Re: 5345A electronic counter *restoration adventure*
release dates: 1974, 1986 and May 1994, respectively
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Re: 5345A electronic counter *restoration adventure*
90025, 90047 and 90060 from Artek and Keysight. My sn is 1528A01265. Actually none of those cover my unit. Some of the boards have series that matches the manual, but A15 doesn't, for instance.
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Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
Yeah the greaseweazle is the proper thing to do especially when you want to archive something that isn't a known format. (also not affiliated) On Fri, Feb 14, 2025 at 3:40?PM Matt Harris via groups.io <kd4pbs@...> wrote:
Every person who has access to old floppy media of virtually any kind made for anything should own a Greasewazle.
(I'm not affiliated - I just appreciate the product that much!)
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Re: HP 8670B amplifier - does it ring a bell with anyone?
It's possible that this was a subpart of some other HP product or system, or maybe a custom OEM unit for a specific customer. Look inside for any parts or names or part numbers that can be identified. If there are any HP-made circuit boards for instance, they may have part number prefixes including the model number where first used.
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Ed
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Re: HP 54601A self test failure
On 2/14/25 18:34, mikemm58 via groups.io wrote: Bump... Do not do that here. First, this is a mailing list, not a web forum. Several thousand people just received a context-free email that said "bump". Second, we are all adults here. If someone had any assistance to provide, they'd have provided it by now. -Dave, list moderator -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP 54601A self test failure
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Looking for RF Limiter specs
Hi all,
I'm searching for specifications for the 5086-72xx RF Limiters.
I have a variety of equipment which I am trying to restore, and some items are missing RF hardware/modules inside. I don't necessarily know if I can find exact replacements but if I had specs I might be able to substitute with reasonable confidence. I have yet to find any data on RF Limiters other than the frequency range, which I feel isn't enough to go on.
Can anyone point me to a document?
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Many thanks in advance
Dave
Coos Bay, OR
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Re: HP 8670B amplifier - does it ring a bell with anyone?
Quite frankly, I don't think in the days of 8671A and 8672A (release date: spring 1976) there could have been a 2 to 18 GHz amplifier in one band only.
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On the other hand, the 86XX series is exclusively dedicated to signal generators of all kinds. As regards an amplifier, there should have been an apparatus whose reference should have started with 83 or 84.
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There has always been a model A at HP to precede a model B. So there would necessarily be a 8670A that could be traced before the 8670B. Both are not found in all my catalogs and documents (paper and PDF).
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Thank you for clarifying how you heard about this reference.
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F1EKU
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Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
On 2/14/25 15:39, Matt Harris via groups.io wrote: Every person who has access to old floppy media of virtually any kind made for anything should own a Greasewazle.
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(I'm not affiliated - I just appreciate the product that much!) Agreed 100%! -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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I would like them to mess with. I’d pay shipping.?
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On Feb 14, 2025, at 4:38?PM, billyatams via groups.io <billyatams@...> wrote:
? I have two 37718 OmniBERs that I would prefer to give to someone rather than trash them. ?One has boot errors. One (the older HP labeled unit) works fine. I bought them when I needed a cheap optical source. I have many very nice lasers now and do not need them. Free to pickup in northeastern Pennsylvania or will ship if someone wants to pay the freight.
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Bill
<IMG_7351.jpeg> <IMG_7352.jpeg> <IMG_7353.jpeg>
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I have two 37718 OmniBERs that I would prefer to give to someone rather than trash them. ?One has boot errors. One (the older HP labeled unit) works fine. I bought them when I needed a cheap optical source. I have many very nice lasers now and do not need them. Free to pickup in northeastern Pennsylvania or will ship if someone wants to pay the freight.
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Bill
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Re: 5345A electronic counter *restoration adventure*
What is the part number / release date for the service manual that you are using?
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Re: HP 8670B amplifier - does it ring a bell with anyone?
Dave,
In which catalogs exactly did you look?
So far no success finding any reference to the HP 8670B amplifier... Did find a couple of HP catalogs archived but didn't find any reference to the 8670B in any of those.
Figure the HP 8670B could be mid-1980s as the HP 8671/2/3 series synthesizers were also RF gear often in the same frequency range (2-18 GHz, some of those synthesizers were 10 MHz low end and 26.5 GHz high end). Perhaps chasing a dead-end, but thinking the model number similarity and functional similarity might mean something.
Trying get a photograph of the unit to post here to see if it jogs any memories!
73 Dave WB0GAZ
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Re: HP 8670B amplifier - does it ring a bell with anyone?
So far no success finding any reference to the HP 8670B amplifier... Did find a couple of HP catalogs archived but didn't find any reference to the 8670B in any of those.
Figure the HP 8670B could be mid-1980s as the HP 8671/2/3 series synthesizers were also RF gear often in the same frequency range (2-18 GHz, some of those synthesizers were 10 MHz low end and 26.5 GHz high end). Perhaps chasing a dead-end, but thinking the model number similarity and functional similarity might mean something.
Trying get a photograph of the unit to post here to see if it jogs any memories!
73 Dave WB0GAZ
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Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
Every person who has access to old floppy media of virtually any kind made for anything should own a Greasewazle.
(I'm not affiliated - I just appreciate the product that much!)
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Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
I wanted to put out there that "fdio" is another utility that has been used successfully to read LIF formatted disks:
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Like the other solutions, it needs a PC with a real floppy controller (i.e., NOT USB).
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That web page also has some excellent detailed information on disk formats.
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As tgerbic mentioned, HP gear with a 3.5 disk drive can read LIF format also. ?Specifically, I can vouch for the 16700 series logic analyzers. ?I was able to read a LIF formatted disk from 1987 with the following characteristics:
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? ? ? ? ? ? heads: ?2
? ? ? ? ? ?tracks: ?77
? ? ? ? ? sectors: ?16
? ? ? sector_size: ?256
? ? transfer_rate: ?250
? ? track_density: ?135
? ? data_encoding: ?2
? ? ? ? ?capacity: ?630784
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The analyzer runs HP-UX, so the data is easily transferred elsewhere once read.
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LIF disks can also be read on Linux machines (again with an attached floppy controller), but it is not straightforward. ?"dd" will not work for 256 bytes/sector, but "fdrawcmd" will.
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-mark
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Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
As a grateful user of spinrite for many years, I can add my thumbs up to Dave's excellent description of its many capabilities. Its format-agnostic algorithms are quite powerful. Spinrite has saved my bacon more than once.
--Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
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On 2/14/2025 12:44 AM, Dave_G0WBX via groups.io wrote:
Indeed Spinrite is a disc scanning and (where physically possible, that is, the disk is not beyond use due to physical damage to it's surface etc) an error recovery tool.? (I have my own licenced copies of 6.0 and now 6.1)
It is OS/data content/Format agnostic, it can happily scan a LIF format disk and do it's work, just as well as with any other OS's file system, as it only works on tracks and sectors.? The content and format of the actual data in the sectors is not important.? (I.e.? If the hardware can read it, it can be tested.)
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Re: 5345A electronic counter *restoration adventure*
PS.:
I already read all those service notes and none is relevant now.
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Re: 5345A electronic counter *restoration adventure*
First of all, I apologize about what I said about the manual, I didn't want to sound rude.
I simply wanted to point out that it is the first HP manual that I have used that has such disorganized content and a clear lack of explanation of some circuits. HP has me very bad used to it :D other manuals are a delight, but with this one I found a wall to break my head against. The one with 8660 was also difficult for me to follow.
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Getting back to the topic:
I'm going to get extender boards to continue probing the problem with the clock signal. At least it will make something easier for me. Even if I have to keep hitting myself with the manual.
If anyone experienced same symptoms or have any other idea, please let me know ;)
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Regards,
R.
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Re: What kind of chip is this?
Well, since you have just made successful measurements on it, the part must be OK, so this is all moot - you're good to go unless there's a problem somewhere else.
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I'd guess that it's still some sort of bridge inside, but with much lower through-line sampling resistance to keep insertion loss down, in exchange for some sensitivity and directivity.
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Ed
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RubenRubio
Dave McGuire
Dave Borcher
