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Tips on repairing the stick attenuator in the HP86603A

Jeff Kruth All Messages By This Member #92750 Hi All! Dont ask why, but I am resurrecting several HP 8660D generators with the HP86603A plugin. The attenuators are "sticky", get stuck in a certain position. If you have experience with this exact type of stick attenuator (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can advise how to make a reliable repair, I would love to hear about it. Several that I cleaned the solenoid shafts on seemed to be working only to stick again. I do not know how to search the archives as well, can someone advise? Thanks! 73 Jeff Kruth
Dan Rae All Messages By This Member #92752 开云体育 On 11/20/2018 1:48 PM, Jeff Kruth via Groups.Io wrote: Hi All! Dont ask why, but I am resurrecting several HP 8660D generators with the HP86603A plugin. The attenuators are "sticky", get stuck in a certain position. If you have experience with this exact type of stick attenuator (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can advise how to make a reliable repair, I would love to hear about it. Several that I cleaned the solenoid shafts on seemed to be working only to stick again. I do not know how to search the archives as well, can someone advise? Sounds like the universal problem of decaying O-rings Jeff.? They are easier to replace than source. Dan
Bo Lowrey W4FCL All Messages By This Member #92753 Hey Jeff. Have you measured one to check the size? I have several sources that might be able to supply them - 73, Bo L. toggle quoted message Show quoted text On 11/20/18, Jeff Kruth via Groups.Io <kmec@...> wrote: Hi All! Dont ask why, but I am resurrecting several HP 8660D generators with the HP86603A plugin. The attenuators are "sticky", get stuck in a certain position. If you have experience with this exact type of stick attenuator (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can advise how to make a reliable repair, I would love to hear about it. Several that I cleaned the solenoid shafts on seemed to be working only to stick again. I do not know how to search the archives as well, can someone advise?Thanks!73Jeff Kruth
Glenn Little All Messages By This Member #92754 Here is a video on repairing one of these attenuators: The O-Rings are 2mm od x 1 mm id x 0.5mm thick. Theses are used in watch making. Hope this helps Glenn toggle quoted message Show quoted text On 11/20/2018 6:31 PM, g lowrey wrote: Hey Jeff. Have you measured one to check the size? I have several sources that might be able to supply them - 73, Bo L. On 11/20/18, Jeff Kruth via Groups.Io <kmec@...> wrote: Hi All! Dont ask why, but I am resurrecting several HP 8660D generators with the HP86603A plugin. The attenuators are "sticky", get stuck in a certain position. If you have experience with this exact type of stick attenuator (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can advise how to make a reliable repair, I would love to hear about it. Several that I cleaned the solenoid shafts on seemed to be working only to stick again. I do not know how to search the archives as well, can someone advise?Thanks!73Jeff Kruth -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license"
George Onufer All Messages By This Member #92755 开云体育 I have never failed to locate a needed o-ring at Mcmaster Carr.? Google their catalog. Sent from my T-Mobile 4G LTE Device
Jeff Kruth All Messages By This Member #92763 NOT O Rings. Different design than the small flat guys. In a message dated 11/20/2018 5:32:51 PM Eastern Standard Time, danrae@... writes: On 11/20/2018 1:48 PM, Jeff Kruth via Groups.Io wrote: Hi All! Dont ask why, but I am resurrecting several HP 8660D generators with the HP86603A plugin. The attenuators are "sticky", get stuck in a certain position. If you have experience with this exact type of stick attenuator (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can advise how to make a reliable repair, I would love to hear about it. Several that I cleaned the solenoid shafts on seemed to be working only to stick again. I do not know how to search the archives as well, can someone advise? Sounds like the universal problem of decaying O-rings Jeff.? They are easier to replace than source. Dan
Jeff Kruth All Messages By This Member #92764 I had asked if anyone was familiar with this type of atten. NOT the 8495 style, but a long stick. I guess no one reads. NO O rings. Jeff In a message dated 11/20/2018 7:02:42 PM Eastern Standard Time, glennmaillist@... writes: Here is a video on repairing one of these attenuators: The O-Rings are 2mm od x 1 mm id x 0.5mm thick. Theses are used in watch making. Hope this helps Glenn toggle quoted message Show quoted text On 11/20/2018 6:31 PM, g lowrey wrote: > Hey Jeff. Have you measured one to check the size? I have several > sources that might be able to supply them - > 73, > Bo L. > > On 11/20/18, Jeff Kruth via Groups.Io <kmec=[email protected]> wrote: >> Hi All! >> Dont ask why, but I am resurrecting several HP 8660D generators with the >> HP86603A plugin. The attenuators are "sticky", get stuck in a certain >> position. If you have experience with this exact type of stick attenuator >> (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can >> advise how to make a reliable repair, I would love to hear about it. Several >> that I cleaned the solenoid shafts on seemed to be working only to stick >> again. I do not know how to search the archives as well, can someone >> advise?Thanks!73Jeff Kruth >> >> >> >> > > > -- ----------------------------------------------------------------------- Glenn Little? ? ? ? ? ? ? ? ARRL Technical Specialist? QCWA? LM 28417 Amateur Callsign:? WB4UIV? ? ? ? ? ? wb4uiv@...? ? AMSAT LM 2178 QTH:? Goose Creek, SC USA (EM92xx)? USSVI LM? NRA LM? SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license"
Glenn Little All Messages By This Member #92766 开云体育 I guess a part number for the attenuator in question would help. Everyone does not have 86603A manuals to check the part number. The o-ring failures are quite common. The attenuators with o-rings are used in a number of instruments. Without the attenuator part number, who would know that your attenuator is of a different design. Glenn On 11/21/2018 10:13 AM, Jeff Kruth via Groups.Io wrote: I had asked if anyone was familiar with this type of atten. NOT the 8495 style, but a long stick. I guess no one reads. NO O rings. Jeff In a message dated 11/20/2018 7:02:42 PM Eastern Standard Time, glennmaillist@... writes: Here is a video on repairing one of these attenuators: The O-Rings are 2mm od x 1 mm id x 0.5mm thick. Theses are used in watch making. Hope this helps Glenn On 11/20/2018 6:31 PM, g lowrey wrote: > Hey Jeff. Have you measured one to check the size? I have several > sources that might be able to supply them - > 73, > Bo L. > > On 11/20/18, Jeff Kruth via Groups.Io <kmec=[email protected]> wrote: >> Hi All! >> Dont ask why, but I am resurrecting several HP 8660D generators with the >> HP86603A plugin. The attenuators are "sticky", get stuck in a certain >> position. If you have experience with this exact type of stick attenuator >> (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can >> advise how to make a reliable repair, I would love to hear about it. Several >> that I cleaned the solenoid shafts on seemed to be working only to stick >> again. I do not know how to search the archives as well, can someone >> advise?Thanks!73Jeff Kruth >> >> >> >> > > > -- ----------------------------------------------------------------------- Glenn Little? ? ? ? ? ? ? ? ARRL Technical Specialist? QCWA? LM 28417 Amateur Callsign:? WB4UIV? ? ? ? ? ? wb4uiv@...? ? AMSAT LM 2178 QTH:? Goose Creek, SC USA (EM92xx)? USSVI LM? NRA LM? SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license"
Daun Yeagley All Messages By This Member #92769 开云体育 Perhaps a picture would be useful too. Daun Daun E. Yeagley II, N8ASB On 11/21/2018 12:19 PM, Glenn Little wrote: toggle quoted message Show quoted text I guess a part number for the attenuator in question would help. Everyone does not have 86603A manuals to check the part number. The o-ring failures are quite common. The attenuators with o-rings are used in a number of instruments. Without the attenuator part number, who would know that your attenuator is of a different design. Glenn On 11/21/2018 10:13 AM, Jeff Kruth via Groups.Io wrote: I had asked if anyone was familiar with this type of atten. NOT the 8495 style, but a long stick. I guess no one reads. NO O rings. Jeff In a message dated 11/20/2018 7:02:42 PM Eastern Standard Time, glennmaillist@... writes: Here is a video on repairing one of these attenuators: The O-Rings are 2mm od x 1 mm id x 0.5mm thick. Theses are used in watch making. Hope this helps Glenn On 11/20/2018 6:31 PM, g lowrey wrote: > Hey Jeff. Have you measured one to check the size? I have several > sources that might be able to supply them - > 73, > Bo L. > > On 11/20/18, Jeff Kruth via Groups.Io <kmec=[email protected]> wrote: >> Hi All! >> Dont ask why, but I am resurrecting several HP 8660D generators with the >> HP86603A plugin. The attenuators are "sticky", get stuck in a certain >> position. If you have experience with this exact type of stick attenuator >> (long silver block) with the 3 - 40 dB, 20 dB, & 10 dB sections and can >> advise how to make a reliable repair, I would love to hear about it. Several >> that I cleaned the solenoid shafts on seemed to be working only to stick >> again. I do not know how to search the archives as well, can someone >> advise?Thanks!73Jeff Kruth >> >> >> >> > > > -- ----------------------------------------------------------------------- Glenn Little? ? ? ? ? ? ? ? ARRL Technical Specialist? QCWA? LM 28417 Amateur Callsign:? WB4UIV? ? ? ? ? ? wb4uiv@...? ? AMSAT LM 2178 QTH:? Goose Creek, SC USA (EM92xx)? USSVI LM? NRA LM? SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license"
Robert G8RPI All Messages By This Member #92770 Part number would be 86603- 60074 Never had to fix on so can't help further Robert G8RPI.

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