I am sure he meant + & - and AC in. If you look up a bridge rectifier that is what's inside. 2 diodes tied front to front and 2 diodes tied back to back in a 4 diode full wave rectifier. 1N4003 diodes would be more than enough.
If it may help, a part number KBP04 crosses to an NTE 168 bridge rectifier rated 2 amps @400 PRV. Mouser.com lists this device @ $2.62 each. There are links there on a data sheet for the device with dimentions. Mouser does not have a minimum purchase policy.
Clifton
:While this is not strictly radio related I am in need of help on a SS full rectifier that wasat work in my ancient Drummel tool. It has to be 20-30 years and has been agreat tool that now can not be replaced. What Drummel did to that tool is shameful. The other nite puff smoke, shut it down and upon opening it up found a solid state full wave rectifier had burnt out. I put an ohm meter across bushes and rotated shaft and found pretty steady 18 ohms all around. Side of SS rectifier blown out. Unit has KBP 04-1 on side and a squarish design that may be manufactures logo but I dont recognize it. Diamensions are 3/4" wide, 1/2" high and 1/4" deep. four terminals on bottom, outsides are = - and inside two AC. Anyone any ideas? Sioze is important as this nests in housing. PL
:
:I did the very same thing to my air compressor when it's full wave rect blew and I gotta say...it worx...:While this is not strictly radio related I am in need of help on a SS full rectifier that wasat work in my ancient Drummel tool. It has to be 20-30 years and has been agreat tool that now can not be replaced. What Drummel did to that tool is shameful. The other nite puff smoke, shut it down and upon opening it up found a solid state full wave rectifier had burnt out. I put an ohm meter across bushes and rotated shaft and found pretty steady 18 ohms all around. Side of SS rectifier blown out. Unit has KBP 04-1 on side and a squarish design that may be manufactures logo but I dont recognize it. Diamensions are 3/4" wide, 1/2" high and 1/4" deep. four terminals on bottom, outsides are = - and inside two AC. Anyone any ideas? Sioze is important as this nests in housing. PL
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:
Thanks Cindy, I'm going through Mouser catalog now, found plenty fit electrical specs but configuration is a problem. They have them in all shapes and sizes. PL
Thanks Cindy, I'm going through Mouser catalog now, found plenty fit electrical specs but configuration is a problem. They have them in all shapes and sizes. PL
Thanks Cindy, I'm going through Mouser catalog now, found plenty fit electrical specs but configuration is a problem. They have them in all shapes and sizes. PL
I would use 400 V diodes. It's only a 120V application, but sparking from the brushes can cause voltage spikes that can kill lower voltage rectifiers.
You may want to check your brushes and commutator, as brush problems may have killed the rectifier.
I'd say Dremel did a great job to make a good tool that lasted a long time. They also chose the right rating on the diode bridge.
Rich
:::Thank you all. Warren was right the signs indicated the plus and minus leads and the AC are the two center leads. Will check that NTE unit. Size does matter as there is a holder formed in the plastic case where it rests. If too big will be in the way.
:::The label of unit says .9 Amp so 2 Amp should work fine and voltage is obviously 120AC so that ok too.Thanks one and all. PL
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::::I did the very same thing to my air compressor when it's full wave rect blew and I gotta say...it worx...:While this is not strictly radio related I am in need of help on a SS full rectifier that wasat work in my ancient Drummel tool. It has to be 20-30 years and has been agreat tool that now can not be replaced. What Drummel did to that tool is shameful. The other nite puff smoke, shut it down and upon opening it up found a solid state full wave rectifier had burnt out. I put an ohm meter across bushes and rotated shaft and found pretty steady 18 ohms all around. Side of SS rectifier blown out. Unit has KBP 04-1 on side and a squarish design that may be manufactures logo but I dont recognize it. Diamensions are 3/4" wide, 1/2" high and 1/4" deep. four terminals on bottom, outsides are = - and inside two AC. Anyone any ideas? Sioze is important as this nests in housing. PL
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:::Planigan, I have checked all that I have...and those small numbers, egads...Nada..I thought for sure I would have one...but as with radios...a million parts, but never the one you need...I did try for ya...
::
:
: Thanks Cindy, I'm going through Mouser catalog now, found plenty fit electrical specs but configuration is a problem. They have them in all shapes and sizes. PL
:
marv
::KBP series was made by General Instrument. It contains 4 diodes of the 1N4004 type. You can make your own if you can solder the diodes together in a tight group to fit in the space.
::
::I would use 400 V diodes. It's only a 120V application, but sparking from the brushes can cause voltage spikes that can kill lower voltage rectifiers.
::
::You may want to check your brushes and commutator, as brush problems may have killed the rectifier.
::
::I'd say Dremel did a great job to make a good tool that lasted a long time. They also chose the right rating on the diode bridge.
::
::Rich
::
::
::
:::::Thank you all. Warren was right the signs indicated the plus and minus leads and the AC are the two center leads. Will check that NTE unit. Size does matter as there is a holder formed in the plastic case where it rests. If too big will be in the way.
:::::The label of unit says .9 Amp so 2 Amp should work fine and voltage is obviously 120AC so that ok too.Thanks one and all. PL
:::::
:::::
:::::
:::::
::::::I did the very same thing to my air compressor when it's full wave rect blew and I gotta say...it worx...:While this is not strictly radio related I am in need of help on a SS full rectifier that wasat work in my ancient Drummel tool. It has to be 20-30 years and has been agreat tool that now can not be replaced. What Drummel did to that tool is shameful. The other nite puff smoke, shut it down and upon opening it up found a solid state full wave rectifier had burnt out. I put an ohm meter across bushes and rotated shaft and found pretty steady 18 ohms all around. Side of SS rectifier blown out. Unit has KBP 04-1 on side and a squarish design that may be manufactures logo but I dont recognize it. Diamensions are 3/4" wide, 1/2" high and 1/4" deep. four terminals on bottom, outsides are = - and inside two AC. Anyone any ideas? Sioze is important as this nests in housing. PL
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::::::
:::::
:::::Planigan, I have checked all that I have...and those small numbers, egads...Nada..I thought for sure I would have one...but as with radios...a million parts, but never the one you need...I did try for ya...
::::
:::
::: Thanks Cindy, I'm going through Mouser catalog now, found plenty fit electrical specs but configuration is a problem. They have them in all shapes and sizes. PL
:::
::
::
:Hmmmmmm........
:Memory, memory. It seems I worked on a tool of some sort for my neighbor years ago, and while I don't remember what kind of tool it was, it had a permanant magnet field, and a big rectifier bridge to make DC for the armature. In other words, this thing was a PM field DC motor that ran on AC. Maybe you could check and see if you could use an external rectifier for the DC for the armature, maybe an external box or something if you can't find a small bridge. If I remember correctly, the rectifier burned up because the armature burned up first, and I couldn't fix it, but I'm pretty sure that the AC was rectified and went straight to the brushes. (After the power switch, of course)
:
:I've had 2 (not Dremel) but another well known brand, and yes they are DC motors. Once I discovered it was a DC motor, installed a reversing switch for special uses. Only lasted 3-4 yrs, 'til bearings went south. #2 is still doing fine after e few years, but didn't transfer the reverse switch to it. Those integrated bridge rectifiers come in several sizes and configs ie; surface mount, dual in-line, depending on the current rating, but 4 discrete diodes will require more space.
:
:marv
:
:::KBP series was made by General Instrument. It contains 4 diodes of the 1N4004 type. You can make your own if you can solder the diodes together in a tight group to fit in the space.
:::
:::I would use 400 V diodes. It's only a 120V application, but sparking from the brushes can cause voltage spikes that can kill lower voltage rectifiers.
:::
:::You may want to check your brushes and commutator, as brush problems may have killed the rectifier.
:::
:::I'd say Dremel did a great job to make a good tool that lasted a long time. They also chose the right rating on the diode bridge.
:::
:::Rich
:::
:::
:::
::::::Thank you all. Warren was right the signs indicated the plus and minus leads and the AC are the two center leads. Will check that NTE unit. Size does matter as there is a holder formed in the plastic case where it rests. If too big will be in the way.
::::::The label of unit says .9 Amp so 2 Amp should work fine and voltage is obviously 120AC so that ok too.Thanks one and all. PL
::::::
::::::
::::::
::::::
:::::::I did the very same thing to my air compressor when it's full wave rect blew and I gotta say...it worx...:While this is not strictly radio related I am in need of help on a SS full rectifier that wasat work in my ancient Drummel tool. It has to be 20-30 years and has been agreat tool that now can not be replaced. What Drummel did to that tool is shameful. The other nite puff smoke, shut it down and upon opening it up found a solid state full wave rectifier had burnt out. I put an ohm meter across bushes and rotated shaft and found pretty steady 18 ohms all around. Side of SS rectifier blown out. Unit has KBP 04-1 on side and a squarish design that may be manufactures logo but I dont recognize it. Diamensions are 3/4" wide, 1/2" high and 1/4" deep. four terminals on bottom, outsides are = - and inside two AC. Anyone any ideas? Sioze is important as this nests in housing. PL
::::::::
:::::::
:::::::
::::::
::::::Planigan, I have checked all that I have...and those small numbers, egads...Nada..I thought for sure I would have one...but as with radios...a million parts, but never the one you need...I did try for ya...
:::::
::::
:::: Thanks Cindy, I'm going through Mouser catalog now, found plenty fit electrical specs but configuration is a problem. They have them in all shapes and sizes. PL
::::
:::
:::
::Hmmmmmm........
::Memory, memory. It seems I worked on a tool of some sort for my neighbor years ago, and while I don't remember what kind of tool it was, it had a permanant magnet field, and a big rectifier bridge to make DC for the armature. In other words, this thing was a PM field DC motor that ran on AC. Maybe you could check and see if you could use an external rectifier for the DC for the armature, maybe an external box or something if you can't find a small bridge. If I remember correctly, the rectifier burned up because the armature burned up first, and I couldn't fix it, but I'm pretty sure that the AC was rectified and went straight to the brushes. (After the power switch, of course)
::
:
: