Corpus Christi, TX: Channel Master CM7777 OR CM7778 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 5 Old 08-11-2019, 08:35 PM - Thread Starter
Member
 
bsr2002's Avatar
 
Join Date: Apr 2004
Location: Corpus Christi, TX
Posts: 64
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 10
Corpus Christi, TX: Channel Master CM7777 OR CM7778

What happened to these preamps? Mine finally crapped out on me after 17 years. Now I can't find one, not even used!

It's like they all disappeared. Can't even keyword it on eBay. And they are out of stock everywhere!

Anyone have one hiding in their stash they want to sell me? 😂
bsr2002 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 08-12-2019, 04:44 AM
AVS Forum Special Member
 
rabbit73's Avatar
 
Join Date: Apr 2008
Location: S.E. VA
Posts: 3,221
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 865 Post(s)
Liked: 370
Quote:
Originally Posted by bsr2002 View Post
What happened to these preamps? Mine finally crapped out on me after 17 years. Now I can't find one, not even used!

It's like they all disappeared. Can't even keyword it on eBay. And they are out of stock everywhere!

Anyone have one hiding in their stash they want to sell me? 😂
Hello, bsr2002

They are back ordered and hard to find.

Channel Master still shows the CM-7777HD Amplify in stock. It is a good preamp in a poor enclosure for outdoor use. I use it as an instrumentation amp for testing.
https://www.channelmaster.com/Amplif.../cm-7777hd.htm

The 7777 has gone through many design changes. Even if you could find one I would advise against it; it is too easily overloaded by strong signals. It has only one antenna input. The original 7777 was a good amp with two antenna inputs, one for UHF and one for VHF, if needed.

The best currently available preamp for your location would depend upon your signals. I would need to see a signal report for your location in the Flour Bluff section.

a TVFool report for Waldron Rd and Purdue Rd would look like this:
http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3d903812cf2647e c

a rabbitears.info report for that location would look like this:
https://www.rabbitears.info/searchmap.php?request=result&study_id=4041


Very strong signals there; wouldn't think you would need a preamp with an outdoor antenna

but you might not live near there

if you do, I would suggest the Antennas Direct Juice preamp.

If you can not measure it, you can not improve it.
Lord Kelvin, 1883
www.megalithia.com/elect/aerialsite/dttpoorman.html

Last edited by rabbit73; 08-12-2019 at 06:06 PM.
rabbit73 is offline  
post #3 of 5 Old 08-12-2019, 05:45 AM
AVS Forum Special Member
 
jspENC's Avatar
 
Join Date: Nov 2004
Location: Far away from the bias as possible.
Posts: 4,734
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 217 Post(s)
Liked: 40
I heard there were some issues with them failing... Maybe they pulled them? I would hope they would return with the issues resolved if this is the case...
jspENC is offline  
Sponsored Links
Advertisement
 
post #4 of 5 Old 08-12-2019, 12:49 PM
AVS Forum Special Member
 
tylerSC's Avatar
 
Join Date: Jun 2010
Location: Mauldin SC, 29607
Posts: 6,511
Mentioned: 4 Post(s)
Tagged: 1 Thread(s)
Quoted: 1235 Post(s)
Liked: 235
He my be referring to the original dual input versions of the CM-7777 and 7778 preamps. They were good preamps but unfortunately no longer available. But what is confusing, Channel Master used the same model numbers for the newer versions. The new 7777 has one input and 30db gain, and overloads very easily unless in a deep fringe application. But the newer 7777HD-Amplify is a good preamp with adjustable gain, although there is some concern about outdoor use. And their newest 7778HD-Amplify Pro Grade brings back the dual inputs and a good outdoor design. It also has adjustable gain and an FM trap. That would likely be the best replacement, although it is expensive at $99. The new Channel Master Pro Grade preamp is good, despite the confusing marketing and model numbers.
tylerSC is offline  
post #5 of 5 Old 08-12-2019, 03:08 PM
AVS Forum Special Member
 
rabbit73's Avatar
 
Join Date: Apr 2008
Location: S.E. VA
Posts: 3,221
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 865 Post(s)
Liked: 370
The 7778HD Amplify+ and 7778 are out of stock on the CM site. There is a US dealer that says they have a 7778HD for $130.

Some of the dealers in Canada say they have the 7778 with one input in stock.

If you can not measure it, you can not improve it.
Lord Kelvin, 1883
www.megalithia.com/elect/aerialsite/dttpoorman.html

Last edited by rabbit73; 08-12-2019 at 03:39 PM.
rabbit73 is offline  
Sponsored Links
Advertisement
 
Reply HDTV Technical



Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off