Impedance Transformers (<1:1, >1:1)

Elecraft KPA1500 HF Linear Amplifier RFI Kit - 15 Filters for RF In/Out, AC Power, PA KEY, Computer Control/AUX/RS232

SKU RFI-ELECRAFT-KPA1500
$129.95
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Elecraft KPA1500 HF Linear Amplifier RFI Kit - 15 Filters for RF In/Out, AC Power, PA KEY, Computer Control/AUX/RS232
Product Details
MPN: RFI-ELECRAFT-KPA1500
Type: New
Country/Region of Manufacture: United States
Filter Power Rating (PEP watts): coax cable limit
RFI Suppression Range (MHz): 1-300 MHz
# Ferrite Filters: 15
Typical Use:: AC power, RF In/out, I/O control cables

KPA1500

KPA 1500 Back Panel png - Impedance Transformers (<1:1, >1:1)

This RFI Kit Includes are the following filters and installation guidelines:

RF Input:F240 ring – 5-9 turns of RG-58/8X size through center

RF Output:# 1 - FSB31-1 (Big Clamp on) – 3 turns of RG-8 size cable

RF Output:# 2 - FSB31-1 (Big Clamp on) – 3 turns of RG-8 size cable

PA KEY Cable: - FSB31-1/2 – multiple turns through choke – ½” diameter hole

DC Power Line: - FSB31-1 (Big Clamp on) – 2 turns through center

AC Line of DC Power Supply: - FSB31-1 (Big Clamp on) – 3 turns through center

Ports 7 to 15 : - FSB31-1/2 – multiple turns through choke – ½” diameter hole

Total ferrites: - F240 rings (1), FSB31-1 (4), FSB31-1/2 (10)

Also make sure you connect a good RF ground to the amplifier ground post.

Palomar Engineers offers a variety of impedance transformers configured as Baluns (balanced coax to unbalanced load) or Ununs (unbalanced coax to unbalanced load) for  matching typical 50 ohm feed line impedances to antenna or other load impedances.

We specify impedance ratios as an output to input ratio where the output (or load) is given first and the input is given second (e.g. 100:50 (2:1) would mean a 100 ohm output and a 50 ohm input; a 25:50 (1:2) would mean a 25 ohm load and a 50 ohm input).  Most all products use a 50 ohm input unless otherwise specified.

We have products that are available as kits for the do-it-yourself (DIY) person or fully assembled and tested units for the “Plug & Play” crowd.

Our impedance transformers are available using two different topologies: Binocular cores or  toroid cores with multiple turns for increased effectiveness and wide band frequency transformations.  We utilize single and multiple core transformers using high order windings when needed to extend product performance.

We rate the power ratings as watts PEP (Peak Envelop Power) with standard duty cycles for various modes. To determine the PEP rating required for your needs, see: Choke & Transformer Power Ratings

This website page serves as a link page to the frequency ranges of our impedance transformers configured as either baluns or ununs.  You can click on a picture to go to the specific page about the products described in the picture.