| Author |
Topic: hilton lowboy |
Roger Russell
From:
Jane Lew ,Wv
|
Posted 6 Jul 2016 1:57 pm |
|
in need of a transsistor in a hilton low boy pedal the transstor got very hot and you cant only see some of the numbers..i have left email with hilton but not sure if they are getting thru thanks for any help in this matter the numbers readable are 78MOE there is one before the E but it is burnt..also some numbere readable are 24263 thanks again
Roger |
|
|
 |
Georg Sørtun
From:
Mandal, Agder, Norway
|
Posted 6 Jul 2016 5:21 pm
|
|
Probably a 78Mxx Positive Voltage Regulator - not a transistor.
Before replacing it the reason it gets very hot has to be found and fixed, as those regulators rarely ever fail unless they have been overloaded.
Advice: give Mr Hilton a chance to reply before doing anything. |
|
|
|
Keith Hilton
From:
248 Laurel Road Ozark, Missouri 65721
|
Posted 6 Jul 2016 7:44 pm
|
|
Roger, I answered your e-mail. Check your e-mails.
The 3 leg part you mentioned is not a transistor, it is a Texas Instruments Rail Splitter TLE2426. It divides the rails up into plus and minus with a audio ground.
The only thing that can make it hot is huge voltage being fed to the pedal. In the last 20 years I have never seen one burn up on the outside. When over voltage hits, it has to be over a protective 27 volt diode, then above 30+ volts. When the part gets over voltage it shorts out internally, and "NEVER" shows burns on the exterior.
Something dramatic has happened. What was plugged into the pedal? |
|
|
|
Roger Russell
From:
Jane Lew ,Wv
|
Posted 7 Jul 2016 9:12 am hilton
|
|
| yes Kieth answered the question and i forwarded the info to the guy who needs the help with this thanks kieth for your help and quick response ..Hilton is #1 |
|
|
|
Donny Hinson
From:
Glen Burnie, Md. U.S.A.
|
Posted 8 Jul 2016 5:15 am
|
|
| There's a chance that the pedal was plugged into an older amp that had no 3-prong ground plug, an old AC/DC tube amp, or even a newer amp that had a bad cap and a "lifted" ground, causing line voltage to appear on the chassis. In any case, the amp should be checked first, and then pedal should be repaired. |
|
|
|
Keith Hilton
From:
248 Laurel Road Ozark, Missouri 65721
|
Posted 8 Jul 2016 8:45 am
|
|
| Donny, you are right on target. I have a lot of protection built into the circuit. If there is enough voltage no protection will work. The old tube amps can easily produce 600 volts to chassis with the problems Donny describes. I have fuses on each power rail, the transistor input, and output junctions protected with diodes strapped to the power rails. I have DC protection on the input and output, and I have RF protection designed in. Also have a zener protective diode across the power input, and current limiting resistors all over. It is impossible to protect against all failure modes. For example: I have had pedals come in for repair that have been under water. I am guessing from a flooded basement. |
|
|
|
