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Don's List Lab
This page is intended as a place to put simple lists of tuners that have one particular feature or another. We'll need input from readers to make the lists as comprehensive as possible. Please post additions to existing lists, or suggestions for new lists, in our FMtuners group. Tuners don't have to have TIC writeups in order to be listed here. We've renamed the page in honor of our contributor Don W., the most prolific creator of list topics.
MPX Decoder ICs
Don writes, "I have always wanted to see a list of tuners which have certain MPX decoder ICs. The 'big 3' I would like to see are the LA3450 and LM4500 (because of their unique decode waveforms), and the HA11223 (near universal praise as capable of excellent sound). I have compiled my own list, but I can't be sure it's completely correct. There was a discussion of this topic in FMtuners." If you can give us a hand and help us improve this list, let us know.
Tuners with Sanyo LA3450:
Tuners with National LM4500:
Magnum Dynalab FT-11 (some versions)
Magnum Dynalab FT-101A (some versions)
McIntosh MR 80
*Our contributor Esmond says the Quad FM4 uses the Philips TCA4500, which appears to be identical to the LM4500. He believes that later Quad tuners also use it.
Our contributor Paul Baptista says the Arcam Delta 80 and Telefunken RT200 (whatever those are) use the TCA4500A, the Motorola and Siemens part number for the LM4500A.
Tuners with Hitachi HA11223 or HA11223W:
Kenwood KT-9X and KT-9XG
Kenwood KT-1000 (has chip, but discreet implementation?)
Kenwood L-07T (we have a discrepancy - HA11223 or HA1156?)
NEC/Curtis Mathes AUT-8300E
Nikko Gamma I
Nikko Gamma V
Tuners with Hitachi HA12031:
Our panelists JohnC and Ray made additions to the above lists and also offer these:
Tuners with Hitachi HA1196:
Sanyo Plus T55
Tuners with Hitachi HA1156:
Kenwood L-07T (we have a discrepancy - HA1156 or HA11223?)
Tuners with PC1161C:
Tuners with Sanyo LA3350:
Fisher FM-2310 Studio Standard
Kenwood Basic T1
Tuners with Sanyo LA3401:
AMC T7 and T7A
Harman/Kardon Citation 23
Tuners with Sanyo LA3410:
Tuners with uPC1223:
Tuners with Pioneer PA1001-A:
Paul Baptista tells us that this chip was also known as the Toko KB4437. Here's Paul's list:
Harman/Kardon 680i receiver
Mitsubishi DA-R20 receiver
Pioneer SX-1080 receiver
Pioneer SX-1280 receiver
PLL tuners with oscilloscope outputs
Our contributor Peter provides the start of this Eurocentric list, which obviously needs to be more fully populated:
ASC AS3100 - 1980 or 1981
Crown FM1 - 1979
Kenwood KT-1100SD - 1985
Kenwood KT-3300D - 1987
Kenwood L-1000T - 1991
Kucke KST22 - 1980 or 1981 (same as ASC AS3100)
Nikko Gamma V - 1978
Onkyo T-909 - 1979
Onkyo T-9900 (T-9090) - 1984
Onkyo T-9990 (T-9090II) - 1988
Optonica ST-9100 - 1980
Revox B760 - 1977
Scott 433 - 1970
Scott T33S - 1972
Technics ST-9038 - 1979
Tuners with remote controls
Don's back with the start of another list. We've made some additions but there are surely many more.
Harman/Kardon Citation 23
Mission Cyrus T (second generation)
Tandberg TPT 4031
Technics ST-G90 (some versions)
Tuners with three or more IF bandwidths
Here's another good list suggestion from Don. The benefits of having wide and narrow IF bandwidths in a tuner are fairly basic: wider filters tend to produce the best audio quality, while narrower filters improve rejection of adjacent-channel interference. Three bandwidth settings, with intelligently chosen filters, can provide even greater flexibility for audiophiles and DXers alike. Only the T-85, to our knowledge, has four IF bandwidths.
McIntosh MR 78
Onkyo Grand Integra T-G10
Onkyo T-9090 and T-9090II
Tandberg 3001 and 3001A
Tuners that have MPX implemented using discrete transistors (solid state) instead of an integrated circuit
Thanks to our contributor Paul for the idea. There should be other tuners in this list, but here are a few to start with:
Kenwood KT-7000 and KT-7001
Kenwood KT-8005 and KT-8007
Tandberg 3001 and 3001A
Yamaha T-70 and T-80(?)
Don notes: "Here's the tricky part: Some tuner designs have a MPX chip that
is used to generate a 38 kHz clock locked to the 19 kHz pilot tone. The actual MPX decoding is then done by external circuitry. (At least that is my understanding.) My impression is that the T-70 falls into this category. Bob says: 'The KT-8007 uses an outboard MPX switching scheme very similar to the KT-8300. If working correctly, you should see 38 kHz square waves coming out of pins 4 and 5 when a 19 kHz pilot is present on the input.' I take this to mean that both these Kenwoods do the MPX decoding in discrete circuitry outside of the MPX chip."
Our panelist Bob confirms: "That's right, you can have:
1) Fully discrete, no chips - older tube and solid-state tuners, mostly
designed before 1975
2) Hybrid - MPX chip with outboard switching
3) Dedicated single MPX chip does all decoding - most solid-state tuners
4) MPX decoding using multiple chips and or discrete components together in an advanced modern design, in many (but not all) cases using pure sine wave decoding
In category 2 are many high-end tuners, including the KT-8007, KT-8300, 600T, TU-9900, T-70, and I think the Yamaha T-80 also. In category 4 you have the Yamaha T-85 and TX-1000/2000, Rotel RHT-10, most high-end digital Pioneers like the F-9, F-90 and F-99X, the Sansui TU-D99X, and most top-model digital Kenwoods."
Tuners with FM deviation meters
Here's a new list idea from our contributor Eli. We've just started this one so please post in our FMtuners group if you have any additions to the list.