Yancer Mechanical TV Amp Schematic
 

At today's ETF Zoom call someone asked about schematics for Peter Yancers Mechanical TV Receiver and Camera amplifier schematics

Attached is the receiver schematic and associated parts list

Peter Yanczer Mechanical Camera Amp Schematic and associated parts list

For us mechanical television dummies is there a build article somewhere, at least for the mechanism?

One DIY example: https://www.cool386.com/televisor/televisor.html

Peter Yanczer's book Mechanics of Television

https://www.earlytelevision.org/pdf/...television.pdf

Peter Yanczer's Camera build instructions which go with the Mechanical Camera Amp described above

https://www.earlytelevision.org/pdf/...camera_kit.pdf

I sent a copy of the corresponding Mechanical Receiver build to ETF but it seems not to be on their site. I have the PDF that I scanned if anyone is interested.

Go to the ETF Search page and search for Yanczer
Peter Yanczer's web site was cloned to ETF after he passed.

https://www.earlytelevision.org/search.html

Another resource in UK. Narrow-bandwidth Television Association
http://www.nbtv.org/

The NBTV members sales page. I'm not sure of how current but it gives an idea of parts you might need and their associated prices.

http://www.nbtv.wyenet.co.uk/The%20club%20Shop.pdf

Julian started this and I chimed in with my complete Yanczer kit. A fun time with this. The schematics are great and thanks. I also mentioned a Televisor science fair kit which I have for demonstration but currently not avaliable.This one uses the NBTV CD disc for images. It comes with a burned in test chart.

https://mindsetsonline.co.uk/shop/televisor/

Pages 79-82 in Peter's "Mechanics of Television" book (PDF link above) show a typical Receiver amplifier design schematic and a description of it. Its similar to the Receiver Kit Amplifier.

I found these 12 year old Nipkow Mechanical TV camera experiments on youtube

they're on troysvisualarts youtube

This is just one guy among many I found on youtube building their own variation of a mechanical camera. I don't know Troy. Interesting and educational from camera build concepts viewpoint. Part 2 etc will start automatically after the previous video

First is a camera build using a multiple CD plastic case painted black as the TV cabinet, an LDR for image sensor and a 35 mm camera lens. With LDR (Light Dependent Resistor) the resistance changes according to the intensity of light. Try mentioned having purchase a clear photo transistor which is more sensitive but didn't use it in parts 1-7. He may have use a photo transistor in the later camera/monitor in part 75 but I haven't watched all 75 videos.

Camera build Part1
https://www.youtube.com/watch?v=j0Gn3VSr_wQ

mechanical camera part 2
https://www.youtube.com/watch?v=baHgZXjUuv4

mechanical camera part 3
https://www.youtube.com/watch?v=BUYdSLGTljk

mechanical camera part 4
https://www.youtube.com/watch?v=pxVphfOLTng

mechanical camera part 5
https://www.youtube.com/watch?v=TTGGOSZVl1U

mechanical camera part 6
https://www.youtube.com/watch?v=yguYWDtOrio

mechanical camera part 7
https://www.youtube.com/watch?v=3xn8jQOEaX4

Jumping ahead a couple of years he experiments with a camera / monitor combination

32 line NBTV mechanical TV camera/monitor(Part 75)
https://www.youtube.com/watch?v=Pw2nf29unKE

The most difficult problem to solve in camera build is which optical device and type to use. If you search NBTV.org Forum area for S1223 you'll find some lengthly discussions on using Hamamatsu S1223-01 photodiode versus the BPW34.

A side note NBTV shopsales lists the S1223-01 at over 10 UK pounds plus shipping. You need to join NBTV for about $5 to purchase from them. Their shop is a source for a lot of components for building a mechanical camera and/or receiver. The S1223-01 photodiode is also available online at Newark for $10.73 with standard shipping for all orders under $150 at $9.99. You can find the BPW34 selling various locations on ebay for under $3 with free shipping.

The photodiode used in Peter Yanczer's mechanical camera kit seems not be be available anywhere.

Another NBTV 32 line receiver build link with a lot of written discussion by LabGuysworld (Richard N. Diehl) on youtube. He goes into a lot of detail in the design and construction of a mechanical TV receiver. He includes build info for either B/W or color.

LabGuy's World: NBTV - 32 Line BIG Televisor Project
https://labguysworld.com/NBTV_BigTelevisor_001.htm

I downloaded a software player from the NBTV website "freenbtv". The program supposedly takes many if not all formats based on dozens of parameters. I was able to select enough correct parameters to get a picture even though the picture kept moving on the screen and was rotated 90 degrees to the left. I took a screenshot of the parameters I chose for later analyses. I created the 24x24 video using a program called FFMPEG. It takes a sequence of jJPEG images and assembles the video in number order.

Some more tests image of Indian and image of letter "R". The Orange colored Indian is displayed on my Mechanical receiver (rotated). Bottom left FreeNBTV input file with box around selected area, Bottom right what FreeNBTV thinks the output will look like. My Mechanical receiver is not syncing. The disk spins momentarily stops then spins again. The frames are moving off frame horizontal as well as vertical. The "R" test came out upside down after rotating 270 degrees? The top of the "R" looks almost like the bottom of the "R". I need to try an animated video. NBTV has a demo video with flower petals rotating. I converted it to 24x24 and ran it on the Big Picture software but not yet on FreeNBTV and out to my Mechanical receiver.

Initial settings for Yanczer 24 pixel x 24 line Mechanical Receiver

To get FreeNBTV software
1- go to to website NBTV.ORG
2- select FORUM tab
3 -Top right search type in freenbtv
4 - you have over 100 hits, select 1st one
5 - go to page 4
6- about 8 threads down is a download link for version 4.1
Don't get freenbtv 4.0 2 threads up above this one

This thread is:
by smeezekitty » Thu Sep 01, 2022 6:28 pm
The text states:

The zip file contains both the source and a Windows installer as before (Windows 7 or newer required)

Attachments
freenbtv_0_41.zip
(10.88 MiB) Downloaded 243 time

Note: the download file is a zip file which can be extracted using MS Windows file explorer

Hi to all,

not Yanczer stuff, but mechanical TV indeed.

UK shop Mindsets which is connected to Manchester University brought out over a decade ago a cheap kit to build a miniature replica Baird Televisor.
i've received a Mail saying that it's back in stock for Xmas 2023.

The kit includes a cardboard TV cabinet, a motor, a high-bri LED, electronics to amplify & regulate the motor's rotation + a CD with NBTV content. Ch1 is used for "video", CH2 contains Sync.

https://mindsetsonline.co.uk/shop/televisor/

Best Regards
jhalphen
Paris/France

Thanks for the update Jerome. I ordered one to replace my previous one which I dropped and the plastic front fractured. They are a fun "science fair" demonstration of the concept and tells the story. They work fine with the included CD...if you still have a CD player around. The best would be if Darryl had made a converter for this format to get live tv to view.

I too ordered one.

Does the original Aurora convertor, which does do mechanical,
work for this format? The manual lists the Baird Televisor as 30 lines
progressive 12.5 Hz. But there are tons of other nearby formats.

Not sure but info below from Radiomuseum. Needs confirmation. I do not have the Aurora specs.

Baird Televisor Kit (Retro);
18 cm/7" Nipkow Disc with 750 rpm, 32 holes (lines) 12.5 frames/sec., 3 V motor, 6 LED´s, stereo jack for source, DC jack. CD-ROM as manual, sold in Museum stores etc.

Edit: Page 27 of the manual shows 32 line NBTV. Not sure if this is the same as the kit. It may need a reference signal shown elsewhere in the .pdf. https://www.tech-retro.com/aurora-de...nual%204.0.pdf

The kit arrived and is problematic in this new version. Speed/sync are not good. Speed is too high for sync at the low end. The new 3 tab lens mount is not good compared to the original round lens mount. The instructions are from the original build...not this version. I have a note to Mindset and standing by for a response. A review after they respond.

I played more with it. Its definitely Aurora mechanical scan type 4, 30 Hz NBTV. This was determined from the number of cycles on the sync disk (32) and the frequency of the signal across the LED on the test pattern.
The sync disk has one bar missing which will allow generation of horizontal (frame) sync (the fast/slow direction is the reverse of NTSC , 405, and other electronic).

Viewing the LED signal on the test card says it does have sync.

I tired to see if sync is bothered by room light ... apparently not, based on
the test pattern. Probably IR led/photocell.

I then remembered that somewhere I read that the CD had each little track repeated twice with reverse polarity, because CD players have no polarity spec. I noticed no difference when trying to sync various tracks.

Later today I will rip the CD to computer files and investigate further.

I will also try the Aurora. The Aurora is a pain to set, the manual is not clear on exactly how the buttons work and I don't want to lose the settings needed to make my real electronic Marconi 702 work right.

I'd love to see a schematic ... does it have DC restoration for the sync?

I am going to move this to a new thread to keep the Yanczer discussion on track. Dave A