- KENWOOD STEREO CONTROL AMPLIFIER KC 208 SPECS MOD
- KENWOOD STEREO CONTROL AMPLIFIER KC 208 SPECS FULL
- KENWOOD STEREO CONTROL AMPLIFIER KC 208 SPECS MODS
To get the full benefit of the 600T, you have to use the fixed output, which avoids an extra output buffer stage. I still haven't done as much antenna experimentation as I'd like, but I'm beginning to like the 600T's sound so much I haven't put the MR 78 back. The strength meters on most tuners are useless, except perhaps for tuning. It's almost worth owning this tuner (or sibling KT-917) just for the useful strength meter. The 600T has a marvelous signal strength meter calibrated in 10 dB increments. Our contributor Charles has a 600T story: "In my kitchen, I took the McIntosh MR 78 down and put up the 600T so I could adjust my antenna better. On the back panel are fixed and variable RCA outputs, jacks for an oscilloscope and an AC convenience outlet. In addition to the IF bandwidth switch, the 600T's front-panel features include a button to switch the combination multipath/deviation meter, FM MPX filter switch, variable output knob, two levels of muting (or muting off), de-emphasis normal/25 µS and dimmer on/off. The 600T's front panel resembles the KT-917's, leading some people to assume erroneously that the differences between the tuners are merely cosmetic, but the 600T is somewhat smaller and has very different circuitry inside.
KENWOOD STEREO CONTROL AMPLIFIER KC 208 SPECS MODS
See the DIY Mods page for information on adjusting the filters in the 600T.
KENWOOD STEREO CONTROL AMPLIFIER KC 208 SPECS MOD
The catch there is that it uses the old-style 4-pin filters in narrow mode, rather than the 3-pin type currently available, so the filter mod is not a straight swap. Most examples of the 600T can be expected to have excellent sound, in part because of the wide bandwidth, but will probably disappoint a DXer unless some of its filters are replaced with narrow ones. The 600T is among the most sensitive tuners but in stock form its adjacent channel selectivity is not as good as one might expect. Wide mode uses linear phase LC filters, while narrow mode uses a 12-element ceramic filter section (three 4-pin filters with 4 elements, or stages, each). It has an 8-gang variable capacitor (it appears to have 9 gangs but 2 of the gangs are tied together - it uses a 2-gang variable capacitor for a local oscillator, unlike conventional local oscillators which use a single type variable capacitor), and uses 2 parallel IF filter paths (wide/normal and narrow). The FM-only 600T was Kenwood's first tuner to use their pulse count detector circuitry, which was designed to reduce noise, and the 600T is a very quiet tuner.
Kenwood 600T (1976, $650, front, back, Euro back, inside 1, inside 2,īack with amp, brochure, ad, block diagram, schematic 1, 2, 3, 4, detailed specs, detector/MPX scheme: pulse count detector, charge injection cancellation discrete MPX switches, MPX PLL generated 38k with HA1156 chip) Note that the number of gangs can get to as high as nine with a single RF stage, so it is not an issue of lower cost by going to a single RF stage." The same can be said of the Sansui TU-9900 and TU-X1 and the Yamaha CT-7000, which have two RF stages while those companies' later designs do not. The Kenwood 600T and 650T, KT-7000, L-07T and L-07TII have two RF stages. Double- and triple-tuning also costs sensitivity since these have bigger losses than a single-tuned circuit. The KT-3300D, L-02T and L-1000T have passive mixers for improved IP3 rejection, at the cost of sensitivity. The KT-9XG, KT-1000 and KT-3300D, like the Pioneer F-91 and F-99X, Sansui TX-701 and Yamaha T-70, are only single-tuned at the antenna and are double-tuned after the single RF stage. The L-02T is double-tuned at the antenna and quad-tuned after the RF. The L-1000T lets you bypass the single RF stage, as do the Onkyo T-9090 and Rotel RT-990BX (which is the same as the RHT10). Here's David with some further technical information on Kenwood and other tuners: "The KT-1000 has one RF stage, as do the KT-3300D, L-02T and L-1000T. More thanks to David Rich for his summaries of detector and MPX circuits for many Kenwood tuners. Our Kenwood brochures page has images, information and specs for many Kenwood tuners and other components as well. In parentheses after the model number are the year of introduction and most recent list price, and/or the original list price if indicated by "orig" (special thanks to David Rich of The Audio Critic for copies of historical material from his reference library). Tuners are listed in alphabetical and numerical sequence by model number. Granted to quote our text so long as proper credit is given.ĮBay listings that quote us incorrectly or without credit may be