During this unusual times we continue on the front line serving our customers. :)


 

Most products can be customised according to customer requirements.

On demand special specification designs are made to order.

All our products are proudly designed, and manufactured in the United Kingdom.

 

 

HF Tunable Radio Preselectors
       
 


SCR HF tunable Preselector page.

HF Preselector-SCR-CAT 2020

1.8-50MHz Tunable Digital Band Pass Filter bank.

Six bands Software Controlled Radio preselector.

Featuring Computer Aided Transceiver (CAT) operation for remote tune.

 

Five operating modes:

Stand alone mode: By means of its front control knobs.

Remote Control modes. Tracking feature:

- GUI. Graphic User Interface application console on PC.

- CAT communication protocol for remote tuning. Tracking feature.

- Supported by DDUtil v3.

- TCP/IP. Over the Internet or local network.

- I2C bus. From a dedicated external control system.

 

Tiny HF tunable Preselector page.

Tiny HF Tunable Preselector.

- 1.8MHz to 30MHz. 5 bands, tunable HF Preselector

- Modular design architecture to complement radio projects.

- USB or I2C bus remote control module options.

 Remote control options:

USB control module (Default):
- Graphic User Interface command console from PC. Windows O.S.

I2C bus control module:
- Lets remote control from PowerSDR application.
(Optional control module).

       
Band Converters
  VLF-LF-MF bands Up-Converters

VLF-LF-MF bands Up-Converter

Two models available:
below 5kHz to 520kHz to 3.5MHz-4MHz up converter. (model 350)

below 5kHz to 520kHz to 4MHz-4.5MHz up converter. (model 400)


Compatible with Software Define Radios and Analogue radios.

  VHF Down-Converter


143MHz-146MHz to 27MHz-30MHz VHF down converter.

New extended radio spectrum coverage!

Covering space surveillance and 2m VHF amateur radio band.

Compatible with Software Define Radios and Analogue radios.

 
         
Two Way 0ยบ Passive Splitter-Combiner
 
 

Frequency range: VLF- LF-MF-HF 4kHz-60MHz      Frequency range: LF-MF- HF-VHF-UHF 100kHz-450MHz

Connector options available

 
     
Antenna & Accessories
 
         
  Antenna Galvanic Isolator    
 

Hi-Power 10kHz to 150MHz Antenna Galvanic Isolator.

Removes local pick-up noise by the antenna feedline.
Removes noisy ground loops.
Full galvanic isolation between connected radio equipment
Protection again different ground potentials.
- Power rating: 200 watts (400watts PEP)
Highly recommended to work with SDR radios.

 

HF-SHF Galvanic Isolator. Range 3MHz-2.5GHz

Full galvanic isolation between connected radio equipment.
Removes noisy ground loops.
Protection again different ground potentials.

 
         
         
     
  Impedance Match adapter for Longwire Antenna .

- Frequency range: 10kHz to 60MHz.
- Impedance ratio: 9:1
- Power rating: 200 Watts PP
Suitable for SDR and analogue radios.
Indoor version.
 

Impedance Match adapter for Longwire Antenna
.
- Frequency range: 10kHz to 60MHz.
- Impedance ratio: 9:1
- Power rating: 200 Watts PP
Suitable for SDR and analogue radios.
Outdoor version mounting

 
         
RF Filters

 

AM Medium Wave Broadcast Band Rejection filter.

To be inserted between the antenna and the transceiver.

Transparent filter on transmission.

No switching relays.

200 Watts power rating. (400W PEP)

Broadband HPF 1.8MHz to 150MHz


 
     
     
 

Range of general purpouse Low Pass Filters.
Thirty five frequencies available.From 300kHz up to 500MHz.
BNC or SMA connectors. Customize versions available.

 
 

- 100kHz
- 300kHz
- 500kHz
- 600kHz
- 620kHz
- 800kHz


- 900kHz
-1.0MHz
- 1.3MHz
- 1.5MHz
- 2.0MHz


- 3.0MHz
- 4.2MHz
- 4.5MHz
- 5.0MHz
- 6.0MHz


- 9.0MHz
- 10.0MHz
- 15.0MHz
- 17.0MHz
- 20.0MHz
- 30.0MHz
- 45.0MHz
- 60.0MHz
- 70.0MHz
- 88.0MHz
- 90MHz
- 100MHz
- 150MHz
- 200MHz
- 220MHz
- 250MHz
- 300MHz
- 400MHz
- 500MHz
 
 
     
     
   
 

VHF AIRCRAFT BAND RF FILTER
(Rejects the FM boadcasting band)

118MHz - 137MHz Multipole Composite HPF

 
     
Prefiltered RF Amplifiers
 

 

 

From 300kHz to 500MHz range of eleven Pre-Filtered, Very Low Noise, High IP3 preamplifiers.

For general purpose use such as Antenna signal booster, Instrumentation and IF Buffer for SDR radios applications. Featuring On-Off / By-pass function.

 

Antenna / Signal switching. Station automation.
 

DC-3GHz coaxial relay.

Slim size.
Power Rating 100Watts. Freq. range: DC-3GHz

 

 

General purpose Dual Port, By-Pass relay.

DC-1300MHz, 100 Watts RF power rating.

 
 

Antenna Splitter&By-Pass Relay.
Panoramic reception. Transmission monitoring.

Simultaneous reception on any transceiver and any receiver sharing the same antenna.
If a SDR radio is used as secondary receiver you get Panoramic Spectrum reception/Transmission monitoring feature.
On transmission switch-over embeded protection circuitry avoids overloading the secondary receiver and internal components of the unit.
It brings new life to any older radio by adding advanced SDR features.

 

Solid State RF Relay. DC-3GHz.

No Relays, No mechanical parts, No moving parts.
Very High Isolation port to port >100dB.
Form C. SPDT Absorptive configuration.

 
         
RF Measurement
 
     
 

Generak Purpose Low Pass Filters range.
Thirty five frequencies available.From 300kHz up to 500MHz.
BNC or SMA connectors. Customize versions available.

- 100kHz
- 300kHz
- 500kHz
- 600kHz
- 620kHz
- 800kHz


- 900kHz
-1.0MHz
- 1.3MHz
- 1.5MHz
- 2.0MHz


- 3.0MHz
- 4.2MHz
- 4.5MHz
- 5.0MHz
- 6.0MHz


- 9.0MHz
- 10.0MHz
- 15.0MHz
- 17.0MHz
- 20.0MHz
- 30.0MHz
- 45.0MHz
- 60.0MHz
- 70.0MHz
- 88.0MHz
- 90MHz
- 100MHz
- 150MHz
- 200MHz
- 220MHz
- 250MHz
- 300MHz
- 400MHz
- 500MHz
 

 

 
     
   
 

Variable 0dB to 71dB step attenuator. Ladder configuration. 1dB step.

Connector options.

 
     
     
     
 

High Power Non-Directional coupler. 40dB Tab attenuator.

DC-500MHz
400 Watts power rating.
Transmission signals sampling.
Panoramic Spectrum adapter for transceivers.
General measurements tool.

 

 



General purpose impedance measurement bridge.

Bandwith: DC to 150MHz

Impedance: 50 Ohms

 
         
 

 

 
 

Marker-Conbo Generator

 

 
 

Frequency Marker/Combo-Pattern Generator

Cost –effective precise signal generator and reference signal level for calibration and alignment purposes up to 3 GHz.

1MHz-100kHz-10kHz composite Combo-Pattern Generator up to 3 GHz and signal reference level.

10MHz-1MHz-100kHz-10kHz-1kHz-100Hz-10Hz-1Hz Marker Generator. Variable output level.

Reference clock: Internal from a 10MHz TCXO master oscillator.

External from a reference source such as GPS-locked frequency clock generator.

 
     
Galvanic Isolators
 
     
 

USB Galvanic Digital Isolator for SDR radios.

Remove noise coming from comuter.
Highly recommended to work with SDR radios.

  Audio Line Galvanic Isolator.

Suitable for SDR radios, ultrasonic applications and audio systems.

Two channels.

 
         
         
     
 

Hi-Power 10kHz to 150MHz Antenna Galvanic Isolator.

Removes local pick-up noise by the antenna feedline.
Full galvanic isolation between connected radio equipment
Protection again different ground potentials.
Highly recommended to work with SDR radios.

  HF-SHF Galvanic Isolator. Range 3MHz-2.5GHz

Full galvanic isolation between connected radio equipment.
Removes noisy ground loops.
Protection again different ground potentials.

 
         
Accessories
 
         
   

PTT foot switch

Robust momentary action foot operated switch with non slip base.

• 1.8m cable length.
• Standard 3.5mm jack plug. Other connectors available, Please ask.
• Dimensions 74 x 75 x 32mm
• Rated 3A 250V AC

 
         
Electronic components
 
   

Toroid cores
 
         
 

 

   
  LODESTONE PACIFIC
Toroid Mounts
  Mini-Circuits