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I can't find anything more about this HP83036C. I just dug up a paper manual I have for HP85027A/B/C - I have one of these directional bridges from long ago, but I think it's shot, so I never actually

I have done some measurements, see attachment. The beast is highly directive, at the same time it has very low loss. It is similar to the HP83036C directional detector. Compared to a normal diode

The insert-eject may have dried grease that needs to be removed and re-lubed, but it is usually the lead screw that has dried out grease. The hard grease causes the head to continually seek the start

Yes, Spinrite is good. I used it heavily in the 1980s and early 1990s, and we use it from time to time at LSSM. However, one important thing to consider is the disk format. I choose that word

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

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

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

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

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

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.

> Hi Wolfgang Schraml, > > From one very happy HP 3545A owner, thank you very much for your detailed > post. > > Kind regards, > Terry ZL1NOW > >

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

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.

Subject line says it all - expected coverage is 2-18 GHz but no other data can be found.

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"

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

Yup. Got it. Thanks. DaveD KC0WJN [email protected]> wrote:

Probably a custom designed part ?

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

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.