Originally Posted by egnlsn
The Toner TDA35 distribution amp has 35dB forward gain with 20dB of slope control. It also has 18dB of reverse gain. I spec'd them for a townhouse development mainly because I could power them remotely, and was quite pleased at how stable they were sitting outdoors in pedestals.
I hadn't seen that line of amplifiers. 6 volt DC wallwart? Is it a switching wallwart? Amplifiers in that power range used to use 26 VAC, 1.3 amp or larger "filament" transformers
The specs are difficult to interpret. the 46dB/34dB (12dB tilt) intermod levels are surely with an analog load, but we are looking to operate it with a 20dB slope and digital channel load. FWIW, when one of the manufacturers of similar amplifiers began posting a ratings table for 50% digital/50% analog loads, they knocked 4dB off all their max numbers. With a full digital load and with 20dB of slope, I'm afraid I can only guess how it will effect low frequency channels that are 8dB further below the high ones than they are in the published specs table, but I'd say that if someone tried to launch at, say 35dB/15dB, they might come out of the 700' coax at -10/5dB, and so they might only use a gentile 15dB drop amp with an inline attenuator ahead of it. Talking dealer price, since Toner doesn't ordinarily sell retail over the phone, are we talking $300-$400 here, which is what the Blonder Tongue BIDAs have for dealer prices? I was figuring on an ACA-860 or 1000 which can commonly be bought retail for $130 along with a 6dB pad, and then maybe a 24dB "drop amp" and another 10dB pad at a midpoint, maybe 2/3s of the way to the cottage. and then any old drop amp at the cottage if necessary.
On further review, I now see that most "ACA" amplifiers that are selling cheap do not have return paths, whereas various ACA amps that include the suffix "R" do. While I carry sub-band diplexers that would enable me to work around that problem, you probably wouldn't want to get involved with something like that, so iof you do see any ACA amps at prices that are too good to pass up,just make sure they have return paths in them.
BTW, I see that this model amp can be purchased with a wide, 5-65 MHz return path. Toner has been making that option available in other large amplifiers for a long time now, but I have never seen any cable company use a wide return path. Has it become more common place?