Greetings to all,
I am still seeking any service information and? service manuals? for
HP 3805 Distance Meter
HP 3810 Total Station
These are land surveying instruments and I am really impressed by their construction.??
I have the operation manuals.
I have many vintage items of HP equipment and really enjoy using them.
73 Gordon WA4FJC
gpbatey compuserve com
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IFR 1500 High Loop alignment
I have a IFR that had some PS issues due to a cap shot in the?
output amp, all that is cured.
This unit was pretty well behaved right up to 530 MHz send and receive,?
crisp CRT, keyboard works, right on the money level and freq wise, sensitivity, measurements etc
after 530 MHz would appear to be out of lock.
Tried to align high loop but do not have the TF 30 mentioned in the service manual,?
tried to wing it, now lots of? spurs.
Any suggestions on a TF 30 work around, or I would pay someone to do this alignment
as I am short on time,
Regards,
Mike
402 510 2040 for you old school guys
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Re: Off topic - IRF attenuators
Hi
Try Marconi group!
Regards
Hardy
?
?
Apologies – but secretly I reckon someone
here will know the answer to this, or at least where I should ask.
?
I have just acquired an IRF2025 with an
attenuator that is dodgy down at -60Bm and below. I read that dodgy attenuators
are not uncommon in this series.
?
What is the not uncommon fix, does anyone
know please?
?
Thanks
?
Colin Smithers
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Off topic - IRF attenuators
Apologies – but secretly I reckon someone here will know the answer to this, or at least where I should ask.
?
I have just acquired an IRF2025 with an attenuator that is dodgy down at -60Bm and below. I read that dodgy attenuators are not uncommon in this series.
?
What is the not uncommon fix, does anyone know please?
?
Thanks
?
Colin Smithers
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Re: Late model 5340A manual
Harold,
Did you check Artek manuals?
-Rik
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Does anyone have any information on where to find a service manual for a late model 5340A?? The latest that I can find (and have) is for SN 1840A and above with change sheets out to 2012A, yet I have one with a SN of 2532A and a couple in between.? Did HP ever make later manual revisions, or only change sheets?? Either would help me, so TIA for any pointers.
Thank you,
Hal
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Re: HP 3457A mains voltage setting
Thanks everyone. The cap seems to have some sort of positioning arrow
that indicates either 120 or 240 mains AC. But I guess that doesn't
matter.
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On Wed, Jun 9, 2021 at 9:47 PM Ozan <ozan_g@...> wrote:
On Wed, Jun 9, 2021 at 12:12 PM, cheater cheater wrote:
Crap... does that mean I need a different fuse holder before I can
start using this? The unit came from the US and I am in Europe.
---
Most likely the fuse inside is a standard fuse. Just push the cap in with a flat screwdriver and rotate counterclockwise to remove and inspect the fuse. If you want you can paint the fuse holder cap black with a permanent marker to match the original color for 220/240V (gray->110/120V, black->220/240V) after placing the correct fuse.
Ozan
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It`s been a month or more, and I can`t raise Don. Would one of his friends please get back to me
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Re: hp 35670A option 1D2 swept sine
I have not had any luck with finding this upgrade through Keysight here in Australia.
Mark
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Need info on TO-3 transistor insulator
I'm going crazy here. I've got a bunch of these high thermal conductivity hard-anodized aluminum TO-3 transistor mounting insulators salvaged from old gear, and planning to use some. I figured I'd check the thermal conductivity specs on line, and be done. I quickly found they are likely Thermalloy brand type 4703A, 4720A, or 4726A (same deal but slightly different outline sizes), with drawings and such, but no thermal specs. I can't seem to find any specs for these anywhere, just lots of pictures and references and ones for sale, but no useful info. Thermalloy apparently disappeared into a conglomeration some time ago. There's stuff floating around, but somehow it escapes me - maybe a mental block or 24 hour insanity. I even found the alumina types and specs, but no anodized. Somebody must still use and make these things. Or maybe all old/obsolete package stuff has disappeared for some reason.You'd think at least the old data sheets would be out there. The only outfits I recall from the old days are Thermalloy and Wakefield, and can't seem to spot anything useful on the later either. I just downloaded a recent Wakefield-Vette (now called) catalog, and they seem to be almost entirely about heatsinks and greases, and no hardware except some Kapton insulators.
Anyway, does anyone have this sort of info, maybe in old catalogs, or know where to look? All I need is the thermal resistance in simplest form deg C/W in TO-3 configuration.
Ed
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Re: Running the Agilent vintage PDNs below 300KHz
>>? Joe Smith formerly of Omaha ?
Sorry.
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Re: Running the Agilent vintage PDNs below 300KHz
Joe Smith formerly of Omaha ? ?
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From: [email protected] <[email protected]> On Behalf Of Joe Smith via groups.io
Sent: Wednesday, June 09, 2021 11:52 AM
To: [email protected]
Subject: [HP-Agilent-Keysight-equipment] Running the Agilent vintage PDNs below 300KHz ? I am curious what limits the E835xA PDNs to 300KHz and if there is a way to override it, with the understanding that the performance would be reduced???
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Re: HP 3457A mains voltage setting
On Wed, Jun 9, 2021 at 12:12 PM, cheater cheater wrote:
Crap... does that mean I need a different fuse holder before I can
start using this? The unit came from the US and I am in Europe.
--- Most likely the fuse inside is a standard fuse. Just push the cap in with a flat screwdriver and rotate counterclockwise to remove and inspect the fuse. If you want you can paint the fuse holder cap black with a permanent marker?to match the original color for 220/240V (gray->110/120V, black->220/240V) after placing the correct fuse. Ozan
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Re: Hp8558b spectral analyzer (2/2)
The capacitor in the original input assembly will block DC from reaching the attenuator.
Yours may have been damaged by having DC or excessive RF level applied to the input.
The attenuator should measure 50 ohms resistance because it is constructed of resistive divider elements.
This is a common problem.? There are numerous articles on-line that show how to check and repair these attenuators.
Such as:?
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Re: Verifying HP905A Sliding Load - request for further technical specs
Hello Dave,
Thank you for your answer. I've this manual but (unfortunately) the
information about phase slope and reflection group delay are not included and
the drawings contain no tolerances.
In that case someone owns such a sliding load and has the capability to
measure it, it would be helpful.
Our old 905A meets the SWR spec but the phase slope isn't linear as expected
and it doesn't change well by moving the slider. Each part has been cleaned
and inspected - similar to other sliding loads - and damages/scratches/etc.
are not visible. But the measurements show visible ripple and some phase jumps
- it requires more attention.
Best regards,
Stephan
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On Mittwoch, 9. Juni 2021 20:20:18 CEST you wrote: On 6/9/21 1:56 PM, Dr.-Ing. Stephan Massner via groups.io wrote:
I would verify some of our 'old' calibration equipment and my question is:
Does anybody have the spec sheet from the HP905A sliding load (1.8-18GHz)?
I'm interested in the following data:
- phase slope for lower/upper sliding position
- reflection group delay (max value)
- drawings (including tolerances) The service manual for the 905A is available here:
-Dave
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Re: Capturing screenshots on 8934C
Hi, For the 8924C, you must have a special cable to use it with the BTS software. Have you this cable? Wiring is OK? Printer config set to DESKJET ? BTS software and cable to have for 8924C ? . ? Otherwise, the 8924C does not seem to have a plotter function (HPGL image file), but only a printer function according to the little information I have. If there had been a possibility of an HPGL image, it would have been relatively simple. ? The BTS software should have worked, but I will see using another hp instrument, which has the printer DESKJET configuration if I can decode and retrieve an image. ? Yves ? ? I have the BTS laptop utility. It works perfectly on my 8935, but I can't get it to work on the 8924. I use the 8924 more because of it's auto-ranging feature.
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Re: HP 3457A mains voltage setting
It just means that you need to change the switch position and change the fuse itself, NOT the fuseholder.
Richard
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Show quoted text
Crap... does that mean I need a different fuse holder before I can
start using this? The unit came from the US and I am in Europe.
On Wed, Jun 9, 2021 at 7:34 PM Ozan <ozan_g@...> wrote:
>
> On Wed, Jun 9, 2021 at 09:26 AM, cheater cheater wrote:
>
> Hi all, I've noticed that my 3457A has two settings for the mains
> voltage. One is a circular selector with a flat head screwdriver slot,
> the other is a pair of sliders. I need to change it from US to Europe.
> Should I be changing both? Do I need to change anything else? (eg
> fuse?)
>
> Thanks a lot
>
> Looking at a picture of 3457A, circular one is the fuse holder. The picture I found says 80mA for 220/240 and 200mA for 100/120mA next to it, in consistent with the message from "tmillermdems".
> Ozan
>
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Re: HP 3457A mains voltage setting
Crap... does that mean I need a different fuse holder before I can
start using this? The unit came from the US and I am in Europe.
toggle quoted message
Show quoted text
On Wed, Jun 9, 2021 at 7:34 PM Ozan <ozan_g@...> wrote:
On Wed, Jun 9, 2021 at 09:26 AM, cheater cheater wrote:
Hi all, I've noticed that my 3457A has two settings for the mains
voltage. One is a circular selector with a flat head screwdriver slot,
the other is a pair of sliders. I need to change it from US to Europe.
Should I be changing both? Do I need to change anything else? (eg
fuse?)
Thanks a lot
Looking at a picture of 3457A, circular one is the fuse holder. The picture I found says 80mA for 220/240 and 200mA for 100/120mA next to it, in consistent with the message from "tmillermdems".
Ozan
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Re: Hp8558b spectral analyzer (2/2)
Hello,
NJ902, please?Can you be more specific
What’s a DC block?
For me a capacitor dont't indicate 0 ohm?
What is excatly the impedance of the attenuator?
If someone have a HP8558B analyzer and put un ohmeter on the N plug, what is the result: Infinite, 50 ohms, other????
Without specific cases of measurement I do not move forward
You said: ""The attenuator input section appears to be damaged,"
Why???
cdt
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Re: Hp8558b spectral analyzer (2/2)
The purpose of the capacitor in the input assembly would be a DC block.
It appears that the input assembly was changed on your unit.
The attenuator input section appears to be damaged,
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Mike Vande Voort
Rik Bos
Harold Foster
Gerard