Tandberg 3006A

Not much is documented about the Tandberg 3006A power amplifier. What survives is period magazine advertising and a single test report. The amp appeared in US audio magazines in 1984-85 as the TPA 3006A, priced at $995. A High Fidelity test (April 1985, p.52) listed the front dimensions as 17¼ by 3¼ inches, with a depth of 13¾ inches plus clearance for connections.

Tandberg's ad in Audio (September 1984, p.17) made big engineering claims. It listed a Voltage Comparator circuit, output-current capacity exceeding 25 amperes per channel, a tightly regulated toroidal transformer, and no negative feedback at all. The ads claimed a 500 V/µs slew rate and said TIM and DIM were unmeasurable. Nobody can tell from the surviving sources whether those were measured results or marketing.

Model: Tandberg TPA 3006A (power amplifier)
Price (1985): $995
Dimensions: 17¼ × 3¼ in (front), 13¾ in deep plus connector clearance
Claimed current capacity: >25 A per channel
Claimed slew rate: 500 V/µs
Circuit approach: Zero negative feedback, Voltage Comparator architecture
Transformer: Toroidal, tightly regulated

No service manual, production dates or collector-market data for the 3006A have been confirmed. It appears to have been a short-lived or low-volume model, likely Tandberg's attempt at a no-compromise solid-state design in the mid-1980s.