HARMAN KARDON CITATION TWENTY THREE AM/FM ACTIVE TRACKING STEREO TUNER 23 NICE

Description

For sale is a High End HARMAN KARDON CITATION TWENTY THREE AM/FM Stereo Tuner. This tuner is in nice condition tested and works great! Tunes in stereo stations well and sounds great. The faceplate is in good condition, no major scratches dents or missing buttons the cabinet is clean as well no dents or gouges as well all buttons are present and display and lights work as well. Please see pictures for details.
There are some fine reviews on this model.
Harman Kardon Citation Twenty Three Tuner Review price specs - Hi-Fi Classic (hifi-classic.net)
From the web:
FM Section Usable Sensitivity, Mono: Normal, 10.8 dBf; Hi Q, 14.7 dBf.
50-dB Quieting Sensitivity: Normal mono, 15.2 dBf; Hi Q mono, 19.1 dBf; normal stereo, 36.5 dBf; Hi Q stereo, 40.4 dBf.
S/N: Mono, 84 dB; stereo, 75 dB.
THD at 1 kHz: Normal mono, 0.06%; Hi Q mono, 0.2%; normal stereo, 0.08%; Hi Q stereo, 0.2%.
Stereo Separation at 1 kHz: Nor mal, 55 dB; Hi Q, 35 dB.
Capture Ratio: Normal, 0.75 dB; Hi Q, 1.75 dB.
Alternate-Channel Selectivity:
Normal, 65 dB; Hi Q, 75 dB Adjacent-Channel Selectivity:
Normal, 5 dB; Hi Q, 30 dB.
I.f. Rejection: 90 dB.
AM Rejection: 70 dB.
Image Rejection: Normal, 75 dB; Hi Q, 85 dB.
Spurious-Response Rejection: 115 dB.
SCA Rejection: 70 dB.
Output Level: 1.0 V
AM Section Sensitivity: 12 µV/m
Alternate-Channel Selectivity: 60 dB
Image Rejection: 45 dB
I.f. Rejection: 65 dB.
S/N: 55 dB.
General Specifications
Dimensions: 17 3/8 in. W x 2 3/4 in. H x 14 1/4 in. D
Weight: 15 lbs. serial # 06347
Price: 5.
Harman/Kardon does not designate a new audio component as part of their prestigious Citation series unless there is really something special about it. Their recently introduced Citation Twenty-Three AM/FM tuner merits the designation on many counts. Physically, the tuner is extremely attractive, with its softly rounded buttons, understated indicator lights, and low silhouette. But it's what lies behind the tastefully designed front panel that really impressed me.
To the best of my knowledge, the engineers at H/K worked on the Twenty-Three for the better part of two years. The result is a tuner that is ideally suited for those areas where the FM dial is populated by a great many signals and that means just about every major city in the United States. Two innovative design features make this so: A novel type of narrow i.f. mode and an unusual fine-tuning circuit. Many tuners offer two i.f. modes-a wide one that can be selected when there is no interference and a narrow one that uses sharp band-pass filters in an attempt to improve rejection of adjacent-channel interference. Unfortunately, such sharp filters also introduce phase and amplitude errors that often decrease separation and increase distortion. The Citation Twenty-Three provides two i.f. modes too: A conventional wide mode and another that H/K calls "Hi Q." The circuit details remain secret (H/K is waiting for patents to be granted), but I can reveal this much about it: Instead of filtering the "edges" of a desired bandwidth, the Hi Q circuit employs a phase-locked loop (PLL) that locks onto the FM carrier itself, isolating the center frequency of the desired listening band and then limiting the allowed bandwidth to the maximum deviation caused by the incoming modulated signal. By limiting the PLL's tracking range to just slightly more than the modulation range (approximately 80 kHz on either side of the carrier's center frequency), only the signal needed for good separation and relatively low distortion is passed through to the rest of the i.f. system and on to the quadrature detector. Because the PLL circuit does not em ploy resonant (tuned) elements, no phase shift is introduced; thus, stereo music signals and the 19-kHz pilot signal associated with stereo transmission retain correct relative phase.
The second innovative feature incorporated in the Twenty-Three addresses one of the disadvantages of quartz-locked, frequency-synthesized tuning-the lack of latitude in tuning to the actual center frequency of the received signal. Harman/Kardon's engineers have solved this problem with an analog fine-tuning circuit that allows you, when in Hi Q mode, to tune away from the assigned center frequency by as much as 25 kHz in either direction. This can further improve adjacent-channel rejection and eliminate interference. Such tuning flexibility is also important if you subscribe to cable FM, since cable operators are not always as careful as broadcast stations when it comes to frequency allocations and accuracy.
Control Layout
At the left end of the front panel are the "Power" button (with built-in indicator LED), a "Memory" button for setting station presets, and a button that's used, like the shift key on a typewriter, to enable you to store 16 AM and FM stations (in any combination) with only eight actual preset buttons.
The preset buttons, in a horizontal row, are labeled with two sets of numbers (1 through 8 above the buttons, 9 through 16 below). When one of these preset buttons is pressed, an LED glows at its top or at its bottom, depending upon whether the "shift" key has been pressed or not. An infrared sensor above the seventh preset button responds to commands from the supplied remote control, which duplicates most of the front-panel functions.
At approximately the center of the panel is a display area that shows signal strength of a received station (graded from 1 to 5), the selected AM or FM frequency, stereo reception, and the status of the fine-tuning feature. The "Hi Q" button is just below the display area; pushing it activates the narrow-mode circuitry described above as well as the fine-tuning circuitry, controllable by means of a small rotary knob next to the "Hi Q" button. When you use the fine-tune knob, an arrow in the display shows if you have tuned above or below the frequency indicated by the numeric display. If you tune to another station, the Twenty-Three automatically cancels the fine-tune setting, since the new station might not require fine tuning. (Even if it did, the fine-tuning direction required for one station would not necessarily be optimal for another.) Farther to the right are an interstation "Mute" button, AM and FM band selector pushbuttons, a mono/stereo button, a "Seek" button, and a large tuning knob. When "Seek" is pressed, rotating the knob in either direction causes the tuning circuits to scan across the band and stop at the next strong signal. When "Seek" is released, the knob tunes linearly, with displayed frequencies changing gradually as you turn it.
The rear panel of the Citation Twenty-Three is equipped with 300- and 75-ohm FM antenna terminals, AM antenna terminals (to which the supplied pivoting AM loop can be attached), variable and fixed output jacks, and an unswitched a.c. convenience outlet. A control near the vari able output jacks is used when adjusting output level, and a second small control adjusts muting threshold (the level of signal that will overcome the interstation muting circuit if muting has been activated at the front panel).
My zip code is 33614 for shipping est. no extra charges for shipping supplies buyer pays shipping only. I do take pride in packaging and I will pack with great care at no extra charge, poly bags, edge protector, bubble wrap, shrink warp, styrofoam and double boxes etc. Like to use UPS, FedEx. I prefer paypal, cashier ck, payment within 3 days after sale. Thank you for Looking, Chris
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