National / Panasonic RF-4900 Mobile HF/VHF Receiver

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Green fluorescent display. This is the US version of the DR-49.

Frequency range

RX-range
0.525-31 MHz / 88-108 MHz
TX-range
-
HAM bands
-
Stability
-
Tuning steps
-
Filters
-

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Receiver

Modulations
AM   W-FM   CW   SSB  
Sensitivity
5-30 MHz
AM 1,1 - 1,4 µV
SSB 0,6 - 1,0 µV
MW
60 µV
Selectivity
-6/-60 dB
1,7/6,0 kHz, 2,5/15 kHz
Receiver system
-
IF-frequencies
-
Image rejection
-
Audio output
-

Transmitter

Modulations
-
RF-Output
-

Connections

Antenna
Clamps / screws + Built-in ferrite bar
Impedance
50 Ω

Electrical

Power requirements
13.8V DC or mains
Current drain RX
-
TX
-

Physical

Dimensions (w×h×d)
482 × 200 × 354 mm (18.98 × 7.87 × 13.94 in)
Weight
8.00 kg (17.7 lbs) less batteries
Form factor
Mobile
Manufactured
Between 1979 and 1983 in Japan

Other features

Memories
-
Usage
Amateur / Ham radio operators
Features + options
S-Meter
RF-Gain
Accessories
-

Manuals, diagrams and brochures

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Reviews

Almost too much fun

National / Panasonic RF-4900, Mobile HF/VHF Receiver

The RF-4900 is a pretty good all rounder, considering its age. AM and FM reception are good, but for DX'ing you'd probably want something a little more advanced. For SSB listening the stability leaves some to be desired. You have to adjust constantly to keep the opposite station 'in focus'. Also, the frequency in the display is always a bit off, at least with my set. Audio sounds very nice though. And I also like the looks of the beast. They just don't make proper table top receivers like this any more. I wouldn't consider parting with it, it's just too much fun to lister and operate.

Written by n25 on Aug 11, 2009

Overall
 
Performance
Build quality
Features
User friendlyness
Value for money
Aquired
Good condition in 2003
EUR 125.00

Its ok to be a kid again.

National / Panasonic RF-4900, Mobile HF/VHF Receiver

This huge box loaded with dials & knobs: if you get a mis-aligned, poorly treated one you'll swear (literally) that its the biggest piece of junk ever made. But if your RF-4900 is tuned up then you'll have a difficult time turning it off the first time using it. When properly aligned it pulls in signals almost magically with just a short piece of wire. It is fun to use. The massive size is a plus in my opinion, although the offical reviewer here apparently feels otherwise. Its a mighty good MW (AM broadcast band) receiver just utilizing the rear-mounted loopstick. Shortwave, well what can I say? Its pulls them all in - easily. I do use this radio on sideband. A good time can be had there as well, provided that your antenna isn't too much and you manage to find yourself in an RF noise free setting. Yes, it does drift on sideband, but the instability can be mimimized to neglible by (a.) using battery or external DC power and, (b.) keep the dial lights off. This isn't a serious Ham receiver. There will be noise and likely some drift. Don't be deadly serious all the time. Enjoy yourself. Buy one for $150 - $250 used. Keep your fingers crossed that its not a badly out of alignment unit.

Written by Radio10 on Nov 13, 2012

Overall
 
Performance
Build quality
Features
User friendlyness
Value for money
Aquired
Good condition in 2010
USD 230.00

Not a first hand choice

National / Panasonic RF-4900, Mobile HF/VHF Receiver

Works OK for listening to strong international broadcast station, but so do most receivers. The main drawbacks are its size and the lack of stability and selectivity. Furthermore, image rejection is poor on some bands.

Written by magnus on Dec 27, 2010

Overall
 
Performance
Build quality
Features
User friendlyness
Value for money
Aquired
Good condition in 2010
EUR 120.00

Prices

Estimating the value of a rig can be challenging. The graph below shows historical prices paid by hams over the years. May it guide you to good fortune...

Price Condition Year User
EUR 125.00 Good / Used 2003 n25
USD 230.00 Good / Used 2010 Radio10
EUR 120.00 Good / Used 2010 magnus
To submit a price, either review the rig or add it to your shack.

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