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- 04:47, 3 August 2024 UX-281 (hist | edit) [170 bytes] Jerry (talk | contribs) (Created page with "Type '''UX-281 Rectifier Tube for 548-A'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Stroboscopes Category:Parts and Accessories")
- 04:46, 3 August 2024 FG-17 (hist | edit) [123 bytes] Jerry (talk | contribs) (Created page with "Type '''Thyratron for 548-A'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Stroboscopes")
- 04:44, 3 August 2024 635-P1 (hist | edit) [140 bytes] Jerry (talk | contribs) (Created page with "Type '''635-P1 Cathode-Ray Tube'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Recorders and Dial Drives")
- 04:43, 3 August 2024 635-A (hist | edit) [144 bytes] Jerry (talk | contribs) (Created page with "Type '''635-A Electron Oscillograph'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Recorders and Dial Drives")
- 04:40, 3 August 2024 632-A (hist | edit) [164 bytes] Jerry (talk | contribs) (Created page with "Type '''632-A Capacitance Bridge for Electrolytic Condensers'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Impedance measurement")
- 04:38, 3 August 2024 581-B (hist | edit) [153 bytes] Jerry (talk | contribs) (Created page with "Type '''581-B Frequency-Deviation Meter'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Frequency Standards and Meters")
- 04:36, 3 August 2024 580-A (hist | edit) [148 bytes] Jerry (talk | contribs) (Created page with "Type '''580-A Power-Supply Unit for 528'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Recorders and Dial Drives")
- 04:35, 3 August 2024 579-A (hist | edit) [156 bytes] Jerry (talk | contribs) (Created page with "Type '''579-A Cathode-Ray Tube Mounting for 528'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Recorders and Dial Drives")
- 04:33, 3 August 2024 572-A (hist | edit) [136 bytes] Jerry (talk | contribs) (Created page with "Type '''572-A Microphone Hummer'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Parts and Accessories")
- 04:32, 3 August 2024 549-P1 (hist | edit) [120 bytes] Jerry (talk | contribs) (Created page with "Type '''549-P1 Contactor'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Stroboscopes")
- 04:30, 3 August 2024 531-A (hist | edit) [141 bytes] Jerry (talk | contribs) (Created page with "Type '''531-A Power Supply for 575-D'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Parts and Accessories")
- 04:26, 3 August 2024 528-A (hist | edit) [143 bytes] Jerry (talk | contribs) (Created page with "Type '''528-A Cathode Ray Tube 528'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Recorders and Dial Drives")
- 04:25, 3 August 2024 143-D (hist | edit) [148 bytes] Jerry (talk | contribs) (Created page with "Type '''143-D Rectifier Tube 528 System'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Recorders and Dial Drives")
- 04:02, 3 August 2024 505-Q (hist | edit) [1,203 bytes] Peter (talk | contribs) (Created page with "{{GR Product |model=505-Q |codes=CONDENJACK |class=capacitance standards |summary=50nF, 1% standard capacitor |image=Photo Needed.jpg |caption=Genrad 505-Q |series=505 |introduced=1934 |discontinued=1934 |designers= |manuals= {{Catalog History}} }} The {{Title|General Radio 505-Q}} is a 50 nF, 1% standard capacitor that only appeared in {{Catalog G2}}. After that, the large-case 505-R was GR's 50 nF offering in the 505 series. See the overview page 505 for the...")
- 18:20, 1 August 2024 106 (hist | edit) [143 bytes] Jerry (talk | contribs) (Created page with "Type '''106 Series of Standard Inductors'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Inductance Standards")
- 19:18, 25 July 2024 Donald B. Sinclair (hist | edit) [3,287 bytes] Peter (talk | contribs) (Created page with "{{Person |Names=Donald Bellamy Sinclair |Birth date=1910-05-23 |Birth place=Winnipeg, Man., Canada. |Death date=1985-08-24 |Death place= |Countries=Canada, US |Affiliations=University of Manitoba, MIT, New York Telephone Company, Bell Telephone Laboratories, Western Electric, General Radio |Wikidata id=Q22018784 }} joined General Radio as an engineer in July 1936. He held numerous engineering and management positions, including those of chief engineer (1950 to 1960) and...")
- 19:07, 25 July 2024 Arnold P. G. Peterson (hist | edit) [798 bytes] Peter (talk | contribs) (Created page with "{{Person |Names=Arnold P. G. Peterson |Birth date=1914-08-07 |Birth place=DeKalb, IL, US |Death date= |Death place= |Countries= |Affiliations=University of Toledo; MIT; General Radio |Wikidata id= }} ''please add biography'' [https://www.worldradiohistory.com/Archive-IRE/60s/IRE-Directory-1960-Members.pdf IRE Directory 1960]: :PETERSON, Arnold P. G. (S'34-A'38-SM'46-F'58), Engineer, General Radio Company, 22 Baker Ave., West Concord, Mass. :Born: August 7, 1914, DeKal...")
- 07:22, 23 July 2024 KNB-4GY (hist | edit) [1,084 bytes] Jerry (talk | contribs) (Created page with "{{GR Product |model=KNB-4GY |codes= |class=parts and accessories |summary=Fluted Knob |image=GR KNB-4GY Close-Up |caption=General Radio KNB-4GY Fluted Knob |series=KN |introduced=? |discontinued=? |designers= |manuals= * '''Manual Needed.''' {{Catalog History}} }} The {{Title|General Radio KNB-4GY Fluted Knob}} was not available in any catalog. The Type KNB-4GY is a fluted double bar type knob with skirt diameter of 1-1/2". It accepts both 3/8" and 1/4" shafts using a...")
- 08:16, 21 July 2024 637 (hist | edit) [138 bytes] Jerry (talk | contribs) (Created page with "Type '''637 Series of fluted knobs'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Parts and Accessories")
- 07:54, 21 July 2024 KN (hist | edit) [5,118 bytes] Jerry (talk | contribs) (Created page with "{{GR Product |model=KN |codes= |class=parts and accessories |summary=Fluted Knobs |image=GR KN Fluted Knob Front.jpg |caption=General Radio KN Fluted Knobs |series=KN |introduced=1948 |discontinued=1965 |designers= |manuals= * '''Manual Needed.''' {{Catalog History}} }} The {{Title|General Radio KN Fluted Knobs}} was introduced in {{Catalog L}} and remained available through {{Catalog S}}. The Type KN series of fluted knobs are designed to replace the Type 637 seri...")
- 20:40, 12 July 2024 1921-P1 (hist | edit) [133 bytes] Jerry (talk | contribs) (Created page with "Type '''1921-P1 Storage Display Unit'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Wave Analyzer")
- 20:14, 12 July 2024 938-BG (hist | edit) [167 bytes] Jerry (talk | contribs) (Created page with "Type '''938-BR Gray Plastic Insulating Panel Interlocks (Pair)'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Parts and Accessories")
- 02:34, 19 June 2024 1409 (hist | edit) [3,393 bytes] Jerry (talk | contribs) (Created page with "Type '''1409 Series of Standard Capacitors'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Capacitance Standards")
- 05:27, 18 June 2024 1687B (hist | edit) [1,248 bytes] Jerry (talk | contribs) (Created page with "{{GR Product |model=1687B |codes= |class=impedance measurement |summary=Megahertz LC Digibridge |image=GR 1687-B Close-Up.jpg |caption=GenRad 1687B Megahertz LC Digibridge |series= |introduced=? |discontinued=? |designers= |manuals= * '''Manual Needed.''' * GenRad 1687B Megahertz LC Digibridge Quick Reference {{Catalog History}} }} The {{Title|GenRad 1687B Megahertz LC Digibridge}} introduction is unknown at this ti...")
- 20:15, 17 June 2024 1640-A (hist | edit) [169 bytes] Jerry (talk | contribs) (Created page with "Type '''1640-A Precision Slotted Line Recording System'''. ==Specifications== ==Links== <gallery> </gallery> Category:Coaxial Elements Category:900 Precision")
- 19:13, 6 June 2024 1685-P1 (hist | edit) [1,333 bytes] Jerry (talk | contribs) (Created page with "{{GR Product |model=1685-P1 |codes=1685-9600 |class=impedance measurement |summary=Test Fixture |image=GR 1685-9600 Front.jpg |caption=General Radio 1685-P1 Test Fixture |series=1685 |introduced=1978 |discontinued=1978+ |designers= |manuals= * General Radio 1685 Digital Impeance Meter 1685-0150-A 1975 {{Catalog History}} }} The {{Title|General Radio 1685-P1 Test Fixture}} was available in {{Catalog 1978}}...")
- 19:34, 28 May 2024 Butterfly circuit (hist | edit) [1,152 bytes] Peter (talk | contribs) (Created page with "In the words of the patent application, <blockquote> The principal object of the present invention is to provide ultra-high-frequency tuning apparatus which is readily tunable over a wide frequency range, and which avoids the difficulties of erratic operation encountered in some existing resonant circuit controls. </blockquote> The arrangement consist of a butterfly-type capacitor (two sets of stator plates with a butterfly-shaped rotor that needs no electrical connect...")
- 17:35, 24 May 2024 774 (hist | edit) [818 bytes] Peter (talk | contribs) (Created page with "{{Title|General Radio 774 series connectors}} were coaxial connectors used on many GR instruments from their introduction in 1941 until they were was supplanted by the Type 874 in 1948. The 774 was a constant-impedance connector was used for generator and detector connections of two of the first instruments using it - the Type 821-A Twin-T Impedance Measuring Circuit, and the Type 916-A Radio-Frequency Bridge. ''to be expanded'' ==GR-77...")
- 20:57, 20 May 2024 1192-Z (hist | edit) [1,400 bytes] Jerry (talk | contribs) (Created page with "Type '''1192-Z Counter-Scaler Combination'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Frequency Standards and Meters")
- 17:33, 19 May 2024 980 (hist | edit) [3,534 bytes] Jerry (talk | contribs) (Created page with "Type '''980 Series of Decade Capacitor Units'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Capacitance Standards")