--- product_id: 71089580 title: "Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain" brand: "channel master" price: "FREE" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.gr/products/71089580-channel-master-cm-7777hd-tv-antenna-amplifier-with-adjustable-gain store_origin: GR region: Greece --- # Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain **Brand:** channel master **Price:** FREE **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain by channel master - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/71089580-channel-master-cm-7777hd-tv-antenna-amplifier-with-adjustable-gain) ## Best For - channel master enthusiasts ## Why This Product - Trusted channel master brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Amplify is an easy to install, professional-grade TV antenna amplifier designed to work with any television antenna to boost signal strength and improve signal quality. May increase the number of channels received by the antenna. Amplify's innovative circuitry is specifically built to support the newest digital and high definition broadcast standards. The heavy-duty weatherproof housing will accommodate installation outdoors as well as indoors. Review: Fantastic device, works great. Way better than the winegard I replaced with it. Hit buy! - All I can say is WOW! Replaced a very poorly made Winegard powered preamp with this Channel master beauty. The Winegaurd power unit was poorly made and kept shorting out ...I actually had two units and both had the same issue. When functioning properly the wineguard barely pulled in most of the U.S. channels. In bad weather, most stopped receiving. The channel master is way better built, the power supply is solid. I am on the lake in Toronto. See the pic, that’s Buffalo / Niagara in the background. I now get every single U.S. station in Buffalo NY, continuously and without any interference ...this thing works like a charm. It is set on the low amp setting. Very easy to setup. The indicator light on the amp at the antenna end is a nice touch. I am so glad I got this product. Review: Amazing amplifier - can actually be too strong! - I've been using a flat fractal-style TV antenna for my living room TV since about 2015 and it did a great job picking up local stations about 99% of the time. I later added a SiliconDust HD HomeRun into the mix so I could share the signal to all the TVs in the house via my Emby media server. Unfortunately, due to changes in the location of local broadcast towers, I had to locate the antenna in my living room in an annoying location for it to work properly. I purchased this amp and a 'matching' Channel Master STEALTHtenna (see my review on that product). I initially installed the booster in high-gain mode and went from 11 channels to 15! This was a great improvement - and it worked great... for a while. Fast forward to last week and I realized I couldn't tune in some of the local channels, but could still see some more distant ones. I pull out the iPhone and fire up "Signal GH" again and I see that the signal strength is 100% but my signal quality is really low. Since I've been working with TV antennas long enough, I see the problem and realize what an ID:10T I've been - and immediately proceed to flip the booster to low-gain mode. Now I get *25* channels many with 100% signal strength and near 100% signal quality. I can now see all the local repeaters that were interfering with the main signal. I also now receive several channels from over 100 miles away, past the local group of towers. I also now see a host of channels from about 65 miles away, picked up on the BACK side of the antenna. Of the 25 channels I can now see, about 17 are worth keeping in my channel lineup. So kids, the moral of the story: don't be like me and immediately assume that you need 30db of boost when 17db is plenty. ------------------------- My notes on installation: Installation is a snap... assuming you've installed an outdoor antenna before. I mounted my new STEALTHtenna and pre-amp on the j-mount for my old satellite dish. (after removing the dish of course) I installed short (18-inch) pigtail cable between the antenna to the correct side of the pre-amp. Then connected the longer run to the indoors via a grounded lightning suppressor to the (included) power injector. The injector is powered by a USB adapter (cable and adapter included.) For the main run, I reused the high-quality quad-shielded RG6 I previously installed for my satellite dish. All terminations have good quality waterproof compression F connectors. I usually seal everything with waterproof tape for extra protection, but I couldn't find my roll of coax tape - so I may come back to that later if needed. Even the local cable companies never seem to use the tape anymore since THEY switched to waterproof connectors, so maybe I don't either. Using the included zip-ties, I attached the the pre-amp to the base of the j-pole below the antenna. I don't really like how it looks, so I may re-mount it later on - especially if I ultimately decide to install a taller mount or an extension pole. ## Features - Improves signal quality - Indoor/Outdoor heavy-duty housing - Adjustable amplification (17 dB/30 dB) with flexible USB powering options - Blocks LTE interference from 3G/4G Smartphones and transmitters with EMI & FM Out of band filtering (Does not pass FM signals) - Includes Amplify TV antenna amplifier, USB Power Cord, Power Inserter, Power Adapter, (2) mast straps and (3) mounting screws ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01FTX7M26 | | Antenna | Television | | AntennaDescription | Television | | Brand | Channel Master | | Brand Name | Channel Master | | Colour | Nope | | Customer Reviews | 4.2 out of 5 stars 1,784 Reviews | | Global Trade Identification Number | 00020572177771 | | Item Dimensions L x W x H | 12.7L x 5.7W x 3.2H centimetres | | Item Weight | 12.5 Ounces | | Manufacturer | Channel Master | | Manufacturer Part Number | X7M26 | | Model Number | X7M26 | | Product dimensions | 12.7L x 5.7W x 3.2H centimetres | | UPC | 020572177771 | ## Product Details - **Brand:** Channel Master - **Item dimensions L x W x H:** 3.13 x 2.75 x 5.13 inches - **Manufacturer:** Channel Master - **Mounting Type:** freestanding - **Output Power:** 10 Milliwatts ## Images ![Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain - Image 1](https://m.media-amazon.com/images/I/61KFCT0DfXL.jpg) ![Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain - Image 2](https://m.media-amazon.com/images/I/818pkep+1ZL.jpg) ![Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain - Image 3](https://m.media-amazon.com/images/I/71D0weK7YOL.jpg) ![Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain - Image 4](https://m.media-amazon.com/images/I/81+0madpP2L.jpg) ![Channel Master CM-7777HD TV Antenna Amplifier with Adjustable Gain - Image 5](https://m.media-amazon.com/images/I/71LuWkm9C8L.jpg) ## Questions & Answers **Q: With my hdb91x antenna plus the cm-7777hd from savannah i do receive charelston and jacsonville. how do i keep them with no fading away.** A: 1.factors to consider: wooded area, valley, out door antenna....attic area....mine is in the attic 2. I have 2 units one at the antenna and and another that connects to the cable outlets to the TVs ...very little problems prior to that I was having the same problem...also check on line for best antenna direction(use compass for station signals) you'll need two people ...one for antenna adjustment second person to view best reception for your channels use cell phone ---walkie talkies---loud voice...better known as a " big mouth"...its trial and error...you'll eventually set it right...its take time ....so be patient...once you locate the right spot you will know....if then the is some disturbance...then just tweak it....good luck Just nto let you know my is working great...I have 5 tvs **Q: Can i use this preamplifier (cm-7777hd) and the ultra mini 2 distribution amplifier (cm-3412) same time?** A: Yes you can! That is what I had to do to get a strong signal to all of my TVs. I would buy an extended warranty with both items. The warranty sucks and mine died right after it was over. Now I have a new one with a Square Trade warranty just in case this one dies early too. **Q: Can I use this on a antenna that’s already amplified?** A: Yes, but you run the risk of overloading the front end of your TV receiver. That could lead to damage or a poor picture. If your TV can display the received signal strength from your antenna, check the signal strength before installing the CM-7777HD. If you see two or three bars out of 5, you can try the CM=7777HD on low amplification and immediately test the received signal strength again. If you see 3 or 4 bars you are good. If you see 5 bars you may be ok. I have my CM-7777HD installed at the antenna. I use a splitter to serve two TVs and have a second amplifier installed on each leg after the splitter. Hope this helps. **Q: This pre amp keeps loosing power green led shuts off no signal unplug power insertion plug back in works 10 to 20 minutes this is a new unit anyone ha** A: Return it. I purchased one along with a Channel Master 100 directional outdoor tv antenna long range CM3020, and struggled with it for a week all the while communicating with channel master. Still received only PBS station lost 29 channels. Finally removed it and plugged old radio shack preamp and tada! Recovered 29 channels. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fantastic device, works great. Way better than the winegard I replaced with it. Hit buy! *by C***M on 18 October 2020* All I can say is WOW! Replaced a very poorly made Winegard powered preamp with this Channel master beauty. The Winegaurd power unit was poorly made and kept shorting out ...I actually had two units and both had the same issue. When functioning properly the wineguard barely pulled in most of the U.S. channels. In bad weather, most stopped receiving. The channel master is way better built, the power supply is solid. I am on the lake in Toronto. See the pic, that’s Buffalo / Niagara in the background. I now get every single U.S. station in Buffalo NY, continuously and without any interference ...this thing works like a charm. It is set on the low amp setting. Very easy to setup. The indicator light on the amp at the antenna end is a nice touch. I am so glad I got this product. ### ⭐⭐⭐⭐⭐ Amazing amplifier - can actually be too strong! *by T***Y on 27 December 2023* I've been using a flat fractal-style TV antenna for my living room TV since about 2015 and it did a great job picking up local stations about 99% of the time. I later added a SiliconDust HD HomeRun into the mix so I could share the signal to all the TVs in the house via my Emby media server. Unfortunately, due to changes in the location of local broadcast towers, I had to locate the antenna in my living room in an annoying location for it to work properly. I purchased this amp and a 'matching' Channel Master STEALTHtenna (see my review on that product). I initially installed the booster in high-gain mode and went from 11 channels to 15! This was a great improvement - and it worked great... for a while. Fast forward to last week and I realized I couldn't tune in some of the local channels, but could still see some more distant ones. I pull out the iPhone and fire up "Signal GH" again and I see that the signal strength is 100% but my signal quality is really low. Since I've been working with TV antennas long enough, I see the problem and realize what an ID:10T I've been - and immediately proceed to flip the booster to low-gain mode. Now I get *25* channels many with 100% signal strength and near 100% signal quality. I can now see all the local repeaters that were interfering with the main signal. I also now receive several channels from over 100 miles away, past the local group of towers. I also now see a host of channels from about 65 miles away, picked up on the BACK side of the antenna. Of the 25 channels I can now see, about 17 are worth keeping in my channel lineup. So kids, the moral of the story: don't be like me and immediately assume that you need 30db of boost when 17db is plenty. ------------------------- My notes on installation: Installation is a snap... assuming you've installed an outdoor antenna before. I mounted my new STEALTHtenna and pre-amp on the j-mount for my old satellite dish. (after removing the dish of course) I installed short (18-inch) pigtail cable between the antenna to the correct side of the pre-amp. Then connected the longer run to the indoors via a grounded lightning suppressor to the (included) power injector. The injector is powered by a USB adapter (cable and adapter included.) For the main run, I reused the high-quality quad-shielded RG6 I previously installed for my satellite dish. All terminations have good quality waterproof compression F connectors. I usually seal everything with waterproof tape for extra protection, but I couldn't find my roll of coax tape - so I may come back to that later if needed. Even the local cable companies never seem to use the tape anymore since THEY switched to waterproof connectors, so maybe I don't either. Using the included zip-ties, I attached the the pre-amp to the base of the j-pole below the antenna. I don't really like how it looks, so I may re-mount it later on - especially if I ultimately decide to install a taller mount or an extension pole. ### ⭐⭐⭐⭐⭐ Very Pleased *by D***R on 16 November 2019* Works very well with Channel Master’s EXTREMEtenna 80. I am very happy with my purchase. I decided to put up an antenna after Direct TV decided to stop carrying the local Fox and NBC stations due to a contract dispute. I first purchased an antenna advertised to receive signals from 150 miles away. I used my umbrella stand and placed it on a pole on my deck. It didn’t work very well but I was happy it received the local Fox station so I could watch most of the Seahawks games again. I also received Telemundo and ION. However, I couldn’t get any other major networks. Hoping to get a few more channels, I purchased a Clearstream 2Max that I hooked up a Winegard LNA-200 Boost XT HDTV Preamp. Unfortunately, it didn’t do any better than my cheap 150 mile antenna. I then tried out a small RCA Yagi and connected it to the wine guard preamp. I ended up getting a total of 7 stations including 4 additional PBS stations. It would occasionally pull in another 9 stations including ABC and/or CBS, but not often. NBC was also impossible to get with the yagi setup. Determined to get more stations, I began researching how to get better reception. I learned a lot from watching You Tube videos by a guy named Danny Hodges. He has a You Tube Channel called Southern Ideas and it has a lot of good information about antennas including how to make your own. I did what he said and made an an antenna out of wood with copper whiskers. When I first tried it out with the Wineguard Preamp, I got 16 stations including CBS and ABC. I still couldn’t get NBC. It performed about the same as the RCA yagi except it did a better job maintaining the signal for CBS (i.e. the signal for CBS was much stronger and didn’t constantly disappear). While testing alternative antennas, I wasn’t paying enough attention and I connected the wire that was supposed to be going to the transformer on the antenna to the connector on the Wineguard preamp that’s was going to the tv. I also connected the wire that was supposed to be going to the TV to the other connector on the preamp. Unfortunately, I fried the Wineguard preamp. Because my homemade copper whisker antenna performed the best of all the antennas I tested, I decided to buy the Channel Master EXTREMEtenna 80 which was bigger but similar in design to my homemade antenna. I also bought the channel master preamp because of its variable db gain feature and It appeared to be fairly durable based on the reviews I read. Anyhow, I am so glad I bought Channel Master’s antenna and preamp. I live in a somewhat low lying area with hills around me and tv towers that are approximately 40 miles away. I now get 18 channels including all the major networks (ABC, CBS, FOX, NBC, etc. I now almost never lose reception of any of my stations other than occasionally losing NBC (channel 25.1 and its other station 25.3). Still NBC come in well most of the time. The antenna is still attached to the pole on my deck and I am no longer paying Direct TV $130.00 a month. ## Frequently Bought Together - Channel Master Amplify - Adjustable Gain TV Antenna Pre-Amplifier, Built-in LTE Filter, 17-30dB Gain, Compatible with Non-Amplified TV Antennas, Increases Signal Strength, Indoor/Outdoor - Channel Master Splitter 2 | 2-Way Splitter Distributes Digital HDTV Antenna Signal to 2 TVs, One Input and Two Outputs, Power Passing for Preamplifiers and Boosters, Low-Loss Design, Indoor/Outdoor - Channel Master LTE/5G Filter – Reduces Pixelation & Signal Issues from LTE, 4G, 5G Interference, Indoor/Outdoor Use, Built-in O-Ring for Weather Protection, Enhances OTA Digital HDTV Signal Quality --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/71089580-channel-master-cm-7777hd-tv-antenna-amplifier-with-adjustable-gain](https://www.desertcart.gr/products/71089580-channel-master-cm-7777hd-tv-antenna-amplifier-with-adjustable-gain) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-08-21*