HF Impedance Transformer Kits

2659348849 - HF Impedance Transformer Kits
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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

RFI-ELECRAFT-KPA1500
$129.95
In stock
1
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 - HF Impedance Transformer Kits

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.

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These impedance transformer kits have been designed for the Do-It-Yourself (DIY) enthusiast and Instructor workshops on baluns and ununs for antenna matching and RFI use.

The impedance transformers are classified in ratios of 2:1 (100:50 ohm) to 16:1 (800:50 ohm).  The outputs can be configured as balanced (Balun) or as unbalanced (unun) with respect to the inputs which are considered all unbalanced coax at 50 ohms.  All impedance transformers are designed for 1.8-31 MHz unless otherwise specified.