10 Best 8 Channel HDMI to RF Modulators (November 2026)

The usual mistake in this category is buying the wrong kind of box. An analog modulator pushes one HDMI source onto channel 3 or 4 of a CRT. A digital modulator turns HDMI into QAM or ATSC channels for a coax network. An HDMI-over-Ethernet splitter does not touch RF at all. Pick the wrong one and an older TV shows nothing, or a distribution system gets one channel when it needs eight. The Best 8 Channel HDMI to RF Modulators depend on what is receiving the signal, how many sources you have, and whether the output has to be analog or digital.

The short answer: the kurtmark HDMI to RF Modulator Kit suits anyone connecting a console or streamer to an older coax-only TV, the VQP HDM61 suits the same job with a compact CH3/CH4 box, and the Thor Broadcast HDMI to Coax Modulator suits buyers who need digital ATSC or QAM channels on a coax network. The rest of the list covers dual-format analog modulators, eight-way HDMI-over-Ethernet distributors, an eight-input streaming encoder and a true eight-input digital RF modulator.

TL;DR: top picks at a glance

• Best overall: the kurtmark HDMI to RF Modulator Kit, because it ships with the HDMI cable, RG6 coax and power adapter and outputs NTSC on CH3 or CH4 with 80 ± 5 dBµV RF level.
• Best for digital channels: Thor Broadcast HDMI to Coax Modulator, which outputs ATSC, QAM, DVB-C/T or ISDB-T from 720p, 1080i or 1080p sources in a 9.6 oz body.
• Best for eight rooms over Ethernet: KEQINX 4K 1×8 HDMI Extender, one transmitter powering eight receivers over CAT6 at up to 70m/230ft for 1080P.
• Best for eight HDMI sources: Thor Broadcast 8-Input HDMI QAM Modulator, with eight HDMI ports, HDCP support and 1080p/60 input.

Best 8 Channel HDMI to RF Modulators Comparison (November 2026)

#	Product	Best for	Output	Inputs	Max Input Resolution
1	kurtmark HDMI to RF Modulator Kit	Retro CRT hookups	NTSC, CH3/CH4	1 HDMI	1080P
2	VQP HDM61 HDMI to RF Modulator	Compact analog conversion	NTSC, CH3/CH4	1 HDMI	1080P
3	Thor Broadcast HDMI to Coax Modulator	Digital coax channels	ATSC, QAM	1 HDMI	1080p
4	ADRFClub HDMI/RCA UHF Modulator	Mixed HDMI and RCA	NTSC or PAL, VHF/UHF	HDMI or RCA	Not listed
5	SatLink ST-7000	HD channel on coax	ATSC, QAM (J.83B)	HDMI or RCA	1080p
6	J-Tech Digital 1×8 HDMI Extender	Eight displays, IR control	HDMI over Cat5e/6	1 HDMI, 8 outputs	1080P (1920×1200)
7	KEQINX 4K 1×8 HDMI Extender	Eight displays, 4K	HDMI over CAT6	1 HDMI, 8 outputs	4K@30Hz
8	Thor H-HDMI-RF-PETIT	Thor ecosystem users	RF (type not listed)	Not listed	Not listed
9	ISEEVY 8-Channel HDMI Encoder	Eight-source streaming	IP streams	8 HDMI	1080P
10	Thor Broadcast 8-Input HDMI QAM Modulator	Eight HDMI to QAM	QAM, ATSC, ISDB-T	8 HDMI	1080p/60

1. kurtmark HDMI to RF Modulator Kit: Best CH3/CH4 NTSC Modulator for Older Coax TVs

• Output: NTSC on CH3 or CH4, 80 ± 5 dBµV RF level
• Input: HDMI 1.4 with HDCP 1.4, 1080P/1080i/720P/576P/480P
• Audio system: NTSC M, 4.5 MHz
• In the box: 1.2 m HDMI cable, RG6 coax cable, power adapter and cable, manual
• Power: 5 V DC

Pros:

• The package includes both the HDMI cable and the RG6 coax run, so nothing extra is needed to connect a streamer to an antenna-input TV.
• Built-in PLL frequency control keeps the RF carrier stable, which reduces drift and interference on a CRT.
• Input support runs from 480P up to 1080P, so consoles, PCs and DVD players all sync without manual resolution changes.
• Compatibility covers Fire TV Stick, Roku, Apple TV, PS5, Xbox, Nintendo Switch, PCs and DVRs.

Cons:

• Output is limited to two analog channels, CH3 and CH4, so it cannot feed several TVs on different channels.
• It converts HDMI to RF only and cannot work in reverse.
• NTSC only, so buyers on PAL systems need a different unit.

Best for: Someone reviving a CRT or antenna-only television with a console or streaming stick who wants one box and no extra cable shopping.

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The kurtmark HDMI to RF Modulator Kit wins on completeness. The VQP HDM61 has similar output but its package contents are not specified, while this kit lists every cable and the power supply. For a first-time analog hookup, that removes the most common failure: a missing or wrong cable.

The 80 ± 5 dBµV output level is strong enough for a single room. Two output channels is the key limitation. If the TV already sits on a shared coax run with other channels, CH3 or CH4 may clash with existing signals, and the ADRFClub HDMI/RCA UHF Modulator with its channel selector offers more room to move.

It is the wrong choice for digital-only coax networks or any build needing eight sources. Those buyers should look at the Thor Broadcast 8-Input HDMI QAM Modulator. For a bedroom CRT and a console, nothing else in this list is simpler.

2. VQP HDM61 HDMI to RF Modulator: Best Compact VHF Modulator for Retro Gaming

• Output: NTSC, CH3 at 61.25 MHz and CH4 at 67.25 MHz
• Input: HDMI 1.4 with HDCP 1.4, 1080P/1080i/720P/576P/576i/480p
• Size: 5 x 4 x 1.1 inches
• Power: 5 V DC, 0.5 A
• Housing: ABS

Pros:

• The body measures just 5 x 4 x 1.1 inches, so it tucks behind a CRT or on a shelf easily.
• It needs no driver installation and works straight from the box.
• Both interlaced and progressive formats, including 576i and 480p, are supported, which suits retro consoles and legacy sources.
• Buyer feedback points to straightforward setup and good value, including use with handheld PC gaming at 640×480.

Cons:

• Feedback on picture and sound is mixed, with some users reporting blurriness or audio feedback.
• Package contents are not specified, so cables may need to be bought separately.
• It offers the same two-channel analog limit as the kurtmark HDMI to RF Modulator Kit.

Best for: Retro gamers who want a small, simple CH3/CH4 converter and already own an HDMI cable and coax lead.

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The VQP HDM61 is the budget-minded pick for analog conversion. It publishes exact carrier frequencies for CH3 and CH4, which helps if you need to match an old TV's tuner. It also lists a 0.5 A current rating at 5 V.

Where it trails the kurtmark is in presentation. There is no confirmed cable bundle and no stated RF output level, so you are trusting the box to deliver adequate signal. Buyers sensitive to image softness on a larger CRT may prefer the stabilised carrier described for the kurtmark.

It is not the right tool for digital channels or multi-room distribution. The Thor Broadcast HDMI to Coax Modulator handles ATSC and QAM, and the KEQINX 4K 1×8 HDMI Extender handles eight displays. For a single retro setup, it is a sound compact choice.

3. Thor Broadcast HDMI to Coax Modulator: Best Digital ATSC/QAM Modulator for Coax Networks

• Output: DVB-C, DVB-T, ATSC or ISDB-T RF via F-type connector
• Encoding: HD MPEG2 with AC3 Dolby audio
• Input: HDMI, 720p/1080i/1080p
• Size and weight: 4.06 x 2.52 x 0.94 inches, 9.6 oz
• Warranty: 1 year

Pros:

• It converts HDMI into digital channels that any ATSC or QAM tuner can find, so modern TVs need no analog input.
• The pocket-sized body weighs 9.6 oz and measures under an inch thick.
• Dolby AC3 audio is carried on the digital stream instead of being dropped to stereo analog.
• A PC-based interface lets you pick the RF channel to use.

Cons:

• Configuration requires a computer and the vendor's software, which adds friction.
• It does not output analog NTSC, so a CRT without a digital tuner will not receive it.
• It handles one HDMI source, so a multi-source headend needs several units.

Best for: A small coax network, such as a bar, shop or home, that needs one HDMI source delivered as a digital channel to tuner-equipped TVs.

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The Thor Broadcast HDMI to Coax Modulator changes the type of output: instead of a fixed analog channel, it creates a proper digital channel, which any modern TV can scan. That is the right route when the coax is shared with antenna or cable signals.

Compared with the SatLink ST-7000, it publishes more of what matters: video resolutions, encoding type, output standards and a physical weight. The SatLink is a larger box with fewer published details.

Choose something else for a CRT, where the kurtmark HDMI to RF Modulator Kit fits, or if you need more than one source, where the Thor Broadcast 8-Input HDMI QAM Modulator is the closer match.

4. ADRFClub HDMI/RCA UHF Modulator: Best Dual-Input Modulator for Mixed Video Sources

• Inputs: HDMI (1.3 compatible) and composite RCA with stereo audio
• Formats: NTSC and PAL
• Frequency: VHF and UHF, up to 136 channels
• Controls: Channel display and selector switch, adjustable audio volume and video brightness
• In the box: Modulator body and power plug

Pros:

• It accepts both HDMI and composite RCA, so a modern streamer and an older VCR or console can share one modulator.
• Channel choice spans VHF and UHF with a digital display, which helps avoid clashes with existing signals.
• The F-type coax input and RF output let it sit in line with an antenna feed.
• Volume and brightness adjustments help match a CRT's characteristics.

Cons:

• The manual is confusing, and buyers often get it working by trial and error.
• Durability is inconsistent, with at least one unit reported failing within a few months.
• Maximum input resolution is not listed.

Best for: Hobbyists tuning a CRT or multi-TV antenna line who need to choose their own channel and mix HDMI with composite.

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The ADRFClub HDMI/RCA UHF Modulator is the most flexible analog option here. Unlike the VQP HDM61, which is fixed to CH3 and CH4, it can move to a quieter channel, a trick that helps if a nearby router causes interference.

The trade-off is setup effort. Expect to experiment, and note that the quality reports are mixed. It also does not state a maximum resolution, so check your source output.

If you want guaranteed simplicity, the kurtmark HDMI to RF Modulator Kit is easier. If you need digital channels, step up to the SatLink ST-7000.

5. SatLink ST-7000: Best Single-Channel ATSC/QAM Encoder for Coax Distribution

• Output: HD ATSC or QAM (J.83B) channel over coax
• Input: HDMI and RCA
• Channels: 1
• Size: 10 x 6 x 3 inches
• Weight: About 3.2 lb (1.47 kg)

Pros:

• It delivers 1080p video as a digital ATSC or QAM channel, so TVs with built-in tuners receive it directly.
• J.83B QAM output matches North American cable standards.
• It offers both HDMI and RCA inputs for different sources.
• The housing is substantial at about 3.2 lb, suggesting a fixed-installation device rather than a dongle.

Cons:

• Few specifications are published, including latency, audio format and power requirements.
• It is limited to one channel of output.
• It is much larger than the Thor Broadcast HDMI to Coax Modulator.

Best for: An installer adding one HD source to an existing coax network who wants ATSC or QAM output from a dedicated encoder.

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The SatLink ST-7000 sits in the same functional niche as the Thor unit above, but with a larger footprint and extra RCA input. If you want a rack or shelf unit with composite as a backup source, that matters.

Information gaps are the drawback. Without published encoding details, it is hard to compare it against the Thor Broadcast HDMI to Coax Modulator, which discloses MPEG2 and AC3.

For eight sources, it is the wrong choice, since it only has one channel. Look to the Thor Broadcast 8-Input HDMI QAM Modulator instead.

6. J-Tech Digital 1×8 HDMI Extender: Best Eight-Output HDMI-over-Ethernet Splitter with IR

• Distribution: 1 HDMI input to 8 outputs, with 8 receivers included
• Range: 1080P up to 164 ft over a single Cat5e/6 cable
• Resolution: 1080P, also 1920×1200
• Control: Bi-directional IR, 38-56 kHz, with EDID DIP switch
• Audio: Dolby TrueHD and DTS-HD Master Audio

Pros:

• Eight receivers are included, so the system distributes to eight displays out of the box.
• Bi-directional IR lets you control the source from any screen.
• A local HDMI loop-out on the transmitter provides a monitoring connection.
• The EDID presets improve compatibility between sources and displays.

Cons:

• It outputs HDMI over Ethernet, not RF, so it will not feed a coax-only TV.
• Range is capped at 164 ft, shorter than the KEQINX at 1080P.
• 4K support is not listed.

Best for: An installer sending one cable-box or media-player source to eight HDMI displays where remote control from each room matters.

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The J-Tech Digital 1×8 HDMI Extender is not an RF modulator, but it solves the underlying problem many "8 channel" searchers face: one source, eight screens. It does that with Cat5e/6 runs and no tuner involved.

Its main advantage over the KEQINX 4K 1×8 HDMI Extender is bi-directional IR and EDID control. The KEQINX has a longer 1080P range and 4K@30Hz support.

If your displays only have coax inputs, it will not work. Choose the Thor Broadcast 8-Input HDMI QAM Modulator instead.

7. KEQINX 4K 1×8 HDMI Extender: Best POC HDMI-over-CAT6 Splitter for 4K Distribution

• Distribution: 1 HDMI in, 8 CAT out, with 8 receivers
• Range: 70m/230ft at 1080P, 40m/131ft at 4K@30Hz
• Power: POC, one power supply for all receivers
• Audio: LPCM 7.1CH, Dolby TrueHD and DTS-HD Master Audio
• Warranty: 2 years

Pros:

• Power over cable means only the transmitter needs a power supply.
• The 1080P range of 70m/230ft is well beyond the J-Tech's 164 ft.
• 4K@30Hz support gives it a resolution edge over the J-Tech.
• Mounting ears and eight machine screws are included.

Cons:

• The 4K range falls to 40m/131ft.
• It is HDMI over Ethernet, not an RF modulator.
• IR and EDID functions are labelled, but details are less documented than the J-Tech's.

Best for: A site feeding the same 4K or 1080P source to eight screens, with long cable runs and a wish to avoid local power at each receiver.

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The KEQINX 4K 1×8 HDMI Extender simplifies wiring through power over cable. Eight receivers hang from a single powered transmitter measuring 295 x 82 x 18 mm, and each receiver is 79.5 x 69 x 16.5 mm.

The stated cable type is CAT6, so a Cat 8 ethernet cable is not required for this unit. Standard CAT6 meets the distances quoted.

It is the wrong choice for analog TVs or antenna feeds. Pick the kurtmark HDMI to RF Modulator Kit for a CRT, or the J-Tech Digital 1×8 HDMI Extender if bi-directional IR is the priority.

8. Thor H-HDMI-RF-PETIT: Best Thor-Branded RF Modulator for Existing Thor Systems

• Output connector: Radio Frequency
• Ports: 1
• Input voltage: 12 V DC
• Size and weight: 9.5 x 5.8 x 2.4 inches, 2 lb
• Resolutions and modulation type: Not listed

Pros:

• The dedicated RF connector and single-port design make the intended role clear.
• A 2 lb body suggests a sturdy installed device.
• It uses a standard 12 V DC supply.
• It comes from a broadcast-oriented brand that also makes the other digital modulators here.

Cons:

• Supported resolutions and modulation standards are not listed.
• The published electrical figures, including a 20 A current rating and 240 watts, are hard to reconcile with a small modulator, so confirm details before buying.
• It is larger and heavier than the Thor Broadcast HDMI to Coax Modulator that shares its model name.

Best for: Buyers who need to match an existing Thor Broadcast installation and can verify the specifications with the supplier.

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The Thor H-HDMI-RF-PETIT carries the same product name as the Thor Broadcast HDMI to Coax Modulator, yet the published dimensions and weight differ considerably. That alone makes comparison difficult.

For most readers, the better-documented Thor unit is the safer choice. The 8-input Thor unit is the stronger pick if you want more capability.

9. ISEEVY 8-Channel HDMI Encoder: Best H.265/H.264 Encoder for Eight-Source IP Streaming

• Inputs: 8 channels of 1080P HDMI
• Encoding: H.265 and H.264, AAC/MP3 audio
• Protocols: RTMP, RTMPS, RTSP, UDP, HTTP, SRT
• Size and weight: 9.06 x 5.91 x 1.73 inches, 0.78 kg
• Power: 12 V DC, upper temperature rating 45 °C

Pros:

• It is the only unit here that takes eight HDMI inputs and streams them separately over IP.
• Support for SRT, RTMP, RTMPS, RTSP, UDP and HTTP covers most streaming platforms and IP-TV headends.
• Logo and text watermarks can be applied on each channel.
• The 0.78 kg body is compact for an eight-input device.

Cons:

• It outputs IP streams, not RF, so a coax TV needs further hardware.
• The 45 °C upper operating limit calls for ventilation in a crowded rack.
• Setup assumes familiarity with streaming protocols.

Best for: A venue, school or broadcast team streaming eight cameras or consoles to platforms or an IPTV system.

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The ISEEVY 8-Channel HDMI Encoder matches the "8 channel" part of the search more literally than most, but it is a streaming tool. Its sources become IP streams; a separate decoder or modulator is needed to reach a TV.

A smaller 4 channel IPTV encoder is enough when fewer sources are involved. For larger sites the Thor Broadcast 8-Input HDMI QAM Modulator converts straight to RF.

10. Thor Broadcast 8-Input HDMI QAM Modulator: Best Eight-Port HDCP-Free Modulator for Headends

• Inputs: 8 HDMI ports, with CVBS input for closed captioning
• Output: QAM, ATSC or ISDB-T
• Resolution: Up to 1080p/60
• Encoding: MPEG2 video with AC3 Dolby audio
• Weight: 4.26 kg (about 9.4 lb)

Pros:

• Eight HDMI inputs turn into separate RF channels, matching the keyword most closely of anything listed.
• HDCP is supported, so it works with all HDMI sources.
• The unit carries 608/708 closed captioning, which commercial sites often require.
• Low-latency, plug-and-play operation drives unlimited TVs over coax.

Cons:

• At roughly 9.4 lb, it is a rack or shelf device rather than a small adapter.
• It is the least convenient option for a single CRT.
• Detailed configuration and channel-plan information is not published.

Best for: Sports bars, hotels and schools that distribute up to eight HDMI sources as digital channels across an existing coax plant.

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The Thor Broadcast 8-Input HDMI QAM Modulator is the true eight-source digital RF modulator in this list. It ranks last because most readers need simpler gear, not because it lacks capability. For a headend with eight feeds, it is the correct tool.

Where only four sources are involved, a 4 channel QAM modulator covers the need with less hardware. For a single CRT, the kurtmark HDMI to RF Modulator Kit is a better fit.

Buyer's Guide: How to Choose the Right 8 Channel HDMI to RF Modulator

The core trade-off is capability versus simplicity. Consumer analog modulators like the kurtmark HDMI to RF Modulator Kit convert one source to one fixed channel. Digital headend gear like the Thor Broadcast 8-Input HDMI QAM Modulator handles many sources but needs planning.

Before choosing, check these project details:

• Receiving TV type: CRT sets need analog NTSC, while modern TVs need ATSC or QAM.
• Number of sources: One source suits a single modulator, while eight sources need an 8-input unit or several boxes.
• Number of displays: Many screens may suit HDMI over Ethernet better than RF.
• Cable distance: Check the maximum run, such as 164 ft for the J-Tech unit or 230 ft for the KEQINX.
• Source copy protection: Confirm HDCP support for streamers and cable boxes.

Analog NTSC Versus Digital QAM and ATSC Output

Analog modulators like the VQP HDM61 and kurtmark HDMI to RF Modulator Kit generate a CH3 or CH4 carrier that CRTs tune to directly. They are simple, but they carry one channel and lower picture quality.

Digital modulators like the Thor Broadcast HDMI to Coax Modulator and SatLink ST-7000 produce ATSC or QAM channels. Modern TVs find them through a channel scan, and they coexist with cable signals.

Number of Inputs and Output Channels

Most units here take one source. The ADRFClub HDMI/RCA UHF Modulator accepts HDMI or RCA but still outputs a single channel. The Thor Broadcast 8-Input HDMI QAM Modulator and ISEEVY 8-Channel HDMI Encoder are the only ones with eight HDMI inputs.

If you need eight analog channels, there is no single box in this list, so plan on multiple modulators. Splitting one source to many screens is a different task, and the J-Tech and KEQINX extenders do it without RF.

Alternatives Over Ethernet and IP

HDMI-over-Ethernet units such as the J-Tech Digital 1×8 HDMI Extender and KEQINX 4K 1×8 HDMI Extender deliver an identical signal to eight HDMI displays. They suit sites with Cat5e/6 cabling, and they skip the RF stage entirely.

IP encoders like the ISEEVY 8-Channel HDMI Encoder send streams over a network. For larger streaming plans, a 16 channel encoder provides more headroom than eight inputs.

Resolution, HDCP and Source Compatibility

Check input formats. The kurtmark HDMI to RF Modulator Kit and VQP HDM61 support HDMI 1.4 and HDCP 1.4. The Thor Broadcast 8-Input HDMI QAM Modulator supports 1080p/60 and HDCP, which makes it versatile for cable boxes and streamers.

Analog output quality is always limited by NTSC, regardless of source resolution. The KEQINX extender is the only listed unit that specifies 4K@30Hz.

Frequently Asked Questions About 8 Channel HDMI to RF Modulators

What is an 8 channel HDMI to RF modulator?

It takes up to eight HDMI sources and converts each into a separate RF channel for a coax network. The Thor Broadcast 8-Input HDMI QAM Modulator is the closest match in this list, with eight HDMI ports and QAM, ATSC and ISDB-T output. Most other products are single-channel units.

Can I connect HDMI to an old TV with only a coax input?

Yes, with an analog modulator. The kurtmark HDMI to RF Modulator Kit and VQP HDM61 output NTSC on CH3 or CH4, so you tune the old TV to that channel. The kurtmark includes the HDMI and coax cables.

Do I need a digital or analog modulator?

It depends on the TV. A CRT with no digital tuner needs analog, such as the ADRFClub HDMI/RCA UHF Modulator. A modern TV on a shared coax plant needs digital, such as the Thor Broadcast HDMI to Coax Modulator or SatLink ST-7000.

Can one source feed eight TVs?

Yes, in two ways. An HDMI-over-Ethernet splitter such as the KEQINX 4K 1×8 HDMI Extender sends it to eight HDMI displays on CAT6. A modulator on a coax splitter feeds eight coax TVs from one RF channel.

Do these modulators work with HDCP-protected sources?

Some do. The kurtmark HDMI to RF Modulator Kit and VQP HDM61 list HDCP 1.4 support, and the Thor Broadcast 8-Input HDMI QAM Modulator states it works with all HDMI sources. Check the product specs for the others.

Why choose an encoder over a modulator?

An encoder creates IP streams for platforms or networks rather than RF channels. The ISEEVY 8-Channel HDMI Encoder supports H.265, H.264 and protocols such as SRT and RTMP. A modulator is better when the endpoint is a TV on coax.

Final Verdict: Which 8 Channel HDMI to RF Modulator Should You Buy?

Best 8 Channel HDMI to RF Modulators for most buyers start with kurtmark HDMI to RF Modulator Kit: it outputs NTSC on CH3 or CH4 at 80 ± 5 dBµV, accepts up to 1080P and ships with HDMI cable, RG6 coax and power adapter. Its main weakness is that it handles a single source on one of two analog channels, so it does not meet an eight-source brief.

For alternatives by use case, the VQP HDM61 is a compact analog option, the ADRFClub HDMI/RCA UHF Modulator adds channel selection and RCA input, and the Thor Broadcast HDMI to Coax Modulator and SatLink ST-7000 deliver digital ATSC or QAM channels to tuner-equipped TVs.

For specialist needs, the Thor Broadcast 8-Input HDMI QAM Modulator is the only genuine eight-input RF modulator, and the ISEEVY 8-Channel HDMI Encoder handles eight sources as IP streams. The J-Tech Digital 1×8 HDMI Extender and KEQINX 4K 1×8 HDMI Extender distribute to eight displays over Ethernet, while the Thor H-HDMI-RF-PETIT suits only buyers who can verify its specifications. If you are still undecided, count your sources and check whether each TV has a digital tuner, then pick the unit that matches both.