Collins: Watt Meters - 312B-3,4,5 / 302C1/2
Collins 100 watt & 1000 watt Forward & Reflected Power Meter
Collins 100 watt and 1000 watt forward and reflected power meter. 2 - 30 MHz. Includes Collins 542-4116-004 directional coupler, 458-0388-00 3" square wattmeters, phenolic rotary switch with knob to select meter scale and a ceramic rotary switch to select an antenna or dummyload. These parts come attached to a Collins 180T-2 remote control unit for an antenna coupler, better known as an SRA-22. The wattmeter parts are all there and connected together. Cut off the end of the SRA-22 for the front panel for your wattmeter. You can also remove the parts without disturbing the wiring and mount them in another cabinet. These parts are what make up a Collins 302C-1 or 302C-2 wattmeter, less the case. Order (EQP) SRA-22#1 or (EQP) SRA-22#3 below.
Antenna Coupler Control Head for SRA-22 Remote Tuner
(EQP) SRA-22#1
Collins antenna coupler control head for SRA-22 remote tuner. This is a complete tuner controller and directional watt-meter for your own remote tuner. A tremendous value. Made to swing mount in a 19" rack. Unit measures: 5-1/16" high x 8" deep x 18-1/2" long. 21 lbs. Used, surplus, fair condition. Sold as is. Unit Includes:

• 27 vdc, 0.5 amp power supply
• Collins directional coupler with "N" connectors
• 0 - 100 / 0 - 1000 watt-meters to go with directional coupler
• Phenolic rotary switch for forward & reflected range
• Ceramic switch for selecting antenna or load
• Dual transformer, independent 115 vac primaries,
30 vct @ 0.5 amp secondary
Aemco 83-3277 coaxial relay. 600 watts, 2 - 30 MHz
• 28 vdc. SPDT with "N" and "BNC" connectors

  • 2 - 100 ohm 5%, 10 turn pots with turns counting dial
• 2 - 500 - 0 - 500 µA, 2-5/8" panel meters
• 1 - 4PDT momentary toggle switch
• 1 - SPDT toggle switch
• 2 - 4PDT, 27.5 vdc sealed relays
• 2 - 2P4T lever switches
• Pilot light assembly
• Fuse holder
*** SOLD OUT ***
(EQP) SRA-22#3
Same as above except missing the 83-3277 coaxial relay. Mount an "N" double female bulkhead connector on the back panel to mate with the "N" male pigtail from the switch and you're ready to go. Same fair condition as SRA-22#3.
*** SOLD OUT ***
Collins Power Meter
0 - 25 watts
Collins power meter. Measures reflected power. 0 - 25 watts. "N" male, "N" female. 1"D meter. Press button for reflected reading. Removed from equipment.
$85 each
Collins 4 Ohm Speaker
(COL) SPKR-4-57
You're missing out if you haven't replaced your 20-30 year old speaker with our updated communications speaker made by the same manufacturer Collins contracted with. Delivers the desired warm audio from your tube type equipment. Many hams order extra after trying out this new design. Slips right into same mounting as original speaker in B3, B4 or B5. 5" x 7". Low impedance, 4 ohm impedance. Join the club! Also fits Drake MS-4 Speaker cabinet. A perfect replacement!
$36.75 each - $35 (3+), $32.50 (10+)
302C-1/2 Panel Meter
(COL) 458-0388-00
3" square meter does not fit 302C-3, only 1 & 2. 100 / 1000 watt scales.
*** SOLD OUT ***
312B-4/5 Manual
(PUB) COL-312B4/5
Latest Edition, 7th, 15 March, 1976. Covers both 312B-4 and 312B-5 operation and drawings. New Original.
$19 each
312B-4/5 Lever Switch
(COL) 259-1131-000
Replace your worn or broken lever switches. Knob not included. S-1 function switch on B4 & B5.
$46 each
(COL) 259-1132-000
Replace your worn or broken lever switches. Knob not included. S-2 phone patch switch on B4 & B5.
*** SOLD OUT ***
Other 312B4/5 Parts
Part Number Description Price Each  
(COL) 259-0966-000 S-3 switch for "Forward/Reverse" watts 39.00 Add
(COL) 376-4628-000 R10 Vox Balance pot 22.00 Add
(COL) 458-0467-000 312B-4/5 Replacement Meter 125.00 Add
(COL) 259-667-0326-000 T1 and T2 audio transformers 65.00 Add