It is much more than interesting. You learn a lot, your enthusiasm captivates the viewer and the videos give a glimpse into a world of measurement that not everyone is able to experience.
I have a Polarad ZPV, which is the digital version (with RS-488 control) of this ZPU. It was "white-labeled" by R&S in the 1990s. It does a lot more onboard, but is essentially the same device with much more investment in digitization.
I think it was be used in manufacturing (tuning) direct conversion transceivers with IQ channels.Such a devices decrease amount of RF filters and amplifiers - because of LOW IF. You can tune for example shapeshifter , but the beeter choice is a panoramic indicator with CRT to see frequency and phase responses.
Oh, wow, that HP 8405a looks remarkably similar!!! Auto tuning receiver, two channels downconverted to 20kHz, 2 IF outputs and 2 recorder outputs on BNC, and so on. Its a much larger beast, though.
And that HP 11536A might or might not work with the probes of the ZPU, it's hard to say. The problem - for both the R&S and HP injection adapters - that if you try to buy them separately, you face absurd proces. I would easily have to pay more than I did for the entire instrument....
Heij Rudi! I am a newbie to old electronics, I know enough not to unalive myself but not enough to repair my measuring gear. My new old Grundig RV55 gives me grief, when it´s powered up the needle hovers slightly above zero. In any range, no change when it´s warmed up. I treated the switches with Teslanol T6 and changed the EL86, it made weird noises. There is some switching noise when I change ranges. I´d like to know if You have a theory what that could be, if You would kind of guide me a little with this? I have the user instructions for it with schematic but it´s got seven trimpods inside- I guess they are for alignment but I don´t know what they do and didn´t find anything in the web. I belive a trained tech would spot what they do, I´ain´t that and didn´t find help yet, either. If anyone is willing to help it would be greatly appreciated.
Hi LaLa, It Would be a nice device to get working, this Grundig RV55. But I do not know it myself. My top would be to go to radiomuseum.org (you will need to register), and there you can find two entries for this device, and one has a three-page description of its workings (apart from the schematics). It's in German, but these days, there are good translation options on the web... Good luck!
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Excellent introduction to the subject! And lots of valuable explanation of how it all works. Simply great!
And the same to you: thanks for the nice words! It was fun to dig into this device, it was really new to me.
Again I was glued to the screen. A very fascinating video! Thanks.
Thanks for the positive words! I make these videos in the hope that some people, like you, do find them interesting ;-)
It is much more than interesting. You learn a lot, your enthusiasm captivates the viewer and the videos give a glimpse into a world of measurement that not everyone is able to experience.
I have a Polarad ZPV, which is the digital version (with RS-488 control) of this ZPU. It was "white-labeled" by R&S in the 1990s. It does a lot more onboard, but is essentially the same device with much more investment in digitization.
I actually own the Hewlett-Packard version of this device. Was originally owned by us Navy before it came into my possession.
Very nice 😊
Discussion also applicable mostly to the HP 8405 VVM. Thank you for the video.
I think it was be used in manufacturing (tuning) direct conversion transceivers with IQ channels.Such a devices decrease amount of RF filters and amplifiers - because of LOW IF. You can tune for example shapeshifter , but the beeter choice is a panoramic indicator with CRT to see frequency and phase responses.
Great, i also reallly wanted vector voltometer, so i hunted hp 8405a. 11536A maybe compatibile with yours R&S, but i guess it is not kosher :D
Oh, wow, that HP 8405a looks remarkably similar!!! Auto tuning receiver, two channels downconverted to 20kHz, 2 IF outputs and 2 recorder outputs on BNC, and so on. Its a much larger beast, though.
And that HP 11536A might or might not work with the probes of the ZPU, it's hard to say. The problem - for both the R&S and HP injection adapters - that if you try to buy them separately, you face absurd proces. I would easily have to pay more than I did for the entire instrument....
Well now, we had color TV and high fidelity when you were a lad. Late sixties
Heij Rudi! I am a newbie to old electronics, I know enough not to unalive myself but not enough to repair my measuring gear. My new old Grundig RV55 gives me grief, when it´s powered up the needle hovers slightly above zero. In any range, no change when it´s warmed up.
I treated the switches with Teslanol T6 and changed the EL86, it made weird noises. There is some switching noise when I change ranges.
I´d like to know if You have a theory what that could be, if You would kind of guide me a little with this? I have the user instructions for it with schematic but it´s got seven trimpods inside- I guess they are for alignment but I don´t know what they do and didn´t find anything in the web. I belive a trained tech would spot what they do, I´ain´t that and didn´t find help yet, either. If anyone is willing to help it would be greatly appreciated.
Hi LaLa, It Would be a nice device to get working, this Grundig RV55. But I do not know it myself. My top would be to go to radiomuseum.org (you will need to register), and there you can find two entries for this device, and one has a three-page description of its workings (apart from the schematics). It's in German, but these days, there are good translation options on the web... Good luck!