It's Altec week in The Dungeon.
Or should I say, Holy Anaheim!, what's that? (Anaheim, California was where they were made).
This is an Altec 1592B Mixer Amplifier - a 5-channel preamp/mixer. Sort of a super deluxe version of the 1589B I just worked on.
It takes up three rack spaces.
If five inputs weren't enough, Altec sold a six-input mixer, the 1599A, that could be connected to the 1592B to give more inputs. In fact, the manual for the 1592B shows how to connect 5 of them with a 1592B to give 30 inputs!
What I'm wondering is how one keeps all these model numbers straight. Funny thing is, I'm actually starting to know which is which.
Anyway, as with the 1589A, I'm going to recap and upgrade this one so I can use it for recording.
Note the two filter cans as well. I'll be replacing these.
One of the 5 input transformers (it came with 1588Bs) is not plugged in - that's the one I dissected in the last post.
It does look a little overwhelming, but there are really three main sections: first, the chassis itself, which contains the input jacks, the sockets for the input transformers, the filter caps, and the front panel and its controls.
I've also highlighted the location of the two filter cap cans. They're riveted to the chassis, so I'll be drilling the rivets out.
There are two connectors to remove. Mine were really stuck on - I just gently but firmly wiggled back and forth and they came off.
Three of mine came out easily. One was recalcitrant.
Aven Adjustable Circuit Board Holder and we're ready to go to work.
In front of the board you can see its schematic and layout. I marked it up so I'd know what to replace and with what component.
Next I'll change out some of the resistors. Takman REY metal film for transistor collectors and Takman REX carbon film for signal resistors.
Altec 1592B Rebuild Project
Part 1: Overview and Initial Dissassembly (This page)
Part 2: Power Amplifier/Main Board
Part 3: Tone Control Board
Part 4: Filter Capacitor Replacement
Part 5: Reassembly