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Last modified 2023-08-08

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Heathkit SB-104A

A picture of Heathkit SB-104A
This radio has had its mike jack modified with a 4-pin metal locking ring connector

SPECIFICATIONS

GENERAL
Type:Amateur HF transceiver
Frequency range: 10-80 m + WWV
3.5-4.0 MHz (80 m)
7.0-7.3 MHz (40 m)
14.0-14.3 MHz (20 m)
21.0-21.5 MHz (15 m)
28.0-29.7 MHz (10 m)
15.0-15.3 MHz (WWV, RX only)
Tuning steps:Analog / continuous
Frequency stability:? ppm
Mode:SSB / CW
Channels / memory management: None
Repeater shift / offset:No
Power supply:12.6-16 VDC
Current drain / power consumption:RX: 2 A
TX: 3 A (Low), 20 A (High)
Antenna impedance / connector:TX/RX: 50 ohm / Phono (RCA)
RX only: 50 ohm / Phono (RCA)
Dimensions (W*H*D):368*146*352 mm (14.49*5.75*13.86")
Weight:9.1 Kg (20 lb)
Other features:




RECEIVER SECTION
Receiver system: Double conversion superheterodyne
1st IF: 8.65 MHz
2nd IF: 3.395 MHz
Sensitivity:SSB: 0.5 uV (10 dB S+N/N)
Selectivity: SSB
2.1 KHz (-6 dB)
5 KHz (-60 dB)
CW (With narrow filter option)
400 Hz (-6 dB)
2 KHz (-60 dB)
Image rejection:60 dB
AF output power / speaker:2.5 W at 10% distortion / No internal speaker
External speaker connector:Phono (RCA), 4 ohm




TRANSMITTER SECTION
RF output power:

HighLow
SSB (PEP):100 W1 W
CW:100 W1 W
Modulation system:
Max FM deviation (Factory set):No FM
Spurious emissions:Better than -? dB
Microphone impedance / connector:Hi-Z / 2-pin
Microphone input level:? mV




MISCELLANEOUS
Manufactured:USA, 1977-1982 (Discontinued)
Additional info:
Related documents: User manual (42.5 MB)
Assembly manual (76 MB)
Schematic diagram (408 KB)
Illustration booklet (4 MB)
Modifications and fixes:
Reviews:
Options / Accessories:
HD-1410
HP/PS-1144
SB-230
SB-604
SB-614
SB-634
SB-644
Electronic keyer
AC power supply
Linear amplifier
Matching speaker. 4 ohm
Monitor scope
Station concole
External VFO
A rear picture of Heathkit SB-104A