Lafayette Kt 600 Manual: How to Use the Stereo Master Control Center from 1959

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Lafayette Kt 600 Manual

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This is an older, two-piece tuner. The tuner is the Naim NAT 01. The power supply/controller, called the Naim NA PST, supplies power to a separate AM tuner and Aux something? It also takes the signals from these same three and sends one to a proper preamp via switching controls on the front. The tuner can also bypass this switching and go direct to your preamp, which is how I listened. It's a pleasant-sounding tuner with no real sonic irritations. The bass wasn't as deep or full as the L-02T's. The midrange was more one-dimensional and had a diffuse sound to it. The soundstage was taller than the L-02T and more laidback (meaning more to the rear of the speakers). The highs, as said, were non-fatiguing. There are NO controls on this model: no wide/narrow, no mute defeat, no manual blend, no mono, nothing! And it drifts off channel from time to time. It tries so hard not to offend and for that reason it did. Sonically? Livable. Ergonomics? I'll pass. Winner, the L-02T. Rankings after Shootout #18

This time around we have a very attractive Pioneer. The TX-9500II gave a clean sonic presentation. A/B testing against the L-02T, the soundstage is taller but narrower. Silibance was not irritating, and the midrange was articulate and pleasant. Imaging was good but lacked the sense of depth of the L-02T. Where the TX-9500II stumbled was in the lower midrange and bass area. The L-02T consistently gave more body to the music and a sense of power in the bass. I'm actually impressed with the TX-9500II's sound. The audio amp is a multi-function 16-leg PA1002. Pioneer says, "This AF amplifier is a direct coupled amplifier used as a differential NFB amplifier providing outstanding dynamic range, S/N ratio, and distortion factor." This chip also holds de-emphasis and muting functions. A quick look at the service manual invites some possible DIY improvements. The audio path is the same as a TX-8500II, which I've rebuilt with Black Gates and Nichicons, replacing the old electrolytics and tantalums. The final sound of the 8500II gave a more fleshed-out midrange and an even sweeter treble.

I've had a love/hate relationship with this tuner for many years and have owned 3 or 4 of them. I accentuate this review with the fact that every one I've tried had very poor reception. Although it is a good-sounding tuner, it is not sensitive at all and won't pick up anything but the strongest of stations. The one now under review is no better: it couldn't see 88.1, a station no other tuner has had trouble with, it had trouble with 88.9, and you can forget about 88.7. On the strongest stations, the sound was good, with good bass through the highs. The sound was more diffuse than the L-02T, which has great imaging. I've bought a TU-600 service manual so if I get it serviced and things improve, I'll post the results. Eric also had problems with the adjustments on his TU-800, which Bob now owns (read TIC's Denon TU-800 writeup). I'm hoping this MAY be an assembly line problem and not a design problem. Not recommended - lowest overall rating so far. Rankings after Shootout #36

The ST-J88B is one of those tuners I would love to see (hear) aligned right with new filters selected the way we've learned they should be. I like the sound and wonder just how far it could be pushed. The outside is very attractive, which is something I find hard to get right on a digital tuner. It is wide, low and has an pleasant, understated display. The grey/silver face is a nice change from the black or silver "me too" look of so many tuners. I guess when you've had hundreds of different tuners sitting on the shelf, the sameness in colors can get tiresome. When I saw it at my friend's office, I couldn't wait to snatch it up and take it home for a test drive. I usually don't do this but had to take a look under the hood. It appears to have a user-friendly DIY-type layout that's fairly easy to understand, even without a service manual. There seems to be two 4560 op-amps along the audio path with capacitors that should be easy to upgrade, also. Time to order some parts.

Most of my serious listening judgments are formed while tuned into local stations with strong signals. It was interesting to see how aggressive the T-9090II was in deciding when to activate the narrow modes, hi-blend, etc., to protect me from any type of noise. Along with this automatic protection, the soundstage, imaging and "life" to the music were dulled, if not lost. When manually switching to wide mode and turning off the blend circuit on stations with fair signal strength, I was able to recapture the music with little or no noise. The auto controls were first noticed when tuning to 88.1, college jazz. I sat down and was surprised how dull the sound had become compared to the L-02T. Manual switching brought it back to life and with a clean background.

On to 88.7, KTCU, to the west. Both tuners liked the signal on this day but only in narrow. The Kenwood shut to mono while the Onkyo held onto stereo but with more noise. When manually switched to mono, both tuners shared the same good signal characteristics. I turned the antenna to the east in hopes of capturing 88.7 in East Texas but there was no tropospheric help in the winds this day. What I did notice was the T-9090II's ability to track 88.7 in the west. In the past, the L-02T usually ruled here and it was able to pick up the signal, but never as clean or over as much antenna rotation as the 9090II. Turning to our other problem test signal, 88.9, KETR, which is 50 miles away, we find the Onkyo was able to hold a slightly cleaner stereo signal. This station was most enjoyable when switched to mono in either tuner. I'll shorten this review and finish with some observations at the other end of the dial. Again I found the auto circuits in the 9090II to be overactive at 104.9, which is 45 miles away, and 106.7 at 56 miles away. When I manually switched to wide mode, both these stations came in loud and clear. I did notice, I was able to pick up a weak Spanish language station, 107.1, west, at 70 miles away but couldn't capture another at 107.1 only 32 miles east. It must be all those trees my antenna looks into, toward the east. The T-9090II proved to be as sensitive as a 12-year-old jumping into puberty and, as such, needs a little direction and control for me to live with. And just like any teenager, be careful which buttons you push! Winner in sound? The L-02T. Winner in DX? The T-9090II. Well, that tears it - I need to get this Kenwood aligned! Rankings after Shootout #42

DX tests started at 88.7, KTCU, with both tuners in narrow. Here both tuners had good to fair signals but when switched to wide, the TX-11b lost the battle. Swinging the antenna to the east proved the L-02T capable of capturing KTCU's signal from the west but the TX-11b chose to jump ship and swim to 88.5's stronger signal, almost drowning in a sea of noise instead. Our other weak neighbor, 88.9, was a more friendly port in the storm as both tuners were able to capture and hold their signals under the cloudy and rainy conditions of the day. I must close this review with a tour of AM stereo, a rickety lifeboat, IMO. This is the first time I remember listening to AM stereo. The Carver manual says to keep AM de-emphasis switched on and, after listening to it both ways, I agree. It was interesting and strange to listen to AM in stereo. While interesting, it still sounds like AM, well, better AM or maybe really bad FM. I found two stereo stations, 770 KAAM which played many songs so old they were obviously "electronically reprocessed for stereo" (remember those?) and 620 KMKI, Disney radio. The winner for everything but AM Stereo? The L-02T. Rankings after Shootout #46

Ha! Accuse me of favoritism, will you? Another Kenwood has clawed its way close to the top. The sound was quite nice but I wasn't crazy about the controls being on a remote. It did have lots of gadgets, though, some of which were wide/normal/narrow bandwidths, high/low sensitivity, and two antenna inputs. The face is clean with a muted amber (yellow) display. The remote volume came in handy to level match the two tuners. As many know, I use an alps pot to level-match tuners and it involves lots of adjusting back and forth from couch to controls, so the remote made the process somewhat simpler for this review. One interesting feature was that the tuner automatically chooses wide, normal or narrow mode when changing stations or when using the rotor to pull in a station. You can manually override this, but I'm not sure I like this "I know what's best" mentality. Some people must have their gadgets.

On 88.7, the L-1000T automatically switched to narrow mode. When placed in wide mode, neither tuner could capture the signal. A lot of this has to do with atmospheric conditions and possibly, the station, as I've been able to receive a fair signal from the L-02T in wide on other occasions, in other reviews. In narrow mode, the L-1000T was the noisier of the two. I was a little surprised that it was able to control 88.5 interference better than most tuners have in the past. At 88.1, both tuners played fine and I stopped awhile to enjoy the jazz. At 88.9, the L-02T usually goes into mono in auto mode but will play stereo when manually switched. While both tuners held stereo signals, the L-1000T was slightly quieter and cleaner-sounding. Neither one was a clear winner in controlling 107.5's problematic background birdies and grunge. 2ff7e9595c