I am not fer sure, but the tuner is based on one of these:
(
http://www.geocities.com/tunerinfo)
Mitsubishi DA-F10 ($300, photo) - The FM/AM DA-F10 has a 4-gang FM front end with a dual gate FET RF amp. Our panelist Bob says that the DA-F10 “is not just like a DA-F20 with meters - it's totally different inside, like the difference between a Sansui TU-717 and TU-919.” Our contributor Bill reports: “At first glance the DA-F10 appears to have two IF strips - there is one IF strip that drives the H&V multipath scope outputs and the second is for the RF path. In Wide IF mode it uses a 6-pole linear phase filter block, while in Narrow mode there are 2 standard 230 kHz filters switched in before the 6-pole filter. The DA-F10 sounds great, and even in Wide mode is fairly selective. This unit is very easy to get to the circuit board to do mods. I changed out the two 3-pin 230 kHz filters with new 150 kHz Muratas, and with the narrower filters this tuner is now within shooting distance of what the Carver TX-11a (stock) can do.” Unfortunately, the DA-F10 has an overactive crystal lock like the Sansui TU-919, and a combined stereo/mono and muting on/off switch that prevents one from choosing to listen to weak signals in stereo (muting can be defeated only by switching to mono). Four DA-F10s sold for $44-104 on eBay in 3-7/02.
Mitsubishi DA-F20 (198_, $430, photo) - The DA-F20 is an unusual-looking FM-only tuner whose front panel resembles an automobile dashboard. It has a 5-gang traditional tuning capacitor front end, and crystal referenced tuning with digital LED readout. It also has a discrete output stage and decent ergonomics. The DA-F20 has two wholly independent IF paths, each with its own detector, with linear phase LC filters in the wide path and standard 3-pin ceramic filters in the narrow path. Wide/narrow switching is done by a front panel switch that selects which detector output feeds the stereo MPX circuit. Our panelist Bob was able to easily mod the narrow filter path and install better filters in place of the original Toko filters, which were out of spec. After he replaced the narrow filters, it was necessary to retune the narrow detector. This, along with tweaking the RF front end, brought the tuner to fantastic working condition. Bob reports: “The DA-F20 is one of my top tuners. I like the tight bottom end and clean reproduction of brass and strings, and it's one of my most sensitive and quiet units in stereo mode with no blend or MPX filter applied.” Until recently the DA-F20 sold for $80-125 on eBay, but the current price range appears to be $110-180 in 3-7/02.
Mitsubishi DA-F30 ($400, photo) - Honorable mention. More information will be forthcoming. Six DA-F30s
:lmao:
