5 out of 5
Holland Electronics HOL-SBD-204 258-1218Mhz Sub-Band Diplexer - 1-204Mhz
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Pricing Note
Product Description
Manufacturer part number: HOL-SBD-204
Designed to Meet the Critical Requirements for DOCSIS 3.1 Upgrades High Isolation, High Rejection, and Excellent Group Delay Expanded Pass-Band Built-in Ground Screw Small Form Factor
Specifications:Low Band Frequency Range: 1 - 204MHz High Band Frequency Range: 258 - 1218MHz Insertion Loss:
Low Band: 1 - 204MHz
High Band: 258 - 1218MHz Passband Flatness:
Typical: 0.8dB
Q.C. Limit: 1.0dB Max Return Loss:
Low Band: -13dB
High Band: -12dB Min Stop Band Attenuation:
Low Band: -50dB
High Band: -45dB Min Group Delay:
Q.C. Limit: 20ns Max
Low Band: P-P over any 1 MHz Band
High Band: P-P over any 3.58 MHz Band Operating Temperature: -40°C ~ +60°C Impedance: 75 Ohm Connector: F-Type Female
The Holland Electronics' SBD-204 diplexer is utilized for either combining or separating sub-band and forward path signals. The SBD-204 operates within the 1-204Mhz in the sub-band, and 258-1218Mhz in the forward path. Offers excellent insertion loss performance from distribution system to head-end. This diplexer can also be used to enable unidirectional amplifiers to provide bi-directional amplification.
Features:Specifications:
Low Band: 1 - 204MHz
High Band: 258 - 1218MHz
Typical: 0.8dB
Q.C. Limit: 1.0dB Max
Low Band: -13dB
High Band: -12dB Min
Low Band: -50dB
High Band: -45dB Min
Q.C. Limit: 20ns Max
Low Band: P-P over any 1 MHz Band
High Band: P-P over any 3.58 MHz Band
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
By Gary Morgan
Date: October 15, 2025
Using two basic HDTV antennas pointed in different directions to pick up different channels. Important to use two of the same antennas with the same length cables to keep in phase as others have noted. These antennas have amplifiers but using this to combine signals provided better signals removing the amplifiers. Be sure to test with and without. Using with HD Homerun and Channels DVR. Works great!
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By robert b.
Date: September 02, 2025
I just needed a '2 In/1 Out' adapter for a dual antenna set up I have. I know the others say they work either way but most do not. I purchased this one and it works great. I now pull in more TV channels thank before and I don't have to switch back and forth between antenna.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Mjolner
Date: February 22, 2025
Cable Cutter here. There is a big city north of us and all TV channels (except local) are from there. I installed the (directional) antenna in the attic and aimed it (north) at the antenna farm for the city's TV stations. Unfortunately, the local station (south) would fade out during storms. Purchased a cheap antenna (for the local station) and used this combiner to feed both signals to the TV. No more problems with the local station.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Terril
Date: August 27, 2024
Great
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Dwight
Date: July 17, 2024
simple to install and to hook up pretty straight forward
Rating: 
[4 of 5 Stars!]
[4 of 5 Stars!]
By Thomas L
Date: April 16, 2024
Needed a new diplexer DTV rep would/ could not change .. No sweat
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]