This is a Shibaden HV-13 vidicon closed circuit camera from around July 1965. This camera would of been used for closed circuit security or industrial equipment monitoring back in the day. I won this camera off Ebay recently, it came near complete only missing the lense which would obviously be not good for the vidicon tube because of constant exposure to the tube, plus the tube had smudge marks on it. The camera sort of works, I fitted one of my Sony lenses to the camera and fired it up, the tube on a couple of occasions gave a faint blurred picture but mostly no picture which I guess would be caused by being constantly exposed to light without as it had no lense. It is otherwise mostly functional and would most likely just need a tube changed in order to make it operational. Cosmetically it is in excellent condition with the exception of the rubber rotary controls at the back which are worn and cracked. Nice and clean on the inside too. This camera makes a nice addition to my collection and is now my oldest video camera. I intend on getting this camera operational once I have the technical know-how to restore it and a suitable replacement vidicon tube.
Here below are a number of pictures of the electronics inside the camera and the coil assembly with the 1 inch vidicon tube in it:
I recently had a crack at getting this camera to work after gaining a lot of knowledge and experience with camera electronics over the past year and after some tinkering I got this camera to work, well sort of and for a brief period of time! I pretty much tested the scanning stage and got good horizontal and vertical output waveforms and tested the voltages on the tube and found they were considerably way out. I replaced a few high voltage capacitors but it didn't make a difference. I decided to just power it up anyways and fiddled with the target and beam current and to my surprise I got me a picture!!! It was far from perfect as I had diagonal lines, the picture had tunnel vision and there are white spots in the image, but apart from that the clarity was excellent, the picture is sharp crisp as that of a broadcast B&W image, the contrast was perfect which blacks are blacks and whites are whites, the linearity was pretty good too. The next day disaster happened, I lost the image again and am back to square one, so I tested the board and found somewhere in the middle the video signal is lost so need to check components around that region for faults which I'll do sometime soon so stay tuned for updates. Anyways here below are some pictures and a video I made from my mobile phone.
Video output without picture signal
Horizontal scan wave
Vertical scan wave
Video output signal with picture
Off screen shots, as seen there's rolling diagonal lines, white spots and the picture has tunnel vision but otherwise sharp well contrasted picture. The noise is only due to the camera's cover being off.
This is an off screen video made on my mobile phone which shows the camera in operation and I talk about the camera and its restoration during the first few minutes
I have been doing further work on this camera as this camera has since had some further problems. For starters one of the transistors went faulty and I lost the video signal, hence no picture so I had to get a suitable replacement. And these transistors were not replaceable with the ordinary type of modern transistors you get at Jaycar Electronics stores and Futurlec, these were the early germanium type which can only be directly replaced (without modificaion) with germanium type transistors. So I emailed my TV collector friend John and he kindly listed me the suitable more common germanium transistor equivalents for replacement of the faulty one and I ordered one off Ebay in UK and replaced the faulty one with it and bingo, it works perfectly!!! :D So now I got the picture back.
Then there's the other issue to contend with which is the rolling slanted lines in the picture. So I thought perhaps try another tube so I removed the tube then to my horror the target contact in the yoke that touches the target ring broke off, so once again no picture. I then soldered a little wire to the back of the target contact and to the solder joint where the target lead connects to and that fixed the problem, well sort of. I did get the picture back once again but the target ring on the tube is not making solid contact with the contact so I have to slap the front of the camera to make it contact. So I will have to look into how to make the target ring on the tube firmly lock onto with the contact.
Video of my camera up and working again after replacing a faulty transistor in the video circuit
Camera working again after transistor replacement
Here's a direct video feed from the camera's video output, as seen there's the rolling slanted lines and white spots but otherwise a good sharp B&W picture
As seen the target contact that the target ring on the vidicon tube touches has broken off so I soldered a small wire from the back of the contact to the solder joint the target lead is soldered to
Picture is now back once again though target ring isn't making solid connection with the contact so a thump at the front is required for it to make contact
A video of the camera working once again, I discuss in this video about the broken target contact
Now back onto the rolling slanted lines issue. I started on investigating into the cause of why I'm getting those lines in the picture, it was suggested I check the filtering of the power supply and also the output video signal. So firstly I checked all the voltages coming from the power supply board and found nearly all of them to be AC peek to peek voltages, as I don't have the manual for this camera I don't know if it's right or wrong to have AC voltages. During the testing I came across something of real interest, one of the ouputs was a sawtooth wave that has a time duration the same as composite video and it appears to noisy as there appears to be duplicate sawtooths moving out of phase so I wonder if that might have anything to do with those lines?
The next thing I checked was the composite video output signal and I saw within the video signal a moving clipped sine wave which I believe is causing those slanted lines scrolling down the picture. So it looks like somewhere in the circuitry a sine wave is somehow getting injected into the composite video signal and I wonder where and I wonder if bad filtering might have anything to do with it?
Sawtooth wave with multiple sawtooths moving out of phase
Video signal with a moving clipped sine wave in it, likely cause of those rolling slanted lines in the picture
Not yet sorted out the problems with the camera as of yet but have since made a couple of videos from it, one which can be seen on my vintage camera collection in operation video on YouTube from 1:26 to 3:21 and I made a near 13 minute video of this camera filming around my bedroom which can be seen below: