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

Most products can be customised according to customer requirements.

On demand special specification designs are made to order.

 

 
Tunable Radio Preselectors
       
 


SCR Preselector-CAT

SCR Preselector 2020. Tunable Digital Preselector

1.8MHz to 50MHz. Six bands, tunable Band-Pass Filter bank. Digital tuning.

Specially designed for mid-high class Software Define Radios.
Compatible with any analogue radio.

 

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-CAT. Tunable Digital Radio Preselector.

- 1.8MHz to 30MHz. 5 bands, tunable Band-Pass Filter bank.

- Modular design architecture to complement radio projects.

- USB or I2C bus remote control module options.

 Remote control modes:

USB control module:
- Graphic User Interface 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 <5kHz to 520kHz to 3.5MHz-4MHz up converter. (model 350)
VLF-LF-MF <5kHz to 520kHz to 4MHz-4.5MHz up converter. (model 400)


Compatible with any analogue radio(valves, semiconductors) or
Software Define Radio (SDR).
 


VHF Down-Converter

144MHz-146MHz to 28MHz-30MHz VHF down converter.

Compatible with any analogue radio(valves, semiconductors) or
Software Define Radio (SDR).
 
         
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.

 

 

Splitter - Combiner
 

4kHz-60MHz Splitter

 

Two way Passive Antenna/Signal Splitter-Combiner

Frequencies range: model VLF (4KHz to 60MHz)

 

Two way Passive Antenna/Signal Splitter-Combiner

Frequencies range: model HF (100KHz to 450MHz)

 
         
RF Measurement
 
 

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

 

 

Generak Purpose Low Pass Filters range.
Thirty five frequencies available from 100kHz up to 500MHz.

- 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
 

 

 
 
     
 

40dB Tab attenuator. 100 Watts power rating.

Transmission signal sampling.

Panoramic Spectrum 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.

 
     
Antennas& Accessories
 
         
     
 

10kHz to 150MHz LF-HF-VHF Antenna Galvanic Isolator.

Removes local pick-up noise by the antenna feedline.
Highly recommended to work with SDR radios.
Suitable for analogue radios.

  20MHz to 1.3GHz VHF-UHF-SHF Antenna Galvanic Isolator.

Specifically recommended to work with SDR radios.
Suitable for analogue radios.
 
         
         
     
 

Impedance Match adapter for Longwire Antenna .
Indoor version.
Suitable for SDR and analogue radios.

 

Impedance Match adapter for Longwire Antenna
Outdoor version mounting.
Suitable for SDR and analogue radios.

 
         
         
     
 

Antenna Feed Line Noise Cancel.

Suitable for SDR and analogue radios.
Outdoor mount.

 

Antenna Galvanic Isolator.

Removes local pick-up noise by the antenna feedline.
Highly recommended to work with SDR radios.
Suitable for analogue radios.
Outdoor mount.

 
         
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 Filters

 

MW Broadcast Band Rejection filter (BCB filter)
No switching relays.

To be inserted between the antenna and the transceiver.

200 Watts power rating.

No filter switching system is needed. No relays.

 

 

Range of general purpouse Low Pass Filters.
Thirty five frequencies available.From 300kHz up to 500MHz.

- 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
(Blocks the FM boadcasting band)

118MHz - 137MHz Multipole Composite HPF

 
     
Galvanic Isolators
 
     
 

USB Galvanic Digital Isolator for SDR radios.

Remove noise coming from comuter.

Recomended for SDR radios.
  Audio Line Galvanic Isolator.

Suitable for SDR radios, ultrasonic applications and audio systems.

Two channels.

 
         
         
     
 

10kHz to 150MHz LF-HF-VHF Antenna Galvanic Isolator.

Rejects pick-up noise from the antenna feedline.

Remove antenna feedline ground loops.

Highly recommended to work with SDR radios.

Suitable for analogue radios.

 

20MHz to 1.3GHz VHF-UHF-SHF Antenna Galvanic Isolator.

Rejects noise from the antenna feedline by removing ground loops

Specifically recommended to work with SDR radios.

Suitable for analogue radios.

 
         
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