KP-1 Power Meter - KOHJINSHA

KP-1 is a SWR and Power meter employing current transformer covereing the frequency range of 1.8MHz through 30MHz.

■ A large scale analogue cross meter and 7 segment LED allows for easy reading.

■ Meter has a built-in white LED back lighting allowing for readouts in low level light.

■ Meter has four ranges to measure power from 10W to 10KW. Digital display is not affected when changing measuring range.?

■ Digital display indicates SWR value.

■ PEP power readings with adjustable hold time, while operating SSB/CW.

■ Over-load protection circuit protects your linear amplifier and antennas. User adjustable trigger value of SWR(1.4 ～ 2.5) activates the protection circuit when SWR
exceeds the threshold level. Protection circuit opens the TX GND line between exciter and linear amplifier.

KP-1　Product specification
Frequency range	1.8～30MHz	Insertion loss	Leaa than 0.1 dB
Power measurement range	0～10KW	Input-and-output impedance	50Ω
Electric power range	FED　500W /1KW / 5KW / 10KW REF　125W / 250W / 1250W / 2500W	Input-and-output	M type （SO-239）
Electric power range	FED　500W /1KW / 5KW / 10KW REF　125W / 250W / 1250W / 2500W	Outside dimension	229(W)×136(H)×110(D) （A projection thing is not included.）
Power measurement accuracy	±７％（Full-scale value ）	Weight	Approx1.7Kg
SWR measurement minimum electric power	Approx 8W	Accessories	Operation manual DC adapter

Price　US$400

① Cross Meter
You can read FWD/ REF power and SWR withthis analog meter. The crossing point
of needlesshows the SWR value.② Digital Display
You can select functions with the buttons below the display. When the function is selected, the button shines blue.

③ FWD Button
Digital display shows FWD power when this button is pressed.

④ REF Button
Digital display shows REF power when this button is pressed.

⑤ SWR Button
Digital display shows SWR when this button is pressed.

⑥ PEP Button
This switch toggles between average power and PEP power. When it is showing PEP, it lights blue.

⑦ DEL Button
Digital display shows the power going into your antenna FWD‐(minus)REF when this button is pressed.⑧ PROTECT Lamp
When the SWR becomes higher than the value you set up, it is activated. When activated, the connection between 12 TX GND and 13 RELAY IN is disconnected inside of KP‐1.

⑨ POWER Switch
This switch is used to turn on the KP‐1.
The button shines red when the power supply is on.

⑩ Range Select
You need to choose the proper range in order for the analog meter needles not to jump offscale. You don’t have to think about power range for digital display.

⑪ Power jack
For DC12V adaptor plug.⑫ TX GND Terminal
To be connected with TRX TX GND.

⑬ RELAY Terminal
Connect with RELAY IN of your amplifier.
12 and 13 are normally connected inside of KP‐1.
When the SWR accidentally gets higher than the threshold value, KP‐1 automatically cuts off the line to protect your amplifier and/or antenna.
(Go to page 6 for how to set up)

⑭ RF OUT Connector
SO‐239 to connect your antenna⑮ RF IN Connector
SO‐239 to connect with your TRX

http://www.kojinsha.jp

News

Use your Privileges Properly – Ham Radio

June 21, 2022 in: News No comments

Due to some inquiry by Eric, KB0YDN, I decided to make this video discussing the incident of the Ham Firefighting Interference in Idaho Last year. This video is to address the issue and remind fellow Ham’s about the rules and laws par... Read more