Power Switch Button for HP 1631D
I am missing the button on the end of the
power switch on my HP 1631D. It can still be turned on by
pushing the switch with a screw driver but doesn't look the
best.
Does anyone know if these switch buttons can
be sourced or is it a 3D print job? I don't have the CLIPs for
the unit so I can't identify the switch number but it looks like
the shaft on a standard push button switch except the shaft is
at 45 degrees (looks like a diamond from the front) and the
standard push button is generally not contoured.
Thanks
Dave
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Re: Equivalent NPN Transistor for 8560E
Dave C
Opps you are right about the swap of
letters, I guess that make it more difficult.
Thanks for looking it up.
Dave I
On 8/04/2019 6:47 pm, Dave Casey wrote:
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Show quoted text
1) You have your Xs and Ts transposed.
2) Looks like it crosses to a CXT2222A currently in stock
at Mouser and likely others. The "extra" lead in the body is
just like the tab on a TO-220 case; in this case it's the
collector as is the center pin.
Dave Casey
On Mon, Apr 8, 2019 at 5:31 AM
Dave Ireland < mirrors@...> wrote:
Tracked down the fault in a 8560E to
failure of the regulator transistor in the 100Mhz VCXO.
Substituted the supply and the oscillator circuit is
drawing little current so I am not sure why it would
have failed except there is evidence someone changed the
crystal so might have been their fault.
The transistor is listed is a
1854-1094 or manufacturer part number PTX2222A. Google
this results in a lot of Japanese and NPN thrown in the
mix. The Equivalents List says it is a MTX2222A which is
also a mystery.
I am assuming it is a SMD style
2N2222A but the under body solder pad with the 4 legs
has me a bit concerned it might be something special.
Anyone know this device? ? ?
Dave
|
Re: Equivalent NPN Transistor for 8560E
Doug
Thanks for that good detective work.
Looks like a 2222 will get it going in the short term while I fault find the long list of alarms.
Thanks again.
Dave
Sent from my Samsung GALAXY S5
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Show quoted text
-------- Original message -------- From: Doug Bercich <doug@...> Date: 8/04/2019 19:30 (GMT+08:00) To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] Equivalent NPN Transistor for 8560E
Took a little amount of sleuthing, but I f you search for pxt2222a115 it appears to be an ordinary 2222 variant. The tab, opposing middle pin and “heatsink” are all one pin; the collector.?
Here’s an Octopart link, and you can get them on eBay too:
https://datasheet.octopart.com/PXT2222A%2C115-Nexperia-datasheet-87582290.pdf
-d
?
From: [email protected] on behalf of Dave Ireland <mirrors@...>
Sent: Monday, April 8, 2019 5:31 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Equivalent NPN Transistor for 8560E
?
Tracked down the fault in a 8560E to failure of the regulator transistor in the 100Mhz VCXO. Substituted the supply and the oscillator circuit is drawing little current so I am not sure why it would have failed except there is evidence
someone changed the crystal so might have been their fault.
The transistor is listed is a 1854-1094 or manufacturer part number PTX2222A. Google this results in a lot of Japanese and NPN thrown in the mix. The Equivalents List says it is a MTX2222A which is also a mystery.
I am assuming it is a SMD style 2N2222A but the under body solder pad with the 4 legs has me a bit concerned it might be something special. Anyone know this device? ? ?
Dave
|
Re: HP 8720D - Debugging story
I've done some basic testing and found a few fun things.
1) The blue data to the LCD is not connected
2) The Source Out -> In jumper on the back is cracked and the loss is too high below 500 MHz for the PLL to reliably work. Swapping jumpers makes the PLL lock reliably so I need a replacement but the system seems ok
3) The CPU heatsink was installed without ever removing the plastic sheet on top of the thermal paste!
The CPU fan for my 8720D is a Sunon AVD0504B2-8. It is mechanically different from the one you say is on the 8720ES. Looking at it there's a lot of lateral play on the fan axis so it's unsurprising that it's loud when the VNA is on it's side. Disappointing for what seems to be a quality fan, but good enough for it's usual use. I'd like to source a spare, but it's a lower priority now.
I borrowed a calibration kit and was able to make full two port measurements that match expectations between 500 MHz and 2 GHz. The calibration seemed good up to 20 GHz, but I need a better DUT to check that. I'm making a Beatty Standard this week to test with.
A replacement BR-2/3A battery arrived and will get installed tonight.
|
Re: Equivalent NPN Transistor for 8560E
Took a little amount of sleuthing, but I f you search for pxt2222a115 it appears to be an ordinary 2222 variant. The tab, opposing middle pin and “heatsink” are all one pin; the collector.?
Here’s an Octopart link, and you can get them on eBay too:
https://datasheet.octopart.com/PXT2222A%2C115-Nexperia-datasheet-87582290.pdf
-d
?
toggle quoted message
Show quoted text
From: [email protected] on behalf of Dave Ireland <mirrors@...>
Sent: Monday, April 8, 2019 5:31 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Equivalent NPN Transistor for 8560E
?
Tracked down the fault in a 8560E to failure of the regulator transistor in the 100Mhz VCXO. Substituted the supply and the oscillator circuit is drawing little current so I am not sure why it would have failed except there is evidence
someone changed the crystal so might have been their fault.
The transistor is listed is a 1854-1094 or manufacturer part number PTX2222A. Google this results in a lot of Japanese and NPN thrown in the mix. The Equivalents List says it is a MTX2222A which is also a mystery.
I am assuming it is a SMD style 2N2222A but the under body solder pad with the 4 legs has me a bit concerned it might be something special. Anyone know this device? ? ?
Dave
|
Re: Equivalent NPN Transistor for 8560E
1) You have your Xs and Ts transposed.
2) Looks like it crosses to a CXT2222A currently in stock at Mouser and likely others. The "extra" lead in the body is just like the tab on a TO-220 case; in this case it's the collector as is the center pin.
Dave Casey
On Mon, Apr 8, 2019 at 5:31 AM Dave Ireland < mirrors@...> wrote:
Tracked down the fault in a 8560E to failure
of the regulator transistor in the 100Mhz VCXO. Substituted the
supply and the oscillator circuit is drawing little current so I
am not sure why it would have failed except there is evidence
someone changed the crystal so might have been their fault.
The transistor is listed is a 1854-1094 or
manufacturer part number PTX2222A. Google this results in a lot
of Japanese and NPN thrown in the mix. The Equivalents List says
it is a MTX2222A which is also a mystery.
I am assuming it is a SMD style 2N2222A but
the under body solder pad with the 4 legs has me a bit concerned
it might be something special. Anyone know this device? ? ?
Dave
|
Equivalent NPN Transistor for 8560E
Tracked down the fault in a 8560E to failure
of the regulator transistor in the 100Mhz VCXO. Substituted the
supply and the oscillator circuit is drawing little current so I
am not sure why it would have failed except there is evidence
someone changed the crystal so might have been their fault.
The transistor is listed is a 1854-1094 or
manufacturer part number PTX2222A. Google this results in a lot
of Japanese and NPN thrown in the mix. The Equivalents List says
it is a MTX2222A which is also a mystery.
I am assuming it is a SMD style 2N2222A but
the under body solder pad with the 4 legs has me a bit concerned
it might be something special. Anyone know this device? ? ?
Dave
|
Re: Service Manual for HP 3708A
Hi Dario, I can assist, drop me a private mail. vk3gjm@...Regards Gerald
|
Re: HP86320A heterodyne module - need info
If you can’t find anything check out data for the ‘similar ranges’ plugin for the 8690. It was the 8699B. DaveB, NZ
?
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From: [email protected] [mailto:[email protected]] On Behalf Of Ed Breya via Groups.Io
Sent: Monday, April 08, 2019 13:54
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] HP86320A heterodyne module - need info ? Does anyone have any info on the HP86320A heterodyne module? This was the back assembly of certain 862XX sweeper plug-ins from the 1970s. It provided two bands covering 100 MHz to 2 GHz, and 2-4 GHz, using a 2-4 GHz YTO for drive. I have a couple that I want to use for a project. I sort of had the basic hookups, supplies, etc figured out sufficiently many years ago, but of course now can't find my notes, and it still seems to be pretty obscure, info-wise. Not much out there on line. I mostly need to know the operating voltages for the power amplifier, the LO, and the proper PIN switch drive topology.
Ed
|
HP86320A heterodyne module - need info
Does anyone have any info on the HP86320A heterodyne module? This was the back assembly of certain 862XX sweeper plug-ins from the 1970s. It provided two bands covering 100 MHz to 2 GHz, and 2-4 GHz, using a 2-4 GHz YTO for drive. I have a couple that I want to use for a project. I sort of had the basic hookups, supplies, etc figured out sufficiently many years ago, but of course now can't find my notes, and it still seems to be pretty obscure, info-wise. Not much out there on line. I mostly need to know the operating voltages for the power amplifier, the LO, and the proper PIN switch drive topology.
Ed
|
Looking for pair of MK38p70 piggyback Microcontrollers
I got out bid on a stick of these. (MK38p70) I need a couple for a project. Anyone have any.?
|
Service Manual for HP 3708A
Hi everyone. Does anyone have or know where to find the service manual for HP 3708A? On EBay there are some on sale from America, but the shipping costs are greater than the cost of the manual itself. Thank you
Dario - IU3ARP
|
Re: Service notes library on microfiche (5951-6511)
Below an example of the reference to the service notes library from the 1992 2nd,?3rd. 4th Quarter Bench Briefs:  Thank you, Wolfgang Schraml, KI7PFX --------------------------------------------------------------------------------
On Thu, Mar 28, 2019 at 11:38 PM, Wolfgang Schraml wrote:
I have seen a service notes library referenced in many?of the older "Bench Briefs". Part number was 5951-6511 or H5320A.?
There was also a subscription service that could be ordered under part number 5951-6517 or H5299A.
Has anyone ever seen one of these microfiche packages? I keep looking on eBay but no success so far.
Thank you,
Wolfgang, KI7PFX
?On Thu, Mar 28, 2019 at 11:38 PM, Wolfgang Schraml wrote:
H5320A
|
Re: hp8640B strange output_fixed
Hi all,
I could fix the Generator!
The problem were missing wipers.
I could gain such wipers from a board connector. See attachment.
Best regards
Armin
HB9MFL
|
Hi,
Has anyone got a spare set of 3 plastic slide out instruction cards for the base of the 8970B? Happy to pay for a nice set.
Thanks
Kevin
|
Re: 08644-61040 STD Doubler
That's great Stephen. Thanks.
|
Correction:
Sorry for misinformation, the file system used by 7495 is FAT 32,
Or at least that is what my computer says about the card I used.
Wally KC9INK
|
Re: Free equipment, Los Angeles area
If the 3478 is still available I’d like it.?
On Friday, April 5, 2019, 6:55 AM, Glenn Little <glennmaillist@...> wrote:
If someone is going to pickup something else, I will pay packing and
shipping for the TM500 series plugins.
Thanks
Glenn
WB4UIV
On 4/5/2019 1:51 AM, johncharlesgord
via Groups.Io wrote:
List updated
Here is a list of test equipment that should really
get back into circulation.? Pickup only; I live in Venice, CA, a
neighborhood of Los Angeles.
(There is some very nice stuff here.)
I don't care if you use it, sell it, or give it away!? I just
want to get the equipment into circulation instead of letting my
kids send it to a landfill someday.
I am cross posting this to Tek, HP, and general test equipment
lists.
Contact me by email to arrange pickup.
--John Gord? ? ? email:? ?johngord (at) verizon (dot) net
Items marked with "*" are
known not to work
? ?other items worked when
stored away
?
Items marked with "*" are
known not to work
? ?other items worked when
stored away
?
Tektronix
2335 Tek analog scope
2445B Tek (no U800, bad PS)
321A Tek analog scope
422 Tek analog scope
454A Tek analog scope
7D15 Tek scope plugin
7D15 Tek scope plugin
DM501A Tek TM500 plugin
FG501A Tek TM500 plugin
FG503 Tek TM500 plugin
SC502 Tek (no crt)*
TM503 Tek TM500 mainframe
?
HP/Agilent
204D Oscillator
3466A 4.5 digit DVM
3478A 5.5 digit DVM
435A Power meter
435B Power meter
435B Power meter* bad Ref
output
?
Misc
616 Keithley digital
electrometer*
?
8050A Fluke DVM
?
9500 Racal-Dana Frequency
counter*
?
--
-----------------------------------------------------------------------
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"
|
Re: 08644-61040 STD Doubler
I’ll check stock on Monday. ?I have boxes of boards but none of it inventoried Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117?office (775) 720-6020?mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments.
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Show quoted text
On Apr 6, 2019, at 09:42, Mark Bielman < mbielman@...> wrote: Hello group. I am looking for a frequency doubler (08644-61040) for an 8644B.
Found one on ebay but priced a bit high. ($299)
Thanks!
Mark
|
Hello group. I am looking for a frequency doubler (08644-61040) for an 8644B.
Found one on ebay but priced a bit high. ($299)
Thanks!
Mark
|
Doug Bercich
Dario
Armin Roesch
