Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
Hey-
I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry |
#2
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
In article . com,
KAOS wrote: Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry If they're the things I'm visualizing from your description, one name for them is "hollow turret terminals." |
#3
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
KAOS wrote in message
ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry Could you post a pic to some hosting site, or at least some dimensions, as I don't recognise the description -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#4
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
"N Cook" wrote in message ... KAOS wrote in message ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry Could you post a pic to some hosting site, or at least some dimensions, as I don't recognise the description I've seen these on manufactured boards many times, but I can't recall seeing them sold anywhere. Smitty's name for them sounds right. You can also get ceramic tubes for the same purpose, and I think the word 'standoff' comes into them somewhere. Another method of standing power resistors off the board in a mechanically robust way, is to use ceramic fishspines. You can put as many as you like of those on each leg, to space it off as far as you like. Once the resistor is pulled into the board, and soldered, they are very rigid. Arfa |
#5
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
Arfa Daily wrote in message
... "N Cook" wrote in message ... KAOS wrote in message ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry Could you post a pic to some hosting site, or at least some dimensions, as I don't recognise the description I've seen these on manufactured boards many times, but I can't recall seeing them sold anywhere. Smitty's name for them sounds right. You can also get ceramic tubes for the same purpose, and I think the word 'standoff' comes into them somewhere. Another method of standing power resistors off the board in a mechanically robust way, is to use ceramic fishspines. You can put as many as you like of those on each leg, to space it off as far as you like. Once the resistor is pulled into the board, and soldered, they are very rigid. Arfa But you don't want rigid, in the sense of clamped down to board fixing, or board flexure + lead heating will lead to strain on the solder points, then failure of joints -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#6
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
"N Cook" wrote in message ... Arfa Daily wrote in message ... "N Cook" wrote in message ... KAOS wrote in message ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry Could you post a pic to some hosting site, or at least some dimensions, as I don't recognise the description I've seen these on manufactured boards many times, but I can't recall seeing them sold anywhere. Smitty's name for them sounds right. You can also get ceramic tubes for the same purpose, and I think the word 'standoff' comes into them somewhere. Another method of standing power resistors off the board in a mechanically robust way, is to use ceramic fishspines. You can put as many as you like of those on each leg, to space it off as far as you like. Once the resistor is pulled into the board, and soldered, they are very rigid. Arfa But you don't want rigid, in the sense of clamped down to board fixing, or board flexure + lead heating will lead to strain on the solder points, then failure of joints The metal tubes that he is referring to are quite common in TV sets and the like, and I can assure you that they hold the resistors very firmly, and inflexibly, to the board. Failure of the joints on them is not something that I would have said was 'common' ... Arfa |
#7
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
Arfa Daily wrote:
"N Cook" wrote in message ... Arfa Daily wrote in message ... "N Cook" wrote in message ... KAOS wrote in message ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry Could you post a pic to some hosting site, or at least some dimensions, as I don't recognise the description I've seen these on manufactured boards many times, but I can't recall seeing them sold anywhere. Smitty's name for them sounds right. You can also get ceramic tubes for the same purpose, and I think the word 'standoff' comes into them somewhere. Another method of standing power resistors off the board in a mechanically robust way, is to use ceramic fishspines. You can put as many as you like of those on each leg, to space it off as far as you like. Once the resistor is pulled into the board, and soldered, they are very rigid. Arfa But you don't want rigid, in the sense of clamped down to board fixing, or board flexure + lead heating will lead to strain on the solder points, then failure of joints The metal tubes that he is referring to are quite common in TV sets and the like, and I can assure you that they hold the resistors very firmly, and inflexibly, to the board. Failure of the joints on them is not something that I would have said was 'common' ... As I recall, they are called stand-offs or turret lugs. The component lead usually seems to have a bit of movement in the tube, tho only soldered at the board end of the tube. They are used a lot in Peavey amplifiers and rarely seem to fail. see here http://www.turretlugs.co.uk/ Ron(UK) -- Lune Valley Audio Public Address Systems Hire Sales Maintenance www.lunevalleyaudio.com |
#8
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
KAOS wrote:
Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. You need a stainless steel dental pick. Your dentist will probably give you one that is getting dull. Or you can usually find them at flea markets or dollar stores. You heat up the post (in this case) and ram the pick down into the hot solder. The pick pushes the molten solder out, and since the pick is stainless, the solder doesn't stick to it. With a little care, you can also use the pick to clear plated-thru holes on a PCB. Bill |
#9
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
"KAOS" wrote in message
ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry They are called Turret Terminals. Several companies make them, but you can poke around Mouser's current catalog on page 1541. Keystone makes them, even sells a cheap staking kit for installing them to a board. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) "In theory, there isn't any difference between theory and practice. In practice, there is." - Yogi Berra |
#10
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
Thanks for the pointers-
I guess they're turret terminals. The ones I see on Mouser and on the Keystone site are not as tall as these, but one is close. I tried to grab some quick (rough) dimensions- Inner Diameter- 1.2mm Outer Diameter- 2.2mm Base Diameter- 3.2mm height (above board) 9.5mm (.37 in) The ones I've found are skinnier than mine too. They probably don't need replacing- it's just that they got heated up good to remove the solder and now the plating looks funky. As long as they serve their purpose... Here are some snapshots just for reference: http://home.sc.rr.com/kstillin/turret/turret1.JPG http://home.sc.rr.com/kstillin/turret/turret2.JPG http://home.sc.rr.com/kstillin/turret/turret3.JPG One of them shows a thermistor installed. Thanks again- Kerry DaveM wrote: "KAOS" wrote in message ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry They are called Turret Terminals. Several companies make them, but you can poke around Mouser's current catalog on page 1541. Keystone makes them, even sells a cheap staking kit for installing them to a board. -- Dave M |
#11
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
KAOS wrote:
The ones I've found are skinnier than mine too. They probably don't need replacing- it's just that they got heated up good to remove the solder and now the plating looks funky. As long as they serve their purpose... Here are some snapshots just for reference: http://home.sc.rr.com/kstillin/turret/turret1.JPG http://home.sc.rr.com/kstillin/turret/turret2.JPG http://home.sc.rr.com/kstillin/turret/turret3.JPG One of them shows a thermistor installed. They are rolled brass turret lugs/tags/terminals Ron(UK) |
#12
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
Ron(UK) wrote in message
... KAOS wrote: The ones I've found are skinnier than mine too. They probably don't need replacing- it's just that they got heated up good to remove the solder and now the plating looks funky. As long as they serve their purpose... Here are some snapshots just for reference: http://home.sc.rr.com/kstillin/turret/turret1.JPG http://home.sc.rr.com/kstillin/turret/turret2.JPG http://home.sc.rr.com/kstillin/turret/turret3.JPG One of them shows a thermistor installed. They are rolled brass turret lugs/tags/terminals Ron(UK) Now seeing a pic they are familiar but no names known to me. I've always known turret tags as the crenelated/castellated (as found on castle turrets) small tags pressed into paxolin circuit board of valve and wire-ended component days and Gardner etc high quality transformers for lead terminations. Looking down on the top they have a cross recess for taking wires in 2/4 directions. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
#13
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
In article .com,
KAOS wrote: Thanks for the pointers- I guess they're turret terminals. The ones I see on Mouser and on the Keystone site are not as tall as these, but one is close. I tried to grab some quick (rough) dimensions- Inner Diameter- 1.2mm Outer Diameter- 2.2mm Base Diameter- 3.2mm height (above board) 9.5mm (.37 in) The ones I've found are skinnier than mine too. They probably don't need replacing- it's just that they got heated up good to remove the solder and now the plating looks funky. As long as they serve their purpose... Here are some snapshots just for reference: http://home.sc.rr.com/kstillin/turret/turret1.JPG http://home.sc.rr.com/kstillin/turret/turret2.JPG http://home.sc.rr.com/kstillin/turret/turret3.JPG One of them shows a thermistor installed. Thanks again- Kerry I've destroyed many a PCB by trying to replace terminals. They're mechanically swaged into the board prior to soldering. They *can* be successfully replaced; I've done that, too. But it's just as likely that you'll tear up pads and traces. Your pics show a single sided board which would make replacement a lot easier if you decide to do it. |
#14
Posted to sci.electronics.repair
|
|||
|
|||
power resistor solder post (in search of)
KAOS wrote in message
ups.com... Hey- I'm looking for some of these posts that you find cement power resistors mounted to on PCBs. They're little hollow posts that are inserted through the bottom of the PCB that allow the leads of the power resistor to feed through and solder to the bottom. I assume they're designed to sink a little heat and allow the resistor to be mounted sturdily above the board level. Anyway, I (always) have trouble heating them up and removing all the solder to install new resistors. Anyone know what these are called, so I can poke around on mouser or elsewhere for replacements? Thanks for any assistance- Kerry I was recently repairing a 30 yearold amp and those pins look very much like the electrical socket type connectors fitted bare, directly to pcbs to mate with line plugs of the Molex / QM type connector range, in UK terms. As far as the bellied/swaged ends to solder onto the board, very similar, the active connector ends are more open than the sort for thin leaded Rs , but could be used for R standoff/pillars -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
how do I solder a power switch to a mobile board | Electronics Repair | |||
[OT] Power Resistor of Justice | UK diy | |||
Resistor [R8] on Zhinan ZN-1792 Power Supply | Electronics Repair | |||
Power Supply Resistor | Electronics Repair |