freshtapescent
Well-known member
- Joined
- Jan 25, 2014
- Messages
- 45
Hey All,
Came across a pair of late 40's Hollywood-era Altec TB-105 Transformers. Hard to find any info about them and they're not in the only catalog I could drum up from that era. http://altec.bayoucables.com/AltecTransformers.pdf (Thx to Bayou Cables for their generosity in sharing + hosting!)
It sure looks like the TB-XXX series are all input transformers, and from that era likely going to be suited to hitting some grids, just curious about any other information, intended purpose, amplifiers that used them, etc. They're not in a large mu-metal square can like the TB-103, in a smaller round can 1.5" tall, 1.5" diameter, potted. I surmise they're probably intended for line-level inputs that don't need lots of shielding? They're also a single primary, which seems like an obvious cost saving measure as almost all other offerings in that catalog whether hi or lo level seem to have at least a few taps on the primary.
DCR Primary: 175Ohms
DCR Secondary: 1.55k
Voltage Ratio: 1:8
Impedance Ratio: 1:64
Came across a pair of late 40's Hollywood-era Altec TB-105 Transformers. Hard to find any info about them and they're not in the only catalog I could drum up from that era. http://altec.bayoucables.com/AltecTransformers.pdf (Thx to Bayou Cables for their generosity in sharing + hosting!)
It sure looks like the TB-XXX series are all input transformers, and from that era likely going to be suited to hitting some grids, just curious about any other information, intended purpose, amplifiers that used them, etc. They're not in a large mu-metal square can like the TB-103, in a smaller round can 1.5" tall, 1.5" diameter, potted. I surmise they're probably intended for line-level inputs that don't need lots of shielding? They're also a single primary, which seems like an obvious cost saving measure as almost all other offerings in that catalog whether hi or lo level seem to have at least a few taps on the primary.
DCR Primary: 175Ohms
DCR Secondary: 1.55k
Voltage Ratio: 1:8
Impedance Ratio: 1:64
