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Re: HP 1740A HV Oscillator has stopped running
Yes, you are correct, it is the HV Osc Q1, I was mixed with another section that was giving problems but resolved.
I'll pull it out and test it, I have already done that HV Disable Q1 and Q2. Someone else suggested on another group that Q2 was dicky, despite it checking ok on my tester, it was replaced as I have loads of equivalents but that wasn't the problem.? So I'll try this test and let you now if is OK or not. Graham |
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Re: 1853-0063 transistor needed
Bob Albert
Sorry abpit the NTE214; I must have mixed up the number.? But the info is online. Bob On Saturday, October 21, 2017 1:47 PM, "george g_einst@... [hp_agilent_equipment]" wrote: Electrically equivalent mechanically no, the 1853-0063 is a TO3 device not a TO66 George G6HIG ________________________________________ From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of Dennis Czelusniak czelusniakd@... [hp_agilent_equipment] <hp_agilent_equipment@...>
Sent: 21 October 2017 20:22:48 To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 1853-0063 transistor needed A-1853-0063-1 NTE Equvilent NTE218 TRANSISTOR PNP SILICON 90V IC=4A TO-66 CASE All I did was GOOGLE and that's what it shows as equivalent. Dennis -------------------------------------------- On Sat, 10/21/17, mmaseda@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Subject: [hp_agilent_equipment] 1853-0063 transistor needed To: hp_agilent_equipment@... Date: Saturday, October 21, 2017, 1:25 PM Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C?? I’ve already have a query into Walter at Sphere. Thanks in advance,Manuel ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: ? ? <*> Your email settings: ? ? Individual Email | Traditional <*> To change settings online go to: ? ? ? ? (Yahoo! ID required) <*> To change settings via email: ? ? hp_agilent_equipment-digest@... ? ? hp_agilent_equipment-fullfeatured@... <*> To unsubscribe from this group, send an email to: ? ? hp_agilent_equipment-unsubscribe@... <*> Your use of Yahoo Groups is subject to: ? ? |
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Re: 1853-0063 transistor needed
Electrically equivalent mechanically no, the 1853-0063 is a TO3 device not a TO66
George G6HIG ________________________________________ From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of Dennis Czelusniak czelusniakd@... [hp_agilent_equipment] <hp_agilent_equipment@...> Sent: 21 October 2017 20:22:48 To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] 1853-0063 transistor needed A-1853-0063-1 NTE Equvilent NTE218 TRANSISTOR PNP SILICON 90V IC=4A TO-66 CASE All I did was GOOGLE and that's what it shows as equivalent. Dennis -------------------------------------------- On Sat, 10/21/17, mmaseda@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Subject: [hp_agilent_equipment] 1853-0063 transistor needed To: hp_agilent_equipment@... Date: Saturday, October 21, 2017, 1:25 PM Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C? I’ve already have a query into Walter at Sphere. Thanks in advance,Manuel |
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Re: 1853-0063 transistor needed
Hi Ken
Please read my posting, I said PNP2N3055, yes their is such a device and it is PNP. It was produced as a compliment to the 2N3055. 73 George G6HIG ________________________________________ From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of ken chalfant kpchalfant@... [hp_agilent_equipment] <hp_agilent_equipment@...> Sent: 21 October 2017 19:53 To: hp_agilent_equipment Subject: Re: [hp_agilent_equipment] 1853-0063 transistor needed Greetings, Of course, the world is filled with things I don’t know - but I think the 2N3055 is an NPN transistor. I believe its PNP complement is Mj2955. Don’t just take my word, I may be wrong - double check. Regards, Ken On 21Oct, 2017, at 1:41 PM, george g_einst@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: |
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Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
So the filtered feed to the 12V comes off the cap that also feeds the 20V supply.? I have around 30V coming off that cap into the 12V regulator.? The output of the 12V regulator is only 9.5V. So I guess I can start by replacing the regulator which looks like a job. Thanks for the input. |
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Re: 1853-0063 transistor needed
A-1853-0063-1 NTE Equvilent NTE218 TRANSISTOR PNP SILICON 90V IC=4A TO-66 CASE
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All I did was GOOGLE and that's what it shows as equivalent. Dennis -------------------------------------------- On Sat, 10/21/17, mmaseda@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: [hp_agilent_equipment] 1853-0063 transistor needed To: hp_agilent_equipment@... Date: Saturday, October 21, 2017, 1:25 PM Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C? ?I’ve already have a query into Walter at Sphere. Thanks in advance,Manuel |
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Re: OT Omni Spectra Semi-Rigid Tools
开云体育Dan, I have a nearly complete T-200/500 that I got a couple of years ago. It's on a shelf around here somewhere. At the time I did a bunch of searching and discovered the TE-Connectivity replacement kit. I downloaded the basic instruction sheet and a bunch of files for using the kit for various Omni-Spectra SMA connectors. Let me do some archaeology and see if I can find the files. They may or may not be applicable to your kit, too. Steve
On 10/20/2017 7:23 PM, djn@...
[hp_agilent_equipment] wrote:
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Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
开云体育Check the power supplies and replace the bad filter capacitors.Glenn On 10/21/2017 3:07 PM,
jehancoc@... [hp_agilent_equipment] wrote:
-- ----------------------------------------------------------------------- Glenn Little ETCS(SS) USN Ret, ARRL Technical Specialist, SBE ARRL TAPR Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA LM QCWA LM 28417 "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" --------------------------------------------------------------------------- |
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Re: 1853-0063 transistor needed
Greetings,
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Of course, the world is filled with things I don’t know - but I think the 2N3055 is an NPN transistor. I believe its PNP complement is Mj2955. Don’t just take my word, I may be wrong - double check. Regards, Ken On 21Oct, 2017, at 1:41 PM, george g_einst@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: |
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Re: 1853-0063 transistor needed
Hi Manuel
The transistor is a low spec Si PNP, try 2N2955 or even a PNP2N3055. Spec is Si PNP,55V, 5A, FT 3MHZ in a TO3 case. 73 George G6HIG ________________________________________ From: hp_agilent_equipment@... <hp_agilent_equipment@...> on behalf of mmaseda@... [hp_agilent_equipment] <hp_agilent_equipment@...> Sent: 21 October 2017 17:25 To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] 1853-0063 transistor needed Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C? I’ve already have a query into Walter at Sphere. Thanks in advance, Manuel |
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Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
开云体育Hi,this looks like a power supply problem ;-)
I would invest a few hours on searching for the problem. If it is in the power supply, it is likely that you can fix it relatively easy. I would guess a bad capacitor or voltage regulator.
You can always get a new board, but first you should try to figure out what board you really need. I would be surprised if the problem is on A17.
Check the power supply and all other voltages before thinking about getting new boards!
Tobias
-------- Original message --------
From: "jehancoc@... [hp_agilent_equipment]"
Date: 10/21/17 21:08 (GMT+01:00)
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
?
I opened up my 8566B and found that the +12v on the A17 board to be reading 9.5V with 4.5 of AC ripple.??? The fuses on this board are ok.? No burning ext.
Should I just find a used board?? Is this board used in any others like the 8568b?
Thanks again.
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Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
Changing the board won't help unless the raw supply filter cap for that supply happens to be on it. You likely just need to find and replace the cap and it should be good to go. I believe the cap is chassis mounted, or on the motherboard, or on a separate assembly along with some others. ? Ed |
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Re: HP 1740A HV Oscillator has stopped running
开云体育By "Q3", do you mean "HV OSC Q1", the off board power transistor connected to T1-3?? The 7.27v base-emitter voltage would indicate either a bad connection to? "HV OSC Q1" (open emitter?) or a blown "HV OSC Q1".? If that part is socketed, pull it out and re-install.Dave On 10/21/2017 7:59 AM,
graham.l.n.butcher@... [hp_agilent_equipment] wrote:
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Re: 1853-0063 transistor needed
Bob Albert
I found several cross references.? I think NTE214 for instance.? It's a TO-3 PNP 3 MHz t5A 80V unit and there are many that can probably work in that slot.? I may have a few in my junkbox.? You can also use the plastic ones from Japan, but the number eludes me at the moment.? 2SB something. Bob On Saturday, October 21, 2017 10:32 AM, "'Paul Bicknell' paul@... [hp_agilent_equipment]" wrote: Hi Manuel
?
The only x ref I have for a
1853-0063 ??is a ????SJ 1528
Regards Paul B
From:
hp_agilent_equipment@...
[mailto: hp_agilent_equipment@... ]
Sent: 21 October 2017 18:26 To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] 1853-0063 transistor needed ?
?
Anyone
know of a source or cross reference for a 1853-0063 transistor used in the
410C? ?I’ve already have a query into Walter at Sphere.
?
Thanks in
advance,
Manuel
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Re: 8566B PL1 Unlock, PL2 Unlock and Ref Unlock
On my 8566B, I found that I have little or no output from the 100Mhz cal signal as well.? I haven't lifted the unit out of the rack yet, but to be clear, I have a blinking PL1 Unlock, PL2 Unlock and REF Unlock as well as the missing 100Mhz.? Actually, the 100Mhz seems to be there but won't drive a 50ohm load at all.
I'll check the voltages today.? By the way, I hope I need something specialized to fix this beast as I always enjoy a purchasing opportunity.? I have 2 x 8568Bs, lots of scopes and voltmeters, signal generators, etc.? What else could I need? Any input? Thanks |
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Re: 1853-0063 transistor needed
开云体育Hi Manuel ? The only x ref I have for a 1853-0063 ??is a ????SJ 1528 Regards Paul B From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
? ? Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C? ?I’ve already have a query into Walter at Sphere. ? Thanks in advance, Manuel No virus found in this message. |
Paul Bicknell