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| 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. |
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#1
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General Radio 1604-B ?
Had one follow me home from the local hamfest. It's a Comparison Bridge
with a 2" scope from the mid 50s. Neat looking box. Anyone got any info, manual or what its primary application was/is? pic posted to http://s97.photobucket.com/albums/l237/wd5jfr/ Thanks Hank wd5jfr |
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#2
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General Radio 1604-B ?
Henry Kolesnik wrote in message
... Had one follow me home from the local hamfest. It's a Comparison Bridge with a 2" scope from the mid 50s. Neat looking box. Anyone got any info, manual or what its primary application was/is? pic posted to http://s97.photobucket.com/albums/l237/wd5jfr/ Thanks Hank wd5jfr For googling, the words Genrad or Quadtech maybe useful but probably later useage than yours -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
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#3
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General Radio 1604-B ?
Henry Kolesnik wrote:
Had one follow me home from the local hamfest. It's a Comparison Bridge with a 2" scope from the mid 50s. Neat looking box. Anyone got any info, manual or what its primary application was/is? pic posted to http://s97.photobucket.com/albums/l237/wd5jfr/ Thanks Hank wd5jfr Since no one else has suggested; join the 'GenRad' Yahoo group (mailing list is ); members have provided manuals and schematics for most everything General Radio and the discussion is of a high caliber. Michael |
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#4
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General Radio 1604-B ?
"Henry Kolesnik" wrote in news:7Hjvl.14832
: Had one follow me home from the local hamfest. It's a Comparison Bridge with a 2" scope from the mid 50s. Neat looking box. Anyone got any info, manual or what its primary application was/is? pic posted to http://s97.photobucket.com/albums/l237/wd5jfr/ Thanks Hank wd5jfr I used somewhat similar bridges in the 60's and 70's to measure capacitance. In brief you have device for measuring capacitors and inductors. You put a known device on the left, an unknown device on the right and adjust for minimum signal on the scope. The bridge is 'balanced' when you do this. You combine the known value and the setting made to balance the bridge and you now know the value of the unknown. See http://www.ietlabs.com/pdf/GenRad_1973_Catalog.pdf -- bz 73 de N5BZ k please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. remove ch100-5 to avoid spam trap |
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