Category:Vintage (Pre 1960, some recorders were so good, they belong in above categories)
Country of Manufacture:USA
Release dates:1953 - 1956
Speeds: 3 3/4, 7 1/2, 15
Max Reel Size("): 7"
Number of heads: 3
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Voltage(s): 110-120v, 220-240v
Frequency Response:(all 2 dB): 15 ips: 30-15kHz
Wow and Flutter:15 ips: < 0.15 % RMS. 7½ ips: < 0.2% RMS
Signal-to-Noise Ratio:60db (full track)
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Announced in late 1953, the all-new Ampex 350 was specifically designed for the recording studio, featuring a new 30° sloped deck plate and control panel. All transport controls were electrically switched via push-buttons, allowing remote control functionality.
Speeds were either 3¾ and 7½ ips or 7¾ and 15 ips with a frequency response up to 15kHz at the faster speeds.Full tape speed was achieved within 0.1 seconds from pushing the start button. Independent record and playback electronics plus separate record and playback heads allowed for off-tape monitoring. The 350 was offered in single or dual channel configurations, and also available in portable or rack-mountable versions.
The stereophonic version was designated 350-2P and a special three-channel version (350-3P) was also produced.
Bias frequency: approx 100kHz / Crosstalk: (2 channel stereo) exceeds 55db at 400Hz / Valve complement: 3 x ECC83 (12AX7). 2 x 12AU7. 1 x 12AT7, 1 x 6X4 for each channel / Start / Stop times: start: 1 / 10th sec to full speed stop: At 15 ips, tape moves less than 2″ when stopped / Timing accuracy: within 0.2% (3.6 seconds over 30 minutes) / Rewind speed: less than 70 seconds for 2400ft tape / Inputs: low impedance microphone or 600 ohm line, balanced or unbalanced – switchable / Outputs: plus 8 dbm output into 600 ohms, balanced or unbalanced / Dimensions: (with console) 48″ high x 29″ deep x 25″ wide / Weight: (with console) 168 lbs / full or half track mono or stereo, three channel version available also