Old tube unit
- Thread starter Zander
- Start date
Help Support GroupDIY Audio Forum:
ruffrecords
Well-known member
It looks like an old PA amplifier with two mic and one gramophone inputs. All inputs probably high impedance. Might make a nice mono block - performance will be determined mostly by the output transformer. These can sound surprisingly good. I had an old RCA on in for restoration a few years back. Once I got it working I played some music through it and I really liked the sound. I then checked the frequency response and it was rubbish - but it still sounded pleasant.
Cheers
Ian
Cheers
Ian
Looks like a guitar amp to me. (Ian is correct about the original purpose, but who needs a 2-in 12 Watt PA today?)
Smoke-test (outdoors on dry board with long cord). Fix the failed bits. Play. It should handle guitar "fine", and with a tone somewhat different from a Fender or Marshall or Epi tube amp.
That assumes it has 4/8/15 Ohm output taps. Some old PA amps had only 70V, 25V, or even 500 Ohm outputs. If you have 25V with a CT (12.5V one side), that's an OK fit for 10-14 Watts at 8 or 16 Ohms; otherwise it is awkward.
Smoke-test (outdoors on dry board with long cord). Fix the failed bits. Play. It should handle guitar "fine", and with a tone somewhat different from a Fender or Marshall or Epi tube amp.
That assumes it has 4/8/15 Ohm output taps. Some old PA amps had only 70V, 25V, or even 500 Ohm outputs. If you have 25V with a CT (12.5V one side), that's an OK fit for 10-14 Watts at 8 or 16 Ohms; otherwise it is awkward.
