange and red. Putting a blue lense on a neon bulb would result in a dim pilot light. If you want BLUE, then I would wire in a super-bright Blue LED and dropping resistor off the preamp power supply (16Vdc). A 1.5k or 2K resistor would do it. Steve | ||
| Walter Jowers (sonofswamp) Username: sonofswamp Registered: 08-2006 |
Because I'm lazy and don't want to pull out the tray, can any of you tell me if the hole for the neon bulb is about 3/8" - 13/32"? If that's the right size, I've found a supplier at http://hoffmanamps.infinology.net/MyStor e/perlshop.cgi?ACTION=thispage&thispage= parts20.htm&ORDER_ID=124569671 Thanks, WJ | ||
| Jay Hammond (jead) Username: jead Registered: 01-2011 |
Anyone find a source for the bulb? | ||
| Terry Loose (terry) Username: terry Registered: 05-2006 |
http://www.alliedelec.com/ Part #931-4165 for Red Part #931-0015 for Green |