Bias Tee BOX DC manual

A bias tee is used to insert DC power into an HF signal to power remote antenna amplifiers or other devices. It is usually positioned at the receiving end of the coaxial cable to pass DC power from an external source to the coaxial cable running to powered device. A bias tee consists of a feed inductor to deliver DC to a connector on the device side and a blocking capacitor to keep DC from passing through to the receiver. Bias tees are used in a variety of applications, but are generally used to provide an RF signal and (DC) power to a remote device where running two separate cables would not be advantageous.

Applications

- Providing an RF signal and (DC) power to a remote device over one coax
- You can use bias tee on both sides as DC IN and OUT from RF coax
- Great for RX preamp BOX

example with Preamp Box and Bi-Dir beverage

version with PL SO-239 connectors

version with F connectors

Schematic

bias tee box dc schematic v01 qro.cz hamparts.shop

PCB

bias tee box dc board v01 qro.cz hamparts.shop

Settings

Variable Attenuator

bias tee box dc attenuator v01 qro.cz hamparts.shop

RF protection

bias tee box dc protection v01 qro.cz hamparts.shop

KIT Assembling

version with PL SO-239 connectors

version with F connectors

pcb after assembling all the parts

Part list

NAME	PART	VALUE
GL1, GL2	neon lamp	lamp 65V AC
D1 - D6	diode	1N4007
C1 - C8	capacitor	100nF 100V
C9	capacitor	100uF
PTC1	PTC fuse	THT 500mA
PTC2, PTC3	PTC fuse	THT 100mA
R1	resistor	THT 1K
R2	resistor	THT 150R
LED1	LED diode	3 mm
ATT	trimmer	200Ohm
L1, L4	inductor	100uH
CMCC	inductor	5mH
VAR1	varistor	26VDC
X1	wago	2-pole wago
CON	connectors	PL SO-239 or F

Product details

Included in package

Bias Tee assembled and tested or all parts for KIT version

Box dimensions (mm)	100x100x50 - PU box IP56
PCB dimensions (mm)	95x95 mm
Weight brutto (kg)	0.29 to 0.35 kg

Manufacturer:

Ing. Jan Šustr
ID 05476356, VAT CZ8407024780
Palachova 1777/7, 591 01 Žďár nad Sázavou, Czech republic, Europe

General instructions:

Please also read general instructions before handling the product.

European Union Declaration of Conformity

Manufacturer Ing. Jan Šustr (QRO.cz):

ID 05476356, VAT CZ8407024780
Palachova 1777/7, 591 01 Žďár nad Sázavou, Czech republic, Europe

declares that the assembled product:

BIAS TEE BOX DC

is compatible with the relevant Union harmonisation legislation directives:
EMC Directive 2014/30/EU
ČSN EN 61000-6-3 ed. 2
ČSN EN 61000-6-1 ed. 2 (333432)

On behalf of Ing. Jan Šustr (QRO.cz)
Ing. Jan Šustr, CEO
1st January 2023

KITS are always fun!

Something to do on a Sunday afternoon while it's raining outside all day. The preamplifier and the BIAS-T are already soldered. Remoteqth.com & QRO.cz kits are always fun to assemble. You could also buy them complete, but that way you also have a sense of achievement.

- Ronny, DM2RM -