I am looking for a schematic (or possibly the module) for the 'UTB-1', (Universal Talk Back) made by RF Limited. The 'module' is obsolete.
I didn't even know these existed until I stumbled on it the other day.
Yes, I know... you don't need a fancy module to obtain talk back, but I like to collect rare or obsolete things like this and maybe try to build them for fun.
From what I gather, it's your basic talk back but it has a low-power audio amp built in. I can see where that would be advantageous if you don't have an amplified external speaker. I've built a few audio amps from time to time. They are pretty simple, but I'd really like to see the UTB-1 schematic and see how they did it.
I can always buy an amplified speaker with the TB feature, but it would be fun to try and make one from my boneyard of old parts.
I didn't even know these existed until I stumbled on it the other day.
Yes, I know... you don't need a fancy module to obtain talk back, but I like to collect rare or obsolete things like this and maybe try to build them for fun.
From what I gather, it's your basic talk back but it has a low-power audio amp built in. I can see where that would be advantageous if you don't have an amplified external speaker. I've built a few audio amps from time to time. They are pretty simple, but I'd really like to see the UTB-1 schematic and see how they did it.
I can always buy an amplified speaker with the TB feature, but it would be fun to try and make one from my boneyard of old parts.