昨天,从网上查到了关于收音头的排行榜,内有机器的性能简介、二手价格以及生产年代,有一定参考性,现转摘如下,供同好们参考。
TOP OF THE LINE (十台顶级机子)
Kenwood 600T and 650T(late 1970\'s)
- predecessor of the KT-917
- used can cost $500+
- 8 gang front end
- 12 element IF (3 4-pin 4-staged filters), so difficult to modify since 3 pin ceramics not used
- double balanced mixer minimizes harmonics and spurs
- 650T said to be identical to the 600T, but w/ a bronze face. Rare!
Kenwood KT-917(1980-1982)
- list price new was $1100; used can still cost $500-$750
- 9 gang front end
- excellent signal/noise ratio
- double balanced mixer minimizes harmonics and spurs
- 3 IF settings; deviation/multipath meter along
- difficult to modify IF section, as it uses 4 pin filters, not \"traditional\" 3 pin ones
- read a more detailed review
Kenwood KT-8300 (and KT-9900) (late 1970\'s)
- 6 gang tuner, it rates well w/ the KT-815 and KT-7500
- 5 IF filters, but difficult to modify the IF due to 4 pin filters
- sells for $175 - $250 used
- KT-9900 said to be a bronze-faced European version of the KT-8300; one KT-9900 seen on eBay 5/2002
Sansui TU-X1 (1980)
- rated \"better than the TX-9800 but worse than the KT-917\" by one user
- sold for ~$1000 new, can be found for $750+, though rare and sometimes for more money
- was meant to compete with the KT-917
- heavy (40 lbs)
Yamaha T-85 (digital model from 1986-1989)
- 9 gang front end, so overload resistant
- 5 (or more?) IF filters
- recommended by several DX\'ers due to it\'s overload rejection capability
- digital tuner, has fine tuning in .01 MHz steps
- see some of the T-85\'s specs
EXCELLENT (十台优秀级型号)
Kenwood KT-1100 (non-USA overseas, 1984) thanks to Peter Körner for the info
- 5 gangs on FM, 3 gangs for AM
- 4 IF filters (2 in \"wide\", all 4 in \"narrow\" mode) appear easy to modify
- Peter ranked this tuner equal to the KT-917 in some respects, but noted some treble \"smearing\" when compared to the KT-917
- Peter also ranked this tuner better than the KT-1100SD in most measurements
- Read more about the KT-1100
Kenwood KT-1100SD (around 1985) thanks to Peter Körner for the info below
- was not sold in the USA (only overseas)
- 5 gang varicap quartz synthesizer, tunes in 50 kHz steps
- 4 different IF selectable selectivities
- 5 ceramic IF filters all 180kHz, easily modifiable.
- muting while tuning can be disabled, and \"flywheel\" tuning can be achieved with a mod.
Kenwood KT-7500
- 5 gangs, 5 IF filters
- $80-$120 on eBay unmodified
Kenwood KT-8005 (~1973) thanks to Peter Körner for the info
- 5 gang tuning capacitor
- two (or 4??) metal cased dual (four staged) IF filters (traditional ceramic filters are 2 staged)
Kenwood KT-815 and KT-8155 (circa ~1980)
- 5 gang front end
- 4 IF filters - standard 3 pin IF section, so easier to modify
- I recommend it - it outperforms my Onkyo T-9090II in most aspects
- remove 300W balun on circuit board in rear near the 300W antenna jack to get an extra 2 dB of sensitivity
- generally $150 or less used; KT-8155 was a black faced version, perhaps only sold overseas?
MITSUBISHI DA-F20 (early 1980\'s)
- $60-$130 used
- one long-time TX-9500 user reported this tuner is now his primary tuner due to it\'s better sensitivity
- Digital readout, presumed to be from around 1981 or 1982
- Wide/narrow IF settings with separate IF paths
Onkyo T-4711(1990\'s)
- Digital tuner offered in black (standard) and goldish-silver face; tunes in 25 KHz steps
- Has a tuning knob, rare for a digital tuner and nice to use; 40 presets; remote-control required for switching between A and B antenna
- RDS capability - very handy for DX\'ers
- 6 IF filters (wide/narrow option)
- the circuit board is nicely laid out and easy to read
- IF mods are more difficult than most (back panel must be removed, and lots of plastic locks and a few screws on the board itself)
- my T-4711 is slightly more sensitive than my T-9090II
- more presets, RDS, better sensitivity, and the tuning knob make the T-4711 much prefered over my T-9090II.
- seen on eBay ranging from $200 - $350
- view Onkyo\'s overview of this tuner
Onkyo T-9090II(1988-1991) and T-9090 (1984-1988)
- digital tuning in small increments (.025), 20 presets
- Good out-of-the-box performance w/o IF mods (comes by default with multiple 150KHz filters in super-narrow mode); IF easy to modify further
- separate IF paths for wide and super narrow modes
- $250-$500 used
- Note that the T-9090 is almost identical, but larger .2 MHz tuning steps, only 1 antenna input, and only 2 IF modes
- View Todd Emslie\'s review
Pioneer F-28
- 5 gangs, 4 IF filters w/ wide/narrow option
- very little DX\'er input at this point - might be a better performer than this
Pioneer TX-9100 (1973-1975)
- 5 gangs and 4 filters
- $100-$200 range common
- well liked, good specs, and a decent AM section
- difficult to IF modify due to board layout
Pioneer TX-9500(and TX-9500II) (1976-1979)
- similar recommendations as the TX-9800; 9500 is more common on eBay, sells for $100-$175.
- 9500 is easily modified; one user said it was difficult to modify but it\'s unclear as to if it\'s certain production runs, the 9500II, or just the opinion of that one DX\'er. :)
- 5 gangs, 9500 has 4 filters, 9500II has 5 filters and a unique filter (used in wide mode??)
Pioneer TX-9800 (1979-1981)
- recommended my numerous DX\'ers; 5 gangs and 5 IF filters
- IF modifications are fairly easy, though a few filters are situated next to a metal support bar, making for difficult access
- my TX-9800 has slightly worse image rejection than the KT-815, but I\'ve yet to tune-up the front-end
- fairly \"common\", nice used units range from $200-$300; modified units can cost more; units with minor cosmetic problems, burned out lights, etc, can be found for $125-$200.
Sansui TU-919 (1979-1981)
- has both a digital readout and analog dial
- 5 gang front-end
- very frequently available on eBay - despite this prices have ranged from $250 to an extremely overpriced $600
Sansui TU-719 (late 1970\'s)
- 4 IF filters, 4 gang front end
- similar to the TU-717, but one DX\'er rated it better out of the box than the 717
Sansui TU-9900 (mid 1970\'s)
- 5 gangs; wide/narrow IF switch
- doesn\'t use traditional 3 pin ceramic IF filters, so difficult to enhance selectivity
- units in very good condition can sell for $300-$550
Technics ST-9030 (1978)
- FM-only tuner with an 8 gang front end and 5 IF filters
- easy to IF modify
- has phenominal image rejection
- very nice to operate, very smooth tuning and a large analog display
- more sensitive than my T-9090II and almost as selective post modification; slightly less sensitive than my KT-815, but an alignment made it very close
- sells for $150-$200 stock, $300+ when modified
Yamaha TX-1000 and TX-1000/U
- Digital tuner, seen on eBay for $225-$325; sold for $550-$600 new
- Not much DX\'er input, but has specs comparable to the T-85
- More info to come...
VERY GOOD (十台较好级型号)
Carver TX-11 (and TX-11a and TX-11b)
- FM only TX-11 began production in 1985; TX-11b sold in the 1990\'s - widely used in DX circles
- Easy to modify IF section
- Sold for $485 new, will cost $200+ used
- View specs here
Denon TU-767
- 1985 digital model
- tunes in .1 MHz increments
- has a solid audiophile reputation, so might be a good choice for audiophile-DX\'ers
Denon TU-800 (1988)
- 8 IF filters (wide/narrow/super narrow)
- one DX\'er commented \"the most sensitive tuner he\'s ever seen\"; but did have some overload
- 30 presets, .1 MHz tuning steps might be a tad large for some DX\'ers
- DX\'ers may also be frustrated by it\'s automatically returning signals to stereo when a certain signal threshold is reached
Kenwood KT-7300
- reports were that this model was highly variable in performance, but generally very good. Check out the KT-7500 for a more reliable performer
- 4 gangs, 3 IF filters
- A nice KT-7300 sold for $76.50 in April 2002 on eBay
Pioneer TX-7800 (1979)
- 4 gangs, 3 IF filters
- some variance in performance noted - some rate it along side the KT-7300, and others better than the KT-7300 and KT-7500
- great bargain DX tuner once IF modified; found for under $100 and fairly common
Realistic TM-1001(1979)
- 4 gangs, 4 filters
- winde/narrow switch, high blend switch
- not much DX\'er input on this tuner, but is a good deal for the money (less than $75)
- see the specs
Sansui TU-717 (1977-1979)
- 4 gang front-end, 4 IF filters
- VERY common on eBay - about 20 appeared on eBay in April and May; runs about $140-$230 used
- good, easy to IF modify, but doesn\'t rate w/ the top of the line Sansui\'s, Kenwoods and Pioneers
Yamaha T-80
- 4 IF Filters, and easy to modify
- WTFDA\'er Steve Solomon notes \"95% the sensitivity of the T-85\"
- digital tuner w/ separate fine tuning (in .01 MHz steps)