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
|
|||
|
|||
Replacing Tektronix 465 range bulb
Hello, The range bulb(s) 1x/10x (ch1) appears to be burned out. It looks like it is well buried under the switch. How much pain is it replace it and where can I get one. I might be tempted to replace it with LED and a resistor if I can get to it. Is that one bulb that has its light output steered or are there two? None of the pertinent positions on that channel light up. -- Boris Mohar |
#2
Posted to sci.electronics.repair
|
|||
|
|||
Replacing Tektronix 465 range bulb
Boris Mohar wrote in
: Hello, The range bulb(s) 1x/10x (ch1) appears to be burned out. It looks like it is well buried under the switch. How much pain is it replace it and where can I get one. I might be tempted to replace it with LED and a resistor if I can get to it. Is that one bulb that has its light output steered or are there two? None of the pertinent positions on that channel light up. you have to remove the vertical preamp board and attenuators to access those TWO lamps,a PITA. I definitely would consider LEDs and resistor in place of the lamps.I think you could get away with one resistor for both LEDs. the original lamps had 50K hour lifetimes. -- Jim Yanik jyanik at kua.net |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Replacing Tektronix 465 range bulb
On 7 Aug 2007 14:10:57 GMT, Jim Yanik wrote:
Boris Mohar wrote in : Hello, The range bulb(s) 1x/10x (ch1) appears to be burned out. It looks like it is well buried under the switch. How much pain is it replace it and where can I get one. I might be tempted to replace it with LED and a resistor if I can get to it. Is that one bulb that has its light output steered or are there two? None of the pertinent positions on that channel light up. you have to remove the vertical preamp board and attenuators to access those TWO lamps,a PITA. I definitely would consider LEDs and resistor in place of the lamps.I think you could get away with one resistor for both LEDs. the original lamps had 50K hour lifetimes. I think that you talked me out of it. Thanks. BTW I just finished repairing the 307 modules. http://www.sphere.bc.ca/test/tek-parts/tekpots.html At first I thought that it was the socket but it turned out that the pins become intermittent at the ceramic substrate solder junction. The gain and the frequency response was all over the place. I unplugged them, removed the lids and resoldered the pins from inside. I used some rather aggressive water soluble flux because rosin flux just would not work wit those pins. Washed them out with lots of water. It is rock steady now. -- Boris |
#4
Posted to sci.electronics.repair
|
|||
|
|||
Replacing Tektronix 465 range bulb
Boris Mohar wrote in
: On 7 Aug 2007 14:10:57 GMT, Jim Yanik wrote: Boris Mohar wrote in m: Hello, The range bulb(s) 1x/10x (ch1) appears to be burned out. It looks like it is well buried under the switch. How much pain is it replace it and where can I get one. I might be tempted to replace it with LED and a resistor if I can get to it. Is that one bulb that has its light output steered or are there two? None of the pertinent positions on that channel light up. you have to remove the vertical preamp board and attenuators to access those TWO lamps,a PITA. I definitely would consider LEDs and resistor in place of the lamps.I think you could get away with one resistor for both LEDs. the original lamps had 50K hour lifetimes. I think that you talked me out of it. Thanks. I got pretty good at it while at TEK. I got to know what screws and shields to remove,and had a flex nutdriver for the nuts bolting the attenuator frame to the front casting. Of course,I didn't have the option of skipping the job... 8-) BTW I just finished repairing the 307 modules. http://www.sphere.bc.ca/test/tek-parts/tekpots.html At first I thought that it was the socket but it turned out that the pins become intermittent at the ceramic substrate solder junction. The gain and the frequency response was all over the place. I unplugged them, removed the lids and resoldered the pins from inside. I used some rather aggressive water soluble flux because rosin flux just would not work wit those pins. Washed them out with lots of water. It is rock steady now. -- Boris Amazing that you could solder them at all,the plating/tinning on those ceramic substrates always seemed to vaporize under soldering heat. did you use ordinary solder,63/37? -- Jim Yanik jyanik at kua.net |
#5
Posted to sci.electronics.repair
|
|||
|
|||
Replacing Tektronix 465 range bulb
On 8 Aug 2007 00:11:47 GMT, Jim Yanik wrote:
Boris Mohar wrote in : On 7 Aug 2007 14:10:57 GMT, Jim Yanik wrote: Boris Mohar wrote in : Hello, The range bulb(s) 1x/10x (ch1) appears to be burned out. It looks like it is well buried under the switch. How much pain is it replace it and where can I get one. I might be tempted to replace it with LED and a resistor if I can get to it. Is that one bulb that has its light output steered or are there two? None of the pertinent positions on that channel light up. you have to remove the vertical preamp board and attenuators to access those TWO lamps,a PITA. I definitely would consider LEDs and resistor in place of the lamps.I think you could get away with one resistor for both LEDs. the original lamps had 50K hour lifetimes. I think that you talked me out of it. Thanks. I got pretty good at it while at TEK. I got to know what screws and shields to remove,and had a flex nutdriver for the nuts bolting the attenuator frame to the front casting. Of course,I didn't have the option of skipping the job... 8-) BTW I just finished repairing the 307 modules. http://www.sphere.bc.ca/test/tek-parts/tekpots.html At first I thought that it was the socket but it turned out that the pins become intermittent at the ceramic substrate solder junction. The gain and the frequency response was all over the place. I unplugged them, removed the lids and resoldered the pins from inside. I used some rather aggressive water soluble flux because rosin flux just would not work wit those pins. Washed them out with lots of water. It is rock steady now. -- Boris Amazing that you could solder them at all,the plating/tinning on those ceramic substrates always seemed to vaporize under soldering heat. did you use ordinary solder,63/37? I used 0.015" Kester 63/37 that contains organic water soluble flux. The flux is more aggressive that rosin flux. It is also conductive so everything has to be washed thoroughly. Having a Metcal soldering iron wit a tiny tip and stereo microscope made things rather easy. Time will tell. -- Boris |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Replacing an old drop-in range (GE) | Home Repair | |||
replacing bulb in a Panasonic Microwave Oven Model NN-T990SA | Electronics Repair | |||
Problem Replacing Range | Home Repair | |||
Replacing A LCD projector bulb with alternative | Electronics Repair | |||
A fluorescent bulb; replacing an incandescent. | Home Repair |