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Date
Re: HP dual floppy drive ( 9122 or 9121) and hp 9153 Winchester included floppy drive repair
Hi Bill, It depends on the problem(s) with the drives. They are all probably Sony drives, and a common failure in them is that the grease on the insert/eject mechanism solidifies so that the floppies
By Stan · #150086 ·
Re: 8643A Will not power-up
Only one of them, NFS40-7624 (single output 24VDC) - this is the one closest to the IEC receptacle, and IIRC the easiest to access. If yours has the same power supplies as my unit, I have a list of
By fenugrec · #150085 ·
Re: What kind of chip is this?
From functional/performance point of view it must be similar to the HP83036C: It is quite small and low loss, still directive. Anybody knows what's inside this? Tom
By tom_iphi · #150084 ·
Re: What kind of chip is this?
From the levels in the block diagram I suspect that the device has at most 1dB loss, thus no passive bridge circuit. So, I guess it is basically a rectifier. It could be a coupler, but for the
By tom_iphi · #150083 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
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
By Dave_G0WBX · #150082 ·
Re: HP dual floppy drive ( 9122 or 9121) and hp 9153 Winchester included floppy drive repair
Unless you want to stay true to the old stuff, then an alternative is to use an emulator such as HPDrive or HPDisk if the drives are flaky.
By Anders · #150081 ·
Re: 5345A electronic counter *restoration adventure*
> Hi Wolfgang Schraml, > > From one very happy HP 3545A owner, thank you very much for your detailed > post. > > Kind regards, > Terry ZL1NOW > >
By Terry Gains · #150080 ·
Re: 5345A electronic counter *restoration adventure*
Hi *Wolfgang Schraml,* From one very happy HP 3545A owner, thank you very much for your detailed post. Kind regards, Terry ZL1NOW <https://www.qrz.com/db/ZL1NOW> Kind
By Terry Gains · #150079 ·
Re: HP 8670B amplifier - does it ring a bell with anyone?
I'm pretty sure it's real. Does it show up in any catalogs of that era? There's many free PDF hp test equipment catalogs online.
By VE6WMR · #150078 ·
HP 8670B amplifier - does it ring a bell with anyone?
Subject line says it all - expected coverage is 2-18 GHz but no other data can be found.
By David Feldman · #150077 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
Sending it to someone that can do the work is probably the best idea. My way of dealing with old diskettes is having old PCs running DOS and early windows and older linux that have 3.5, 5 1/4 and 8"
By tgerbic · #150076 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
Second that. Off to McGuire with it. Do NOT mess around with these disks with a Windows or Linux workstation. -- With best regards Tam HANNA Enjoy electronics? Join 21k4 other followers by
By Tam Hanna · #150075 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
Yup. Got it. Thanks. DaveD KC0WJN [email protected]> wrote:
By Dave Daniel · #150074 ·
Re: What kind of chip is this?
Probably a custom designed part ?
By Wilko Bulte · #150073 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
To the best of my knowledge, this is the only time this particular piece of software has shown up. Now is not the time to be experimenting. Spinrite is a surface scanning program, not a program
By Dave McGuire · #150072 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
I'd try and get hold of a parallel floppy.drive and if still no joy try and use an old.tool called spinrite on it back in the day I had success recovering data from floppy drives when all was lost.
By Paul Carrington · #150071 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
No, this is NOT an option. A USB-connected floppy drive does not allow register-level access to the floppy controller; in fact the required registers aren't even present. Such access is generally
By Dave McGuire · #150070 ·
Re: E5071C Port Coupler Issue?
For future reference if anyone is interested, the part that was bad causing the wavy response (S11, S22) on these units was a burnt out switch a little further down in the chain ( *1GC1-6234* ).? It
By Scott Vance · #150069 ·
Re: What kind of chip is this?
I looked up that HP83732A. Looks like only the rough info is included in the manual, but from the specs and block diagram it seems to be a very nice instrument. It covers the whole 1-20 GHz range with
By ed breya · #150068 ·
Re: Test Set Program Development Tool DEV_PL on 3.5" floppy
The disk is most likely in LIF format so your Windows machines won¡¯t recognize it. Best recommendation is to get it to Dave McGuire as he¡¯s volunteered to make it available to the public.
By Steve - Home · #150067 ·