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BU-500

13 cm Up-Converter

Excellent 13cm UP converter for SSB CW FM FM-ATV DVB

RF in 100–1300 MHz → RF out 2365–2500 MHz

The BU-500 is a 13 cm up-converter for SSB, CW, FM, FM-ATV and DVB operation. It takes a 100~1300MHz IF input and converts it to 2365~2500MHz with more than 34dB of conversion gain, which makes it a good match for QO-100, the first geostationary satellite with a HamRadio transponder. The local oscillator defaults to 1968MHz for a 70cm IF signal and is customer-configurable from 1050MHz to 2700MHz in 1kHz steps. The same page also documents the companion HPA2225 13cm band high gain PA.

RF in 100–1300 MHz, RF out 2365–2500 MHz · Conversion gain > 34 dB · 1700 mW (SSB/CW/FM/ATV), 200 mW (DVB)

Datasheet — BU-500

08 · Up / Down Converter

Features

  • 01 Built for QO-100 — Good for QO-100, the first geostationary satellite with a HamRadio transponder.
  • 02 Configurable local oscillator — Default 1968MHz for 70cm IF signal, configurable by the customer from 1050MHz to 2700MHz in 1kHz step. Local Oscillator TK stability 2.5ppm (-30°…+75°C); for even more stability, an external 10MHz input is available.
  • 03 Two IF input versions — check before ordering — -15dBm and +20dBm IF version (please check your version before using it). Version 1 for multi-mode SSB CW FM ATV D-ATV, with input around -15dBm. Version 2 for SSB CW FM, with input around +20dBm (attenuator on PCB included). Please note the version you would like to buy.
  • 04 Rx/Tx switching — For the Rx <---> Tx switch, please use the IF signal.
  • 05 HPA2225 — companion 13cm band high gain PA — Amplification of signals with all types of modulation. Very suitable for transmitters with very low RF transmission output power (under 1mW output), such as Adalm Pluto or similar. The output port is protected by a circulator.

Specifications

BU500 specification

RF-in
100~1300MHz
Local Oscillator
Default 1968MHz for 70cm IF signal; 1050MHz to 2700MHz (configurable by customer in 1kHz step)
Local Oscillator TK stability
2.5ppm (-30°…+75°C); external 10MHz input available for even more stability
RF-output
2365~2500MHz
Conversion Gain
> 34dB
Output power
1700mW (SSB CW FM ATV FMATV); 200mW (DVB-T DVB-S)
DC power adaptor
12V 1A (9V…13.8V)
IF input version
-15dBm and +20dBm IF version

HPA2225 13cm band high gain PA

Bandwidth
2200…2500MHz
Gain
>50dB & 40,0W output
Small signal gain
>54dB
CW mode output
up to 40,0 Watt
Output port
Protected by circulator
INP / OUT / RFmonitor connector
SMA female
RF input power max.
2mW
Voltage
24…30 Volt, typical 28V, Icc 4 Amper max.
  • For the Rx <---> Tx switch, please use IF signal.
  • -15dBm and +20dBm IF version (please check your version before using it). Version 1 for multi-mode SSB CW FM ATV D-ATV, with input around -15dBm. Version 2 for SSB CW FM, with input around +20dBm (attenuator on PCB included). Please note the version you would like to buy.

Availability varies by model — current-production gear is in the eBay store, and every page links to its original write-up on the old site. Original product page →