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Last modified 2021-06-06

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President HR-2510

A picture of President HR-2510

SPECIFICATIONS

GENERAL
Type:Citizen band / "Freeband" / Export transceiver
Frequency range: 26-30 MHz
Originally marketed as a 10 m ham transceiver, but
expanding the frequency coverage is a simple task.
Channels/tuning steps:100 Hz, 1 / 10 KHz
Mode:AM / FM / SSB / CW
Frequency control:PLL
Frequency stability:300 Hz @ 25C (77F), after 5 minutes warmup
Power supply:13.2 VDC
Current drain/power consumption:RX: Max 1 A
TX: Max 5 A
Antenna impedance/connector:50 ohm / SO-239
Dimensions (W*H*D):185*60*250 mm (7.28*2.36*9.84")
Weight:2 Kg (4.41 lb)
Other features:PA. SWR-meter. NB. RIT. Dimmer. Scanning.




RECEIVER SECTION
Receiver system: Single conversion superheterodyne (AM/SSB/CW)
IF: 10.695 MHz
Double conversion superheterodyne (FM)
1st IF: 10.695 MHz
2nd IF: 455 KHz
Sensitivity: AM: 0.5 uV (10 dB S/N)
FM: 0.5 uV (20 dB S/N)
SSB/CW: 0.25 uV (10 dB S/N)
Selectivity:10 KHz (-70 dB)
Image rejection:65 dB
AF output power/speaker:2.5 W at 10% distortion / 8 ohm
External speaker connector:9-pin Molex accessory jack, 8 ohm




TRANSMITTER SECTION
RF output power: AM/FM: 10 W
SSB: 25 W (PEP)
CW: 25 W
Modulation system:
FM deviation:? KHz
Spurious emissions:Less than -50 dB
Microphone impedance/connector:500 ohm / 5-pin (Metal locking ring connector)
Microphone input level: AM: 1 mV (For 50% AM modulation)
FM: 1.5 mV (For 1 KHz deviation)
SSB: 1 mV (For 10 W PEP output)




MISCELLANEOUS
Manufactured:Philippines, 1988-199x (Discontinued)
Main PCB:PB-111 by Uniden
Sub PCBs: PB-100AA - Shorting bar board
PB-112AA - LCD and driver board
PB-113BA - Pushbutton board
PB-114AB - Volume and squelch pot board
PB-115AA - Channel selector board
PB-116AA - Mode selector board
PB-117AA - NB board
PB-118AA - SWR board
PB-119AB - FM board
PB-120AB - RIT and RF gain pot board
PB-126AB - Mic jack board
Additional info:New price 1988 in the US: $239.95
Related documents: User manual (5.1 MB)
Service manual (7.1 MB)
Schematic diagram (1.75 MB)
RF driver: 2SC2166
RF final: MRF477
Sams Photofact #:None
Modifications and fixes: Frequency expansion (219 KB)

There was also the "Chipswitch", which added many enhanced features such as: Even further
extended frequency range, 30 memory channels, repeater offset, split operation and more. This
modification consisted of a CPU replacement. In 2008, the chip was available for around $50.
Reviews: Monitoring Times: October 1988
CQ: February 1989
Options/accessories:
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