HP-Agilent-Keysight-equipment@groups.io

CHECK OUT THE WIKI The purpose of the wiki is mainly to allow you to find information on instruments, either from either

The model number
The function(s) listed below. Some instruments have multiple functions - for example, the 4195A is a VNA, spectrum analyzer and an impedance analyzer. Therefore the 4195A is listed in multiple categories

Please also check out HPWiki available here:

Accessory kits - various types
AC power analyzers - PA2201A and PA2203A
AC power supplies 6811C, 6812C, 6813C
Airlines
Arbitrary waveform generators M8194A
Amplifiers?493A, 495A?
Attenuators (optical) 8156A, 8157A, 8158B, 81566A, 81576A,?
Attenuators (RF) 8494A
Attenuator set (500 Ω) 350C
Attenuator set (600 Ω) 350D
Attenuator switch driver
Audio analyzers? 8903A, 8903B, 8903E,? ?
Base station test sets
Bit error rate testers (BERTs)
Cables
Capacitance meters U1701A, U1701B, 4272A, 4278A, 4279A
Capacitor Bridge 4270A,
Capacitor standards 16380A, 16380C,?
Carrier noise test setsi
Cesium frequency standards
Clamp ammeters
Close field probes
Crystal Impedance E4915A, E4916A
Data Acquisition Systems (DAQs)
DC power analyzers
DC power supplies 6030A , 6031A , 6032A, 6033A, 6035A, 6131C, 6621A, 6622A, 6623A, 6624A, 6627A, 6255A, 6645A, 6671A, 6672A, 6673A, 6674A, 6675A, 62003A, 62003C, 62003E, 62004A, 62004B, 62004E, 62005A, 62005B, 62005E, 62006A, 62006B, 62006E, 62010A, 62010C, 62010E, 62012A, 62012C, 62012E, 62015A, 62015C, 62015E, 62018A, 62018C, 62018E, 62024A, 62024C, 62024E, 62028A, 62028C, 62028E, 62048A, 62048C, 62048E
Delay lines
Detectors
Device current waveform analyzers
Digital communications analyzers
Directional couplers
Distortion analyzers 330B, 330C, 330D, 331A, 332A, 333A, 334A, 339A, 8903A, 8903B, 8903E,???
Dynamic measurement DC source
Electrometers
Fading simulators
Femto ammeters
Filters
Frequency counters 522B, 5342A 5343A 5352B
Frequency standards?
- Cesium frequency standards 5090A
- Off-air 60 kHz frequency standards
- Off-air 200 kHz frequency standards
- Off-air GPS frequency standards
- Quartz frequency standards 105A, 105B
Function Generators ? 3310A,? 8165A,
GPIB controllers, extenders, cables etc.
GPS frequency standards
Harmonic mixers
High resistance meters 4339B
- High resistance meter fixtures 16008B
HEV EV Grid Emulators and Test Systems
In-circuit test systems
Impedance analyzers 4195A, 4291A, 4291B, 4395A, 4396A, 4396B, 4294A, E4990A, E4991A
Impedance Analyzer Accessories
- Impedance Test Kit 41951A,?
- Test Fixture Adapter 16099A
- Test Fixture 16034G, 16034H, 16047A, 16191A, 16192A, 16193A, 16093B, 16194A, 16452A,
- Test Head 4291B
Impedance / Gain Phase analyzer 4194A
Impedance Meter 4193A,
Isolators
LCR meters? U1701A, U1701B, U1731A,? U1731B, U1731C, U1732A, U1732B, U1732C, U1733C, 4191A , 4192A, 4194A, 4195A, E4196A,? 4216A, 4260A, 4261A, 4262A? 4263A, 4263B, 4271B, 4274A, 4275A, 4276A , 4277A, 4284A, 4285A, 4286A, 4287A, 4291A, 4291B, 4294A, 4332A, 4342A, 4395A, 4396A, 4396B, E4980A and E4980AL
LCR meter calibration devices? 16380A 42030A? 42090A, 42091A and 42100A
LCR meter accessories
- 2-Terminal BNCs.
  - 41900A, 41901A
- 4-Terminal Pair (BNC connectors)
  - Cable extension 16048A, 16048D, 16048E, 16048G, 16048H
  - DC current bias accessories 42841A, 42842A, 42842B, 42842C, 42843A
  - DC voltage bias accessories 16065A, 16065C,
  - Kelvin clips 16089A, 16089B, 16089C,16089E
  - Lead Components 16047A,16047B, 16047D, 16047E
  - Material 16451B, 16452A
  - Probes 42941A
  - SMD 16034E, 16034G, 16034H
  - 2-port 16096A
- 7 mm (APC7)
  - APC-7 Connector Repair Kit 11591A
  - Binding post 16093A, 16093B
  - DC voltage bias accessory 16200B,
  - Lead components 16092A
  - Material 16453A, 16454A
  - SMD? 16192A, 16194A, 16196A, 16196B, 16196C, 16196D, 16197A, 16198A
LCZ meters? 4276A, 4277A,
Lightwave clock / data receivers
Lightwave converter
Lightwave component analyzer
Lightwave measurement system mainframes
Lightwave polarization analyzers 8509B
Logic analyzers
Nemo wireless network solutions.
Noise and interference test set
Noise figure analyzers
Noise sources 346A, 346B. 346C ,
Matching pads (50 ohm to 75 ohm or similar)
Materials test equipment
Microwave repeaters
Microwave downconverters 70427A
Microwave / THz sources
Milliammeter 428B
Milliohm meter
Mobile communications DC source
Modular instruments
- AXIe
- Data acquisition (DAQ)
- USB
- PXIe
Modulation analyzers
Multimeters 427A, 970A
Optical attenuators
Optical heads
Optical sources
Optical spectrum analyzers
Oscilloscopes 120A, 120AR, 120B, 122A, 130A, 130B, 130BR, 130C, 140A, 140B, 141A, 150A, 150AR, 160B, 180A, 180AR, 180CD, 181A, 181AR, 181T, 181TR, 182C, 182T, 183A, 183B, 184A, 184B, 185A, 185B, 1200A, 1200B, 1220A, 1221A, 1703A, 1707A, 1707B, 1710A, 1710B, 1715A, 1722A, 1725A, 1726A, 1740A, 1741A, 1742A, 1743A, 1744A, 1746A, 1980A, 1980B, 5403A, 6000A, 6000L, 16533A, 16534A, 54100A, 5410B, 54100C, 5100D, 54111D, 54120A, 54120B, 54200A, 54501A, 54502A, 54503A, 54504A, 54520A, 54520C, 54540A, 54540C, 54542A, 54542C, 54600B, 54601A, 54601B, 54602B, 54603B,? 54645A, 54654N, 54710A, 54720A, 54750A, 54825N, E1428,?
Oven controlled crystal oscillators (OCXOs)
Pattern generators
PCM terminal test set
Phase noise measurement
Pico ammeters
Printers 2225
Plotters 7470A, 7475A?
Probes
Protocol analyzers and exercisers.
Power booster test sets
Power meters 431A, 431B, 431C, 432A, 435A, 435B, 437B, 438A
Power splitters
Power supplies
Pulse generators
Q-meters 4342A?
- Q-meter calibration inductors 16470A
Reflection transmission test set
Return loss module (optical)
Relays / switches / switch matrices (optical)
Relays / switches / switch matrices (RF)
Resistor standards 42030A?and 42100A
S-parameter test sets
Scalar network analyzers
SCSI bus preprocessor interface E2324A
Selective level meters 3746A
Semiconductors
Semiconductor parameter analyzers 4145A, 4155B, 4156B,
Signal analyzers
Signal generators / sweep generators / signal sources / oscillators 200CD, 201B, 209A, 204D,? 608A,? 8165A
Software
Source measure units
Spectrum analyzers 4195A,???
Switch control units
SWR meter 415E?
Time interval? counters
Time mark generator 226A
Timing and data state modules
Torque wrenches
Transmitter testers
Trigger modules
Ultrasound transducers
Universal bridge? 4260A, 4265A, 4265B?
Vacuum tube voltmeter 410C
Vector Impedance Meter 4193A, 4800A, 4815A
Vector Network Analyzers (VNAs) 4195A,? 8510A, 8510B, 8510C, 8753A, 8753B, 8753C, 8753D, 8753E, 8753ES, 8752ET, 8719A, 8719B, 8719C, 8719D, 8720A, 8720B, 8720C, 8720D, 8720ES, 8722A, 8722B, 8722C, 8722D, 8722ES,
Vector Network Analyzers (VNA) calibration kits 85032B, 85032E, 85033C, 85033D, 85033E, 85050B, 85050C, 85050D, 85052B, 85052C, 85052D, 85054A, 85054B, 85054D, 85056A
Vector Network Analyzer (VNA) verification kits
Vector Signal Analyzer 89650S, 89600S
Vector voltmeters 8405A, 8508A,
VXI mainframes 70000B, 70000C
Waveform and function generators
Waveguide to waveguide and waveguide to coaxial transitions.
Wireless 58 OTA chambers
Wireless channel emulators
Wireless network emulators
Wireless communication test sets

Re: HP-608A Repair

Bob Albert

#48293

Richard,

Perhaps you and I could get that beast going.  Between us we have the resources, for the most part, and it would be fun.

Trouble is, I think it's too far away.

Bob

Show quoted text

--- On Thu, 12/20/12, Richard Knoppow <dickburk@...> wrote:

From: Richard Knoppow <dickburk@...>
Subject: Re: [hp_agilent_equipment] HP-608A Repair
To: hp_agilent_equipment@...
Date: Thursday, December 20, 2012, 4:27 PM

----- Original Message -----
From: "Dennis Klipa" <klipadk@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, December 20, 2012 3:37 PM
Subject: Re: [hp_agilent_equipment] HP-608A Repair

Richard and Dave,

Thanks for the leads.? I did find that it is theHP 608D
with the crystal
calibrator option.? I also found a photo of a 608Dwithout
the crystal
calibrator.

I am still looking for someone who might repair these
things, notwithstanding the question of whether it is
worth the expense.

Best Regards,
Dennis, N8ERF
? ? These are not too difficult to work on. The
handbook
procedure is fairly complete. There are some tricks if the
dial does not come in to calibration.? Most of the
problems
are from tubes, either in the power supply or the 6CL6 tubes

used in the modulator/level control circuit.? I don't
know
how available the pencil tubes are these days.? I also

suspect that the electrolytic caps should all be replaced as

routine. Its possible one of the custom cap makers, like
Hayseed Hamfest can help. Depending on what you want to do
with it its a very good generator.

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@...

------------------------------------

Yahoo! Groups Links

? ? hp_agilent_equipment-fullfeatured@...

Re: 3456A Voltmeter

#48292

It is probably not a problem.  The input impedance on the low voltage DC ranges is very high (over 10000 MEG ohms), so even 1 pico ampere of bias current would produce over 10mV of apparent input voltage with open terminals.
     Try shunting a 10 MEG ohm resistor across the input and see what the DC voltage reading is.


--John Gord

Show quoted text

--- In hp_agilent_equipment@..., Michael Hong <mcllhns@...> wrote:

Hi everyone,
I just bought two 3456As from the same dealer off eBay.
Both of them have the same problem. When they are turned on, the number drift from low mV number and goes up to -8.nnnnn for one meter and the other meter to -6.nnnn. And then float around there. When I short the leads at Ohm or Volt setting, they show the near zero and when disconnected, go to their the number again.

I expect they stay at very low mV or zero without any input. What seems be the problem?
Thank you.


[Non-text portions of this message have been removed]

Re: HP-608A Repair

#48291

Show quoted text

----- Original Message ----- 
From: "Dennis Klipa" <klipadk@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, December 20, 2012 3:37 PM
Subject: Re: [hp_agilent_equipment] HP-608A Repair

Richard and Dave,

Thanks for the leads.  I did find that it is the HP 608D with the crystal
calibrator option.  I also found a photo of a 608D without the crystal
calibrator.

I am still looking for someone who might repair these
things, notwithstanding the question of whether it is worth the expense.

Best Regards,
Dennis, N8ERF
   These are not too difficult to work on. The handbook procedure is fairly complete. There are some tricks if the dial does not come in to calibration.  Most of the problems are from tubes, either in the power supply or the 6CL6 tubes used in the modulator/level control circuit.  I don't know how available the pencil tubes are these days.  I also suspect that the electrolytic caps should all be replaced as routine. Its possible one of the custom cap makers, like Hayseed Hamfest can help. Depending on what you want to do with it its a very good generator.

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@...

Re: 3456A Voltmeter

J. Forster

#48290

Input offset current.

-John

============

Show quoted text

Hi everyone,
I just bought two 3456As from the same dealer off eBay.
Both of them have the same problem. When they are turned on, the number
drift from low mV number and goes up to -8.nnnnn for one meter and the
other meter to -6.nnnn. And then float around there. When I short the
leads at Ohm or Volt setting, they show the near zero and when
disconnected, go to their the number again.

I expect they stay at very low mV or zero without any input. What seems be
the problem?
Thank you.

Re: HP-608A Repair

#48289

Richard and Dave,

Thanks for the leads.  I did find that it is the HP 608D with the crystal
calibrator option.  I also found a photo of a 608D without the crystal
calibrator.

I am still looking for someone who might repair these
things, notwithstanding the question of whether it is worth the expense.

Best Regards,
Dennis, N8ERF

Show quoted text

On Thu, Dec 20, 2012 at 2:58 PM, Richard Knoppow <dickburk@...>wrote:

**

----- Original Message -----
From: "Dennis" <klipadk@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, December 20, 2012 7:24 AM
Subject: [hp_agilent_equipment] HP-608A Repair

I have a 608A that is in need of some repair. Actually, I
am not sure which "letter" it is as the label with model
and serial number is missing. The unit does work, but the
wave form is not very good in some ranges and there are a
few other issues. Is there anyone out there who
refurbishes these units. A few years ago, I found a place
on the web in Washington State, I think, that refurbished
them, but I can't find it now.

I have been telling myself that I would do it myself but I
just can't seem to get it up on the priority list. I did
search the archives but didn't find anything helpful.
There might be something but nothing popped up in my
search. Any help would be appreciated.

Best Regards,
Dennis, N8ERF
Check the -hp- archive site, there are old catalogues
at:

Also see:

where there are many photographs of older equipment and may
help to identify it.

The 608 series is shown at:

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@...

3456A Voltmeter

#48288

Hi everyone,
I just bought two 3456As from the same dealer off eBay.
Both of them have the same problem. When they are turned on, the number drift from low mV number and goes up to -8.nnnnn for one meter and the other meter to -6.nnnn. And then float around there. When I short the leads at Ohm or Volt setting, they show the near zero and when disconnected, go to their the number again. 

I expect they stay at very low mV or zero without any input. What seems be the problem?
Thank you.

Re: JFET type? used in 8558B SA

Geoff

#48287

Priority International is a scam, I send all small packages up to 4# First Class International for a lot less and delivery is typically 3-4 days to the majority of EU. I do not ship to Italy.

Show quoted text

----- Original Message ----- 
  From: Dennis Czelusniak 
  To: hp_agilent_equipment@... 
  Sent: Thursday, December 20, 2012 4:31 PM
  Subject: Re: [hp_agilent_equipment] Re: JFET type? used in 8558B SA

  Ask ebay seller to ship USPS priority in small USPS box. He will still be making money on shipping and you should not be charged any extra.

  From: erich_schlecht <schlechtca@...>
  To: hp_agilent_equipment@... 
  Sent: Thursday, December 20, 2012 4:13 PM
  Subject: [hp_agilent_equipment] Re: JFET type? used in 8558B SA

  Symon,

  I just looked and the ebay guy is the same as Global test, and they want a ridiculous amount to ship overseas. ($45!)

  Erich

  --- In hp_agilent_equipment@..., "erich_schlecht" <schlechtca@...> wrote:
  >
  > Symon,
  > 
  > Four possibilities -
  > 
  > 1. Already mentioned, try Agilent
  > 
  > 2. There's a guy on Ebay selling them, item 251023608740
  > 
  > 3. Commercial vendors: 
  > Talon-- 
  > Global test -- 
  > Tucker -- 
  > 
  > 4. Substitute a (relatively) commonly available 2N4416, which has similar specs to the numbers Vladan gave.
  > 
  > Good luck!
  > 
  > Erich
  > 
  > 
  > 
  > --- In hp_agilent_equipment@..., "kennedysymon" <torview@> wrote:
  > >
  > > Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
  > > My web searches have failed
  > > Thanks, Symon G4DND
  > >
  >

  ------------------------------------

  Yahoo! Groups Links

------------------------------------------------------------------------------

  No virus found in this message.
  Checked by AVG - www.avg.com
  Version: 10.0.1430 / Virus Database: 2637/5473 - Release Date: 12/20/12

Re: N-type and SMA handling and user guide

#48286

Hi Brooke and Painovt,

Thanks for the feedback and usefull links.

The biggest single issue I have with a bunch of my Engineers is how to communicate they need to respect and be responsibility of handling, cleaning and storage of precision machined connectors.

How true. "Bad connectors result in bad measurements"

The HP document and the Microwaves101 helps.

Merry Christmas and a happy new year to everyone.

Regards

Gerald
VK3GJM

Show quoted text

--- In hp_agilent_equipment@..., Brooke Clarke <brooke@...> wrote:

Hi:

I was part of a group that looked into how our microwave company could improve and the No. 1 issue turned out to be bad
connectors/adapters.
They were typically just tossed into a machinist's chest tool drawer and every time the drawer was opened or closed the
banged into each other.
Bad connectors result in bad measurements.

Have Fun,

Brooke Clarke



hp_agilent_equipment@... wrote:
  N-type and SMA handling and user guide

Re: JFET type? used in 8558B SA

kennedysymon

#48285

Jim, Ed, David, Vladan, Erich & Dennis,
All info gratefully noted. ... As for that ebay seller wanting $45 for int shipping - who are they kidding? I've got family in Cleveland OH., so can ask them to ship there and the family send on to me... I've also had direct mail from Joel who has kindly offered to sell me some. With all the help on here I know a lot more than I did and I reckon my problem is virtually solved!
Thanks guys, Symon

Re: JFET type? used in 8558B SA

#48284

Ask ebay seller to ship USPS priority in small USPS box. He will still be making money on shipping and you should not be charged any extra.

From: erich_schlecht <schlechtca@...>
To: hp_agilent_equipment@...
Sent: Thursday, December 20, 2012 4:13 PM
Subject: [hp_agilent_equipment] Re: JFET type? used in 8558B SA

Symon,

I just looked and the ebay guy is the same as Global test, and they want a ridiculous amount to ship overseas. ($45!)

Erich

--- In hp_agilent_equipment@..., "erich_schlecht" <schlechtca@...> wrote:

Symon,

Four possibilities -

1. Already mentioned, try Agilent

2. There's a guy on Ebay selling them, item 251023608740

3. Commercial vendors:
Talon-- 
Global test -- 
Tucker -- 

4. Substitute a (relatively) commonly available 2N4416, which has similar specs to the numbers Vladan gave.

Good luck!

Erich

--- In hp_agilent_equipment@..., "kennedysymon" <torview@> wrote:

Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
My web searches have failed
Thanks, Symon G4DND

------------------------------------

Yahoo! Groups Links

[Non-text portions of this message have been removed]

Re: JFET type? used in 8558B SA

#48283

Symon,

I just looked and the ebay guy is the same as Global test, and they want a ridiculous amount to ship overseas. ($45!)

Erich

Show quoted text

--- In hp_agilent_equipment@..., "erich_schlecht" <schlechtca@...> wrote:

Symon,

Four possibilities -

1. Already mentioned, try Agilent

2. There's a guy on Ebay selling them, item 251023608740

3. Commercial vendors:
Talon-- 
Global test -- 
Tucker -- 

4. Substitute a (relatively) commonly available 2N4416, which has similar specs to the numbers Vladan gave.

Good luck!

Erich

--- In hp_agilent_equipment@..., "kennedysymon" <torview@> wrote:

Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
My web searches have failed
Thanks, Symon G4DND

Re: JFET type? used in 8558B SA

#48282

Symon,

Four possibilities -

1. Already mentioned, try Agilent

2. There's a guy on Ebay selling them, item 251023608740

3. Commercial vendors:
Talon-- 
Global test -- 
Tucker -- 

4. Substitute a (relatively) commonly available 2N4416, which has similar specs to the numbers Vladan gave.

Good luck!

Erich

Show quoted text

--- In hp_agilent_equipment@..., "kennedysymon" <torview@...> wrote:

Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
My web searches have failed
Thanks, Symon G4DND

List of HP 70000 modules

David Kirkby

#48281

If  you own or know of the HP 70000 series modular measurement system,
you will know it consists of a display unit, with modules which plug
in, and can be configured to do various things - spectrum analyzer for
example. If you have more modules, you just add another mainframe.

Does anyone have a list of the modules available for this? I found a
partial attempt of this at



I just did a few searches on eBay, on terms I thought might be used,
and see these listed. Can anyone add any more? These are in numerical
order.

700001A MAINFRAME
70004A COLOR MAINFRAME DISPLAY
70100A Power Meter
70205A GRAPHICS DISPLAY
70300A Tracking Generator 20 Hz to 2.9 GHz
70301A Microwave Tracking Generator.
70310-60016 40V Power Supply Pack Precision Frequency Reference 70000
70310A Precision Freq ref Frequency Reference
70311A Clock Source Module
70340A Microwave Synthesizer, 1 GHz to 20 GHz
70420A Baseband Phase Noise Test Set
70600A Preselector Module, 0-22GHz, for MMS System
70611A MMS Module Attenuator / Switch Driver
70612A K52 MMS INTERFACE POWER AMPLIFIER
70612A K53 MMS INTERFACE MIXER MODULE
70612C K51 MMS INTERFACE TEST PORT MUX
70612C K54 MMS STIMULUS RESPONSE MATRIX
70620A Pre-Amplifier Plug-In 2-22GHz
70700A Digitizer Module
70800B MSIB CABLE 1 METER ~ HP 70000 SERIES
70810B Lightwave Receiver Module 1200nm to 1600nm
70820A Microwave Transition Analyzer, DC - 40 GHz
70842A Error Detector Plug-in, 100Mb/s to 3Gb/s Telecom Test Module
70842B Error Detector Plug-In Option H50 .05-3Gbit/s
70846A Error Detector, 50 Mb/s to 1 Gb/s, Plug-In
70900A Local Oscillator Module provides a swept LO signal of 3.0 to 6.6 GHz
70902A IF Section Plug-In 10Hz-300kHz
70903A 100kHz - 3MHz IF Module
70905A 50 kHz TO 22 GHz RF SECTION
70905B RF Section 50 kHz - 22 GHz
70907A EXT MIXER FOR 70000 SPECTRUM ANALYZER
70909A 100Hz - 26.5GHz RF plugin.

Dave, G8WRB

Re: JFET type? used in 8558B SA

#48280

Hi Symon,

There is no standard part number for this FET, but it was made by several manufacturers including TI, Motorola and Siliconix.

N-ch, depletion mode
Abs. max power rating: 300mW
Gfs: 2-6 millimho at Vds=20V
BVGDS: 30V min.
Idss: 3-10 mA
Vp/Vgs (threshold): 2-6V
Igss: 1nA max.
Css: 6pF max.
Crss: 2 pF max


Good luck,

Vladan

Show quoted text

--- In hp_agilent_equipment@..., "kennedysymon" <torview@...> wrote:

Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
My web searches have failed
Thanks, Symon G4DND

Re: JFET type? used in 8558B SA

kennedysymon

#48279

Jim, Ed and David,
Thank you so much for your very helpful replies.
These JFET's are used in the 8558B's T/B scan control switching & and pinch-off/saturate with very low ID. I've tried a few common JFET's and they don't work in this circuit.
Of general interest to anyone keeping an elderly 8558B alive, I've recently had a few of the RCA op-amps (HP 1826-0013) fail. These are similar to common 741's, but the last one failed  positive supply to + I/P and it zapped four of these JFET's and since I've been tearing my hair out looking for replacements. The other 1826-0013's simply went noisy O/P without the any catastrophic consequence...
I don't often contribute to the group (lack of test gear experience), but really enjoy the lively discussions!
Regards to all, Symon (retired medical electronics technician)

Re: HP-608A Repair

#48278

Show quoted text

----- Original Message ----- 
From: "Dennis" <klipadk@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, December 20, 2012 7:24 AM
Subject: [hp_agilent_equipment] HP-608A Repair

I have a 608A that is in need of some repair.  Actually, I am not sure which "letter" it is as the label with model and serial number is missing.  The unit does work, but the wave form is not very good in some ranges and there are a few other issues.   Is there anyone out there who refurbishes these units.  A few years ago, I found a place on the web in Washington State, I think, that refurbished them, but I can't find it now.

I have been telling myself that I would do it myself but I just can't seem to get it up on the priority list.  I did search the archives but didn't find anything helpful. There might be something but nothing popped up in my search.  Any help would be appreciated.

Best Regards,
Dennis, N8ERF
    Check the -hp- archive site, there are old catalogues at:

Also see:

where there are many photographs of older equipment and may help to identify it.

The 608 series is shown at:

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@...

Re: HP-608A Repair

#48277

--- In hp_agilent_equipment@..., "Dennis" <klipadk@...> wrote:

I have a 608A that is in need of some repair.  Actually, I am not sure which "letter" it is as the label with model and serial number is missing.  The unit does work, but the wave form is not very good in some ranges and there are a few other issues.   Is there anyone out there who refurbishes these units.  A few years ago, I found a place on the web in Washington State, I think, that refurbished them, but I can't find it now.

I have been telling myself that I would do it myself but I just can't seem to get it up on the priority list.  I did search the archives but didn't find anything helpful.  There might be something but nothing popped up in my search.  Any help would be appreciated.

Best Regards,
Dennis, N8ERF
You might get a lead on which model you have by downloading manuals for the various versions and comparing pictures in the to the unit you have.  It's been years since I was inside one of them, so I can't give you anything from memory.  Seems like there were a few tubes that changed types over the course of the model changes; that might be an easy place to start.
Mechanical changes around the tuner assembly might help as well.

Look at  for some of the manuals.

Cheers,
Dave M

Re: JFET type? used in 8558B SA

David Kirkby

#48276

On 20 December 2012 14:52, kennedysymon <torview@...> wrote:
Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
My web searches have failed
Thanks, Symon G4DND

Agilent's find-a-part says they are available in limited quantity at $4.98.

"Mod and Ser Nbr Reqd Transistor J-FET N-channel D-Mode Silicon"

Interestingly you have the site find what products use that part. It
only lists a couple.

Dave, G8WRB

Re: JFET type? used in 8558B SA

#48275

If it's a TO-18 style with three leads, and used for general purpose analog signal routing, it's likely one of the 2N4391-3 family N-channel JFET - a very common part and easy to substitute. If it's a four-leaded TO-18 used as a sample/hold amplifier, then it's probably a 3N1XX type MOSFET. There's a series of them with part designations within the range of 3N126 to 3N138 or so. I think HP commonly used the 3N138.

Ed

Show quoted text

--- In hp_agilent_equipment@..., "kennedysymon" <torview@...> wrote:

Does anyone please know of an available equivalent for the HP JFET P/N 1855-0062 or what its characteristics are?
My web searches have failed
Thanks, Symon G4DND

Re: N-type and SMA handling and user guide

#48274

Hi:

I was part of a group that looked into how our microwave company could improve and the No. 1 issue turned out to be bad connectors/adapters.
They were typically just tossed into a machinist's chest tool drawer and every time the drawer was opened or closed the banged into each other.
Bad connectors result in bad measurements.

Have Fun,

Brooke Clarke

hp_agilent_equipment@... wrote:

Show quoted text

  N-type and SMA handling and user guide

102961 - 102980 of 151224

开云体育