Bonjour, Michel. Its like 3 years or so passed from first implementation of an AGM-65 seeker on the channel. I see, that you've earned a bunch of equally intersting stuff to reverse, but Im sure that im not the only one waiting for a "sequel" about maverick :). Please, continue to work with this piece of an engineering mastery
Lovely bit of over engineered test equipment. Thank you for the look inside. Standard DIL ICs were just coming in as DTL was going out. I don't think I saw more than a couple in all my 50 years tearing down stuff.
*Vintage Height Encoding Height Test Set: A Deep Dive into its Binary-Based Altitude Measurement* * *0:00:05** Introduction:* The video introduces a vintage height test set that uses a binary-based Gillham code, similar to Gray code, for height encoding. * *0:00:17** Gillham Code:* This encoding system changes only one bit when the height changes by 100 feet. * *0:00:22** Transponder Use:* The binary coding is used for transponders, with 11 indicators displaying the state of each bit (LSB to MSB - D2). * *0:00:37** Input and Power:* The unit features an encoder input, a power supply connector, an on/off switch, and a tone that activates above 1000 feet, with a small loudspeaker. * *0:00:55** Altitude Display:* The altitude is displayed using five Nixie tubes. * *0:01:08** Incompatible Cables:* The included cables have incompatible connectors (6-pin male) for the unit. * *0:01:31** Air Data Computer Connection:* The unit is designed to connect to an Air Data Computer or a specific sensor, like the automatic pressure altitude digitizer shown. * *0:01:42** Altitude Digitizer:* The example digitizer has a limited range of -1,000 to 20,000 feet and uses only nine bits, while the main unit uses 11 bits. * *0:02:06** Elliott Air Data Computer Module:* A height module for an Elliott Air Data Computer is shown, featuring a digital encoder with a calibration seal. * *0:03:08** Internal Components:* The video reveals the internal components, including a power supply transformer, Nixie tubes with drivers (8T01B, date code 72), and multiple circuit boards. * *0:03:55** Board Analysis:* The first board contains a monostable (74121), an unknown part (930), and a DTL Logic (946). Two identical boards have op-amps or comparators (date code 70), with six circuits likely serving as the front end for the 11 input bits. * *0:05:14** DTL Logic:* Another board features SMD 946 components, indicating DTL logic, along with various logic ICs (date codes 70-72) and obscure parts (N8241A). * *0:05:52** Reverse Engineering:* The next step is to reverse engineer a section of the last board, which includes an op-amp or comparator and three transistors, to identify the six inputs and corresponding connector pins. * *0:06:21** Front End:* This section is identified as the front end for one bit. I used gemini-1.5-pro-exp-0827 on rocketrecap dot com to summarize the transcript. Cost (if I didn't use the free tier): $0.0181 Input tokens: 11916 Output tokens: 642
Bonjour, Michel. Its like 3 years or so passed from first implementation of an AGM-65 seeker on the channel. I see, that you've earned a bunch of equally intersting stuff to reverse, but Im sure that im not the only one waiting for a "sequel" about maverick :). Please, continue to work with this piece of an engineering mastery
Lovely bit of over engineered test equipment. Thank you for the look inside. Standard DIL ICs were just coming in as DTL was going out. I don't think I saw more than a couple in all my 50 years tearing down stuff.
Hello, c'est beau les tubes Nixies :)
As per thankyou Michel , good score maybe handy in the future.
So ein Gerät gehört in jeden Haushalt.
*Vintage Height Encoding Height Test Set: A Deep Dive into its Binary-Based Altitude Measurement*
* *0:00:05** Introduction:* The video introduces a vintage height test set that uses a binary-based Gillham code, similar to Gray code, for height encoding.
* *0:00:17** Gillham Code:* This encoding system changes only one bit when the height changes by 100 feet.
* *0:00:22** Transponder Use:* The binary coding is used for transponders, with 11 indicators displaying the state of each bit (LSB to MSB - D2).
* *0:00:37** Input and Power:* The unit features an encoder input, a power supply connector, an on/off switch, and a tone that activates above 1000 feet, with a small loudspeaker.
* *0:00:55** Altitude Display:* The altitude is displayed using five Nixie tubes.
* *0:01:08** Incompatible Cables:* The included cables have incompatible connectors (6-pin male) for the unit.
* *0:01:31** Air Data Computer Connection:* The unit is designed to connect to an Air Data Computer or a specific sensor, like the automatic pressure altitude digitizer shown.
* *0:01:42** Altitude Digitizer:* The example digitizer has a limited range of -1,000 to 20,000 feet and uses only nine bits, while the main unit uses 11 bits.
* *0:02:06** Elliott Air Data Computer Module:* A height module for an Elliott Air Data Computer is shown, featuring a digital encoder with a calibration seal.
* *0:03:08** Internal Components:* The video reveals the internal components, including a power supply transformer, Nixie tubes with drivers (8T01B, date code 72), and multiple circuit boards.
* *0:03:55** Board Analysis:* The first board contains a monostable (74121), an unknown part (930), and a DTL Logic (946). Two identical boards have op-amps or comparators (date code 70), with six circuits likely serving as the front end for the 11 input bits.
* *0:05:14** DTL Logic:* Another board features SMD 946 components, indicating DTL logic, along with various logic ICs (date codes 70-72) and obscure parts (N8241A).
* *0:05:52** Reverse Engineering:* The next step is to reverse engineer a section of the last board, which includes an op-amp or comparator and three transistors, to identify the six inputs and corresponding connector pins.
* *0:06:21** Front End:* This section is identified as the front end for one bit.
I used gemini-1.5-pro-exp-0827 on rocketrecap dot com to summarize the transcript.
Cost (if I didn't use the free tier): $0.0181
Input tokens: 11916
Output tokens: 642
Don't know anything of NPL but Technitron was based in Camberley, Surrey.
has anyone seen that episode of dexters laboratory where his house stands up and is suddenly a giant gundam robot 😂 i genuinely worry with this guy😂
I built one unit like that with an arduino nano...
Sir can u pls give ur mail id:
My email is on the description page on my channel
Michel.Waleczek at gmail.com
@lelabodemichel5162 thank u.