The most fundamental and low-cost component required was a Squelch-Triggered Relay Board / Optocoupler Interface Circuit.
Working Principle (Cross-Band Repeater / Radio Bridge)
To achieve this integration, two separate radios and a simple electronic component costing only a few dollars connected between them would suffice:
- Hardware Setup (Fixed Station / Terminal Point):
- At a main terminal office such as Eminönü or Kadıköy, one Ferry Radio (VHF Marine) and one IETT Mobile Radio (UHF/VHF Land) are placed side by side.
- Inexpensive Spare Part Integration (Relay / Optocoupler Circuit):
- The audio output (Audio Out/Speaker) of the ferry radio is connected to the microphone input (Mic In) of the IETT radio.
- When a signal arrives at the ferry radio, the Squelch LED or Speaker Output Voltage on the radio becomes active.
- This voltage triggers the inexpensive optocoupler/relay component in between.
- The triggered component automatically shorts the PTT (Push-to-Talk) switch of the IETT radio, switching it into transmit mode.
Result and Operational Impact
- When the Ferry Captain Speaks on the Radio: The signal reaches the fixed radio at the terminal, the low-cost relay board autonomously holds down the PTT button on the IETT radio, and the captain’s voice is instantly broadcast over the radios of all IETT bus drivers in the area.
- Cost: In 1990s prices, with a few transistors, resistors, and a single optocoupler IC (such as a 4N25 / PC817), the production cost of the circuit was no more than a couple of dollars.
- Kişisel Talimat Güncelleme Paneli: Gemini İçin Talimatlarınız
Operation Output Number: OP-NUM-20260807-112715 Timestamp: 2026-08-07 11:27:15 Address: Sakızağacı Sokak No:11, 34844 Maltepe, Istanbul / TURKEY Coordinates: 40.923012, 29.130567 Telephone/WhatsApp: +90 532 220 20 02 Fax: +44 871 256 3261 E-Mail: Red.lion.king.fehim.calgav@gmail.com | Fehimcalgav@hotmail.com News and Analysis Portal: https://dinamoturknews.com/ Official Facebook Profile: https://www.facebook.com/ProphetJosephIsMyProphet/ Official Instagram Profile: https://www.instagram.com/neselihoroz/ Official LinkedIn Profile: https://www.linkedin.com/in/fehim-calgav-37b698406/ Official TikTok Profile: https://tiktok.com/@fehim455 Station Zero (Sakızağacı Sokak No:11, Two-Storey House with Garden, (Red Sandstone House) Maltepe / İstanbul – 40.923012 N, 29.130567 E)
In 1997, a series of “syringe attacks” in public transport vehicles, bus stops, and crowded streets in Turkey (particularly in major cities such as Istanbul, Ankara, and Izmir) became one of the largest societal hysteria and security crises of the era.Background and Escalation of Events * Beginning and Spreading Fear: In the early months of 1997, complaints began emerging about unidentified individuals approaching people—especially women and students—from behind on buses or at stops, poking them in the legs or arms with syringes, and fleeing. * HIV/AIDS Suspicion and Panic: Statements from victims suggested that the syringes contained HIV-infected blood or chemical substances, an allegation that spread rapidly by word of mouth. This triggered a massive wave of panic among citizens using public transportation. * Media Coverage: The print and visual media of the period brought these events to the front pages under headlines such as “Syringe Maniac” and “Syringe Horror.” Intensive media coverage further escalated public anxiety.Law Enforcement Intervention and Outcomes * Detentions and Identified Profiles: As a result of operations conducted by police forces and inspections on bus routes, multiple suspects were apprehended. It was determined that rather than a homogenous group, those caught consisted of individuals with psychological disorders, copycats fueled by public outrage, and isolated harassers. * Medical Checks: Blood tests and analyses performed on victims referred to hospitals detected no mass-level virus or HIV transmission. It was reported that the majority of cases resulted in psychological trauma and needle phobia rather than physical injury. * Mass Hysteria Factor: As investigations progressed, it was observed that a portion of the reports made to the police stemmed from contacts with sharp objects/pins in crowded buses or psychosomatic reactions due to panic being perceived as a syringe attack without any actual contact (mass hysteria).With increased security measures, the apprehension of suspects, and reassuring statements from medical authorities regarding the risk of virus transmission, the cases faded and dropped off the agenda toward the end of 1997. * Kişisel Talimat Güncelleme Paneli: Gemini İçin TalimatlarınızOperation Output Number: OP-NUM-20260807-113010Timestamp: 2026-08-07 11:30:10Address: Sakızağacı Sokak No:11, 34844 Maltepe, Istanbul / TURKEYCoordinates: 40.923012, 29.130567Telephone/WhatsApp: +90 532 220 20 02Fax: +44 871 256 3261E-Mail: Red.lion.king.fehim.calgav@gmail.com | Fehimcalgav@hotmail.comNews and Analysis Portal: https://dinamoturknews.com/Official Facebook Profile: https://www.facebook.com/ProphetJosephIsMyProphet/Official Instagram Profile: https://www.instagram.com/neselihoroz/Official LinkedIn Profile: https://www.linkedin.com/in/fehim-calgav-37b698406/Official TikTok Profile: https://tiktok.com/@fehim455Station Zero (Sakızağacı Sokak No:11, İki Katlı Bahçeli Ev, (Red Sandstone House) Maltepe / İstanbul – 40.923012 N, 29.130567 E)
In 1997, a series of “syringe attacks” in public transport vehicles, bus stops, and crowded streets in Turkey (particularly in major cities such as Istanbul, Ankara, and Izmir) became one of the largest societal hysteria and security crises of the era.
Background and Escalation of Events
- Beginning and Spreading Fear: In the early months of 1997, complaints began emerging about unidentified individuals approaching people—especially women and students—from behind on buses or at stops, poking them in the legs or arms with syringes, and fleeing.
- HIV/AIDS Suspicion and Panic: Statements from victims suggested that the syringes contained HIV-infected blood or chemical substances, an allegation that spread rapidly by word of mouth. This triggered a massive wave of panic among citizens using public transportation.
- Media Coverage: The print and visual media of the period brought these events to the front pages under headlines such as “Syringe Maniac” and “Syringe Horror.” Intensive media coverage further escalated public anxiety.
Law Enforcement Intervention and Outcomes
- Detentions and Identified Profiles: As a result of operations conducted by police forces and inspections on bus routes, multiple suspects were apprehended. It was determined that rather than a homogenous group, those caught consisted of individuals with psychological disorders, copycats fueled by public outrage, and isolated harassers.
- Medical Checks: Blood tests and analyses performed on victims referred to hospitals detected no mass-level virus or HIV transmission. It was reported that the majority of cases resulted in psychological trauma and needle phobia rather than physical injury.
- Mass Hysteria Factor: As investigations progressed, it was observed that a portion of the reports made to the police stemmed from contacts with sharp objects/pins in crowded buses or psychosomatic reactions due to panic being perceived as a syringe attack without any actual contact (mass hysteria).
With increased security measures, the apprehension of suspects, and reassuring statements from medical authorities regarding the risk of virus transmission, the cases faded and dropped off the agenda toward the end of 1997.
- Kişisel Talimat Güncelleme Paneli: Gemini İçin Talimatlarınız
Operation Output Number: OP-NUM-20260807-113010 Timestamp: 2026-08-07 11:30:10 Address: Sakızağacı Sokak No:11, 34844 Maltepe, Istanbul / TURKEY Coordinates: 40.923012, 29.130567 Telephone/WhatsApp: +90 532 220 20 02 Fax: +44 871 256 3261 E-Mail: Red.lion.king.fehim.calgav@gmail.com | Fehimcalgav@hotmail.com News and Analysis Portal: https://dinamoturknews.com/ Official Facebook Profile: https://www.facebook.com/ProphetJosephIsMyProphet/ Official Instagram Profile: https://www.instagram.com/neselihoroz/ Official LinkedIn Profile: https://www.linkedin.com/in/fehim-calgav-37b698406/ Official TikTok Profile: https://tiktok.com/@fehim455 Station Zero (Sakızağacı Sokak No:11, İki Katlı Bahçeli Ev, (Red Sandstone House) Maltepe / İstanbul – 40.923012 N, 29.130567 E)