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FM Signal Amplifer
205

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205 FM Signal Amplifier

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MSRP $390

The SIGNAL SLEUTH brings with it a whole new world of FM-stereo enjoyment. Whether it be Bach, rock, or current affairs, the SLEUTH will expand your world of FM-stereo entertainment, bringing you more FM stations, more clearly.

Also, with the SIGNAL SLEUTH bringing you a cleaner, more substantial signal, you will experience more of the depth and realism that is being broadcast from stations with "fine arts" quality, program signals.

What does the SIGNAL SLEUTH do?

  • amplifies weak FM signals cleanly
  • attenuates strong, harsh signals without coloration
  • stabilizes FM antenna (and FM cable) signals
  • separates interfering adjacent
  • station signals reduces multipath problems

Along with establishing a clearer, crisper sound, a most important attribute of the SLEUTH is its ability to establish and maintain a useable FM program signal level. In most cases, this will eliminate the annoying "flip-flop" stereo-to-mono-to-stereo switching usually experienced with many FM tuners having non-variable, automatic "blend" circuits.

Features:

  • Signal amplification variable from -30dB thru +30dB (30 times to gain) to bring weak stations to full quieting * and tame strong, harsh, local signals
  • Full tunability with a "hi Q," 600 KHz bandwidth. This adds some 70dB+ in Spurious Response selectivity
  • An electronic antenna switching system to bypass the SLEUTH's amplifier when not needed. Also with the SLEUTH's direct "in/out" Antenna Signal switching system, instant A/B comparison is always available
  • A low profile, rack-mount style cabinet in satin black
  • "Full quieting" is dependent on the tuner's requirement to establish a "50dB quieting level."

How well does the Power Sleuth perform?
In an independent test, using a commercially available FM tuner, the following percentile improvements were obtained with the SLEUTH on line:

  • Sensitivity (under 1dB limiting)
  • 170% Spurious Response Rejection -90%
  • Image Rejection -380%
  • Ultimate Selectivity was rated at 70dB+

Also, the total harmonic distortion (THD) remained unchanged, indicating the Sleuth added no measurable distortion of its own.

Specifications:

Circuit
3 high quality rf stages
tuning
varactor using gold-plated, long-life controls
gain
variable -30dB thru +30dB (27dB typical)
tuning range
continuously variable 87 thru 109 MHz
bandwidth
600 KHz (hi Q)
noise figure
better than 4dB
antenna
input/output 75 ohms
max. rf output
prop. to input but not more than 1.0Vrms
power required
115vac @ 25 watts
O.A. dimensions
16.0"W x 1.75"H x 5.5"D
Weight
8 lb (3.6 kg)