Tiny Tube Surprise Viewer Mail!
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- Опубликовано: 18 апр 2024
- Everybody loves themselves some Viewer Mail. Enjoy!
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Hello Dear FRAN!!!
This first BOARD with 7-Segment TUBE Displays is used in a VHF Transceiver - Aircraft Communicator!!! I maintain this equipment!!! The Manufacturer is Collins and the Model VHF-251!! It's a shame that I'm at home at the moment, in the company where I work we have some of these VHF Tranceivers!!! Aircraft Communication uses the commercial frequency range 118 MHZ to 136 MHZ!!!!
Thank you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I was about to offer the idea that it was an aircraft comm radio (118.00 -> 136.975); you beat me to it
So the rightmost digit is only ever 0 or 5 -- maybe why there are only 4 drivers needed?
@@BixbyConsequence Pretty sure the last digit can be 0,2,5 or 7. However, there are only four drivers, because the 1st digit is always 1.
@@Boffin55 Duh! Lol.
Wow, this is the vid I've been waiting 30+ years for. I worked on military equipment in the mid to late 80's. Much of the equipment I worked on had these type of read outs except they could display both letters and numbers. I never knew what these were called. They are beautiful displays. I wish I had a full set of them to play with and now that I know their name maybe at some point I will.
Fran, these two holes on the board, the hole on the left is for passing the on/off control and volume control, the second and larger hole is for passing the frequency change control, the switching is mechanical
I saw the thumbnail and thought "3015-F" :) I've not seen one since the 70's.
I made a clock with six of those 3015F's in 2021 and it's running happily ever since! It includes six 74HC595's and an ATTINY85 to control it all. I still have a couple of factory-made pcb's left
I did exactly the same, but quite a few years earlier. Remarkable, unique, and wonderful display device!
Very ‘Six Million Dollar Man’!
Fran: _"...it's only going to count 0-1-2-3..."_
*_"That's amazing. I've got the same combination on my luggage."_*
- SPACEBALLS [1987] 😉
Nice displays! Over the years I have decommissioned and parted out old equipment especially medical devices and saved the numerical indicators and other components such as CRT tubes. I also scored a lot of NOS nixie tubes including some large ones with the red contrast coating. Sadly freight is prohibitive these days, I sure would love to be able to send all this gear to you for your research and projects, hate to think it will most likely end up in landfill one day.
I have a big PCB with 12 of these. 2 are in a green package instead of black. Came from a 1975 Deckel milling machine control cabinet, along with nixie tube readouts for x, y and z.
They are cool, have seen them in B737 IRS units there is also the photo transistor for auto brightness.
45 years ago, I wrote firmware for a digital counter that used those incandescent displays… :)
Cool display.
Lovely little minitrons! DIP16 sized cuteness.
Damn, those are pretty cool.
Nothing like old tech to make your day!
I used to get gas at a Gulf station where the pumps used these displays
Thank you dear fran, always enjoyable. Blessings
Hello Dear FRAN!!!
The communication frequency for example: 118.00 MHZ to 135.97 MHZ!!!! That's why there is a comma after the third digit!!!!
grommet ground grommet ground grommet ground
i like the sound of that
I've always wondered why the original designers of the 7447 decoder didn't put the "tails" on the 6 and 9 numerals to make them more aesthetic..
Nice gift....so, what ELSE was in the box ????
I honestly think it was because of the high current draw of LED displays. Less segments meant lower power consumption over time and more reliability.
Trying to think of a use case for that many digits with the first two being limited like this, first thing I thought of is a channel display for aviation. The digits required are going to be limited to 11X.XX 12X.XX and 13X.XX
Exactly right, aviation VHF comms would be on 118 to 137 MHz
Great thinking!
I thought exactly the same. I'm guessing the display is for an aviation VHF radio capable of tuning to only 50KHz (0.05MHz) increments so the right most digit can only alternate between 5 and either 0 or blank, consistent with an older scheme; the newer scheme halves the steps to 25KHz, requiring an additional display digit.
@@anthonyx916 I have seen some use the 25kHz spacing without an extra digit through rounding the 5; it would count 0,3,5,8,0...
@@Rokreder 0,2,5,7
I bet it's an RF aircraft frequency display. Aircraft frequencies are 110-13? mhz with decimals after.
I thought they would be VFD numbers but it appears to be incandescent filaments. Cool.
please enable automatic subtitles
I made a short RUclips video clip operating one of those 3015-F Minitron displays. I was preparing to drive them with low-side fets before seeing that I could drive them with a regular CMOS logic IC. I was amazed at how little current they actually require to run.
It looks like the display PCB in the Rockwell Collins VIR-351 navigation receiver.
Or the VHF-350?
@@jeffreyyoung4104 But did that version have displays?!
Definitely a VHF variant (matches the frequency range 11x.xx to 13x.xx MHz) so a VHF-251?
@@Rokreder Correct.
@@simongenius1975 Sorry, I got my numbers wrong.
Fran: You never cease to amaze me. Well done Ma'am
I LIKED THIS 🙂
Neato!
I have a few of these, I believe they came from a 'bargain pack' of random displays from Tandy electronics. (as 'Radio Shack' was called in Australia)
I've toyed with making a clock from them, but as I cannot get any replacements should one die - as all incandescents do in short order, I've been reluctant to do so.
I remember those bargain packs, they also had them with random LEDs in. Good value for a kid with limited pocket money; the contents of my component bin dictated my project designs instead of the other way around. I've never gotten one of these displays, though.
(And it was called Tandy here as well in the Netherlands).
Maybe something that won't see such long operating time like a calculator or something you can connect to a computer or microcontroller and make a game to work with it or something.
a clock with a timed switch button or motion detection?
Love when you showcase these unique old dosplays
😅💚🌍🌴🐪☀️
we can always count on you, fran!
nice!
I am guessing the carry and borrow are not hooked up and every digit was originally driven sepeately.
I have some displays like this.
Left digit is either 1 or off so 7447 is not needed i was gonna guess
did you ever get the vintage magic eye sensor I sent in ?
Might this be from a radio with a narrow frequency range…? Aviation radio…?
Collins aircraft comm / nav receivers
Merci Fran. Du Maroc 🐪☀️💚🌴
A Fran vid: just what I needed to forget about my day and watch in bed before sleep. Where u been or is RUclips being silly to me?
Love U
I came here for the cool gadgets and ended up getting ASMR triggered by your voice and the way your fingers were delicately handling the small items like those small displays on the first item you were showing. I wasn't expecting that; it just happened. Sorry if it sounded weird as I don't mean anything by it. I know some people get weird with it.
very cool display Frannie, the frequency range & photocell automatic dimming would be typical in aviation vhf NAV/COM devices as others mentioned. wouldn't air COM require 3 decimal places 118.000 Hz to 135.975 MHz for 760 channels?
nevermind, I figured it out, the old radios used 25kHz spacing with only 2 decimal places that ended in 0, 2, 5, or 7, & the missing 3rd digit could only be 0 or 5 so 118.00 = 118.000
118.02 = 118.025
118.05 = 118.050
118.07= 118.075
118.10= 118.100 etc
Is that Fran soldering in THE LAB???
Old electronics are weird
Hi Fran Thank you for your videos I enjoy them very much.
I am trying to wire up a 12VDC motor that has a zip tie on the shaft and a limit switch on each side of the motor.
There is a door bell switch I want to be able to push and have the motor turn making the zip tie leave the one limit switch and go 180 degrees to hit the other limit switch making the motor instantly reverse and the zip tie go back to the first limit switch and shut off.
My power comes from a Milwaukee cordless power tool battery. I have three 5 pin relays but I think I might need a latching relay of some kind.
Any kind of explanation on how to wire up a circuit to make this work would be greatly appreciated.
Making a resetting target for a slingshot that makes a flash pot explode with a big puff of smoke.