Login or Register to upload images

Find Ten-Tec RX-340 rigs and spare parts on eBay Find the Ten-Tec RX-340 on Amazon
We receive a small fee if you buy through these links, which helps support this site. Thank you!

It has been said that there is no perfect shortwave receiver. But that was before the TEN-TEC RX-340. This communications receiver combines cutting-edge, state-of-the art technology, with excellent ergonomics and esthetics. Digital signal processing (DSP) brings the performance and repeatability of expensive military grade communications receivers into the price range of top end commercial receivers for shortwave listeners. Tunable from 5 kHz to 30 MHz, it provides tuning steps and display resolution of 1 Hz. All three displays are blue-green vacuum fluorescent and provide unparalleled contrast and readability.

The performance level of receivers in this class is possible only through extensive use of Digital Signal Processing. These designs utilize fewer analog circuits than traditional receivers. Powerful, specialized DSP microprocessors replace many of the discrete circuits with intensive software containing over 60,000 lines of code. High dynamic range analog stages provide first, second and third IFs (and 80 dB of AGC) where signals then hit analog to digital converters. Everything else is accomplished in DSP including all mode detection, IF filters, AGC (remaining 40 dB), adjustable BFO, passband tuning and noise blanker. An astounding 57 bandwidths from 100 Hz to 16 kHz are included. All filters have a shape factor of 1.5:1 or better (6 to 60 dB). USB, LSB, ISB, CW, AM, Synchronous AM and FM modes are built-in. Four AGC modes are provided. Users will be familiar with conventional Fast, Medium and Slow modes, but the "Programmable" mode is ground breaking. Users may build their own personal AGC characteristic by selecting attack, hang and decay rates. Manual control from the front panel is also adjustable over 120 dB range. A tunable Notch filter rejects unwanted signals in the passband. The receive front-end incorporates a built-in preselector with eight one half octave bandpass filters. Switchable 10 dB preamp and 15 dB attenuator are also provided. The status of many programmable parameters are constantly shown on subdisplays. The signal strength meter is calibrated in both S-units and dBm.

Little known to most shortwave listeners, TEN-TEC has been a supplier of commercial grade receivers for several years. Their RX-331 black box is used in military, diplomatic and commercial concerns worldwide. In this application multiple units run 24 hours per day, seven days per week without interruption. The RX-340 uses these field proven circuits along with a comprehensive front panel. This provides conventional manual operation while retaining all of the remote control aspects of the RX-331. A built-in multi-drop RS-232 interface permits remote operation at baud rates from 75 to 38400. Accessed from the rear panel DB-25 connector, the interface may be configured for single or multiple receiver applications. The complete command language is published in the receiver's manual so enterprising users can write their own remote control software. The RX-340 also includes Built-in Test or BITE. This self-test capability will identify virtually all faults to the board level. The RX-340 is also DRM capable and ready without any hardware modifications. Click here for DRM tuning instructions.

Memory and Scan functions fall into four categories: a scratchpad memory, 100 memory channels, memory scan and sweep (F1 to F2 scan). Each memory channel retains the frequency, mode, IF bandwidth and BFO setting. When scanning memories, the dwell time, dead time and gaze time are all programmable. Channel lockouts are provided and a Pause feature lets you interrupt scan momentarily. The Squelch works in all modes and adjusts over a 150 dB range. A dimmer function allows you to adjust the brightness of the digital displays.

The RX-340 features a built-in TCVCXO to provide 1 ppm frequency stability across the entire operating range of 0 to 50 degrees C. Audio is delivered to a built-in speaker on the top panel, external speaker jack on the rear and the 1/4 inch headphone jack on the front. Separate volume controls are provided for the speaker and for the headphone. Fixed level 600 ohm audio is also provided on the rear panel. The front panel features a Lexan graphics overlay designed to last a lifetime. The chassis is aluminum with alodine plating on all parts to protect finish in less than ideal environments. A mute provision is provided for transmit/receive applications (mutes audio and IF outputs). BNC Outputs include: IF Output (post DSP 455 kHz bandwidth determined by filter), Signal Monitor Output (Delayed AGC, 455 kHz, 16 kHz) and Signal Monitor Output (2nd Mixer, No AGC, 455 kHz 16 kHz bandwidth). The RX-340 mounts in a standard 19 inch rack.

New price 2001 in the US: $3950.00

General characteristics

HAM bands
160m  80m  60m  40m  30m (WARC)  20m  17m (WARC)  15m  12m (WARC)  11m (CB)  10m  2000m 
Frequency stability
±1 ppm (0-50°C)
Tuning steps
100 channels in 1 bank(s)


0.005-30 MHz
AM   AM-sync   FM   CW   SSB   USB   LSB  
< 0.14 µV CW .5-30 MHz (10 dB S+N/N) Typical. Preamp on.
< 0.25 µV LSB/USB/ISB
< 0.56 µV AM
< 0.90 µV FM
57 bandwidths selectable from 0.1 kHz to 16 kHz.
Shape factor 1.5:1 or better. 6 to 60 dB.
Receiver system
Digital signal processing
Image rejection
90 dB typical, 80 dB minimum
Audio output
Two 600 ohm (one for each sideband in ISB)




Power requirements
90 - 264 VAC, 48-440 Hz, 30 Watts
Current drain RX


Dimensions (w×h×d)
482 × 133 × 317 mm (18.98 × 5.24 × 12.48 in)
5.67 kg (12.5 lbs)
Form factor
Base Station
Between 2000 and 200x in USA

Other features

Amateur / Ham radio operators
Features + options
RigReference ID

Manuals, diagrams and brochures

Tentec Rx340 HF DSP Reciever Datasheet PDF - 68.9 kB, submitted by Berend
Upload relevant documents

Reviews & stories

Do you know this rig? Tell us something about it!

New and second-hand prices

Estimating the value of a rig can be challenging. We collect prices paid by real hams over the years to help you estimate the value of a used Ten-Tec RX-340. Just bought or sold this model? Let us know what you traded it for and help other ham operators!

Based on historic data, today's second-hand price of the Ten-Tec RX-340 is around:

  • USD 996.00

Price History Chart

These estimates are based on the following prices:

Year Historic price Condition Submitted by
2014 USD 2500.00 Used / Mint dxace1

Login or Register to submit prices

Links & tools