Most products can be customised according to customer requirements.

On demand special specification designs are made to order.

 

HF Tunable Radio Preselectors

       
 


HF Tunable 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.

Works with Windows 10, Windows 11.

 

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 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.
-Works on Windows 11

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

       

Band Converters


 

VLF-LF-MF bands Up-Converter

Crystal Oscillator

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

>5kHz to 520kHz to 3.5MHz-4MHz up converter. (model 350)

 

GPS-REF. VLF-LF-MF bands Up-Converter

External GPS Disciplined Oscillator, GPSDO,

> 5kHz to 520kHz to 4MHz-4.5MHz  (model 400 GPS-REF)

     
     
 

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 0º Passive Splitter-Combiner

 
 

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

Connector options available

 
   

Two Way 0º Passive Splitter & By-Pass Relay

 
     
     
 

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.

 
     

RF RELAYS

 

 

 
 

DC-3GHz coaxial relay.
Slim size.
Frequency range: DC-3GHz


Dual Port RFl Relay.

DC-1300MHz, 100 Watts RF power rating.

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

 

AM Medium Wave Broadcast Band Rejection filter.

No switching relays.

To be inserted between the antenna and the transceiver.
Transparent filter on transmission.
200 Watts power rating. (400W PEP)
Broadband HPF 1.8MHz to 150MHz


VHF AIRCRAFT BAND RF FILTER

High rejection of the FM boadcasting band.

118MHz - 137MHz Multipole Composite HPF

     
 

Range of general purpouse 7th order miniature passive Elliptic Low Pass Filter series.

Thirty five frequencies to choose covering from 100kHz up to 500Mhz.

BNC or SMA connectors. Customised 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
 
 
     

Prefiltered VLN RF Preamplifiers

 
 

 

 
         

From 100kHz to 500MHz range of thirty five prefiltered, 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.

 

Galvanic Isolators. Indoors

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


Removes local pick-up noise by the antenna feedline.
Removes noisy ground loops.
Full galvanic isolation between connected radio equipment
Protection against different ground potentials.
- Power rating: 200 watts continuous wave.(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 against different ground potentials.


 

USB Galvanic Digital Isolator for SDR radios.

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

 
         

Galvanic Isolator. Outdoor Mounting

     
 

Hi-Power 10kHz - 150MHz Antenna Galvanic Isolator.
Outdoor mounting version.

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

 
     

Impedance Matching for Longwire Antenna

 
     
         
 

Avoids the use of antenna tuning devices.
Frequency range: 10kHz to 60MHz.
Power rating: 200 watts CW (400 watts PEP)

If a Long Wire antenna is used an impedance matching device is essential to match the high impedance figure of the antenna, tipical 450Ω, with the 50Ω standard impedance of radio equipments.

Matching the antenna-radio system impedances can boost signal strength up to 20 dB, in worst impedance mismatch cases, allowing signals to cut through interference and noise more effectively.

 
     

RF Measurement

 
 

 

 
 

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

Connector options available.

 
     
     
 

Range of general purpouse 7th order miniature passive Elliptic Low Pass Filter series.

Thirty five frequencies to choose covering from 100kHz up to 500Mhz.

BNC or SMA connectors. Customise 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
 

 

 
 

 

 
 

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.

 
     
 

RF Sampler.
High Power Non-Directional coupler.
-40dB RF sampling.

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

 

 



General purpose impedance measurement bridge.

Bandwith: DC to 150MHz

Impedance: 50 Ohms

 
         

Radio Accessories

 

DC Power Distribution Centre Up to 50 Volts/50 Amp.

One Input port. Thirteen Protected Output Ports available to power DC devices simultaneosusly safely.

   
   

 

         
   

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