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HARCs New Exhibit at the Maritime Museum of the Atlantic (MMA) MMA - PowerPoint PPT Presentation

Jun 06, 2023 •348 likes •929 views

HARCs New Exhibit at the Maritime Museum of the Atlantic (MMA) MMA Focus: history of ships, small craft, sailing, and sailors in the Maritimes MMAs main exhibition hall. HARC exhibit is on balcony facing hall. HARCs Permanent MMA

  1. HARC’s New Exhibit at the Maritime Museum of the Atlantic (MMA) MMA Focus: history of ships, small craft, sailing, and sailors in the Maritimes

  2. MMA’s main exhibition hall. HARC exhibit is on balcony facing hall.

  3. HARC’s Permanent MMA Exhibit A large, new “Radio Office” with: • Part A. A working modern amateur radio station • -CW/SSB/Digital • HF + 2m • Part B. A working 1940s-1960s ship-board commercial/navy “radio office” -CW/AM/MCW -375 kc to 14.0 Mc Antennas: -80/40 m doublet -40-10 m multiband vertical -2 m vertical

  4. The radio office’s story for MMA visitors Radio at Sea : ended age-old isolation of ships out of sight of land • Greatly aided navigation: – accurate time for longitudes – coastal beacons, RDF – WX forecasts • RX and TX distress calls • Coordination of ships at sea • Links with land “The SOS”

  5. What Type of Ship’s Radio Office Should Be Displayed? Varied with: -time period, -ship type and size, -radio equipment used 1940s Marconi gear 1950s RCA Radiomarine gear

  6. Heart of the HARC 1940-1960s ship radio office display: The Canadian Marconi CM-11 Ship Transmitter-Receiver Why the CM-11?? “ “ Remote” CM -11 on Haida - all Canadian design and manufacture - widely used 1942-1970s on ships + shore - uses available tubes and 115 VAC - I found two for free!! CM- 11 “vital statistics” - TX + RX: 375-515 kc, 1.5-14.0 Mc - RX ONLY: 78-550 kc, 14-30 Mc - 23 tubes, Xtal or VFO frequency control - AM, CW, MCW, RTTY - OUTPUT: 30W AM, 70 W MCW, 100W CW - WEIGHT: 479 lbs

  7. 1960s Radio #1 in RCN destroyer Haida : multiple listening posts with CSR-5s, and remote units to operate CM-11s in Radio #2

  8. Sackville ’s radio office (1940s): locally operated CM-11 Tnx, Spud!

  9. HMCS Swansea (1960) De Spud!

  10. Quebec Radio Museum storage: CM-11A (left), CM-11 (right) 72 years old 73 years old

  11. “As received” finish on the power supply

  12. May 2015: two CM-11s arrive in Canard!

  13. Goal: CM-11 Restoration - to good working order -to original appearance - with “period” accessories -with clear description of uses

  14. The CM-11 Restoration: 1. Diasassemble (12 subunits) 2. Choose units to restore, cannibalize 3. Strip down, clean, re-paint 4. Obtain missing parts + accessories 5. Overhaul mechanically 6. Ohmmeter, tube + capacitor tester checks 7. Overhaul electrically 8. Assemble subunits (TX, RX, Tuner, + 3 P/S sections) 9. Apply power to subunits 10. Test/Troubleshoot and Align subunits 11. Apply power to complete CM-11 + Test

  15. CSR-5A in original paint color

  16. CM-11A Power Supply: 250 lbs!

  36. The missing “Test Cable” and its snatch plugs

  44. Room built for HARC radio displays

  46. Amateur Station Ship’s Radio Office

  47. 1940s remote unit for CM-11 (for bridge, etc.)

  48. Not quite finished.....

  51. Tnx! • Musee Quebequois de la Radio – Jacques Hamel: VE2DJQ Gave us two CM-11s – Donald Courcy: VE1SS Lots of moving muscle for CM-11s HARC - Erik Hein VE1JEH Transported the brutes from Sorel, QC to Canard, NS! OTHER -Tom Brent: CM-11 aficianado – 575 kHz XTAL Filter -Jerry Proc: VE3FAB - HAIDA Radio Room restorer/info + manual source -Bill Perry: Mr. Amphenol connector -Wayne Blenkhorn: VE1BAB: key, decals, advice (former CM- 11 operator) -Corey Mullins: MMA tech who built the Radio Office!

  52. Listening in a ship’s radio office with the CM - 11’s CSR -5 receiver

  53. 1940s -> 1960s Haida radio room VE3FAB

  54. Radio office #1 on Haida . Remote units control CM-11s

  55. Radio Office #2 on Haida You can tell these CM-11s are mainly run in remote: -no mill (typewriter) -no key

  56. CM-11 and second CSR-5 RX often used together CSR-5 RX CM-11--> TX-RX

  57. Combined Morse and radio training on the CSR-5 in WW2

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