Onkyo T-4700 Synthesized AM/FM Stereo Tuner (1990) RARE (Just the Tuner)
- Condition: Used
- Price: 262.18 EUR
- Status: sold
- Item number: 305620511288
- Seller: listentoyourworld (1317|100.0%)
- Seller information: non commercial
- Item location: Island Lake, Illinois
- Ships to: US
- Shipping: 45,0 EUR
- on EBAY
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Description
Dropped $50 06/22USMC Veteran selling only quality products. Please see my feed back. The T-4700, a black digital FM-AM tuner and the scarcer big brother of the T-4500, is another superb DXing tuner from Onkyo. It has a very complicated front end, as our panelist Bob explains: From the schematic, you can see there are two gangs before the metal can, which are switched in or out of the circuit with diodes, controlled by a local/DX switch. The local setting would add the two gangs. Then, there are another two gangs, an RF amp, another two gangs, then a mixer. There is one gang used in the oscillator. This totals 5 gangs in DX mode, 7 in Local mode. Recall that an RF gang, besides being a bandpass filter, has loss. The extra two gangs would be like inserting a tuned attenuator in front of a normal 5-gang tuner. The 4 tuned gangs before the RF amp would seem to be a really decent design to prevent front end overload in areas with big local transmitters. Ive never seen that design before (normally there are one or two gangs before the RF amp), but it makes sense.The T-4700 has 6 ceramic filters: X101 and X105 are Murata SFE10.7MX, believed to have a 250 kHz bandwidth; X102 and X104 are SFE10.7MZ2K-A, 150 kHz bandwidth GDT type; and X103 and X106 are SFE10.7MJK-A, 150 kHz bandwidth non-GDT. The 150 kHz filters are switched in for the Narrow IF bandwidth mode. The T-4700 tunes in either .5 MHz or .25 MHz steps Jims description of the T-4500s features applies as well to the T-4700, which also has a front-panel output level knob, dual antenna jacks, adjustable muting level, and the ability to input names for stations - in fact, Jim would be pleased to count 44 buttons and one knob on the T-4700s front panel. Despite their similar exteriors, the T-4700 is quite different from the T-4500 inside, with a much larger and more sophisticated circuit board. With a couple of matched 110 kHz filters installed, the T-4700 would probably be a world-beater for DXing, on par with a T-9090 or T-9090II. The T-4700 and T-4500 are more intelligently designed than the T-9090s, however, with their 40 presets and related buttons grouped together to allow the APR function buttons to be laid out more logically.The T-4670, sold throughout Europe except for the UK, is believed to be substantially identical to the T-4700 except for voltage and tuning increments. The T-4700 is rarely seen on eBayOnkyo T-4700 Synthesized AM/FM Stereo Tuner (1990) SpecificationsType: Mono/Stereo TunerTuning Bands: FM, MWTuning Scale: DigitalFM Tuning Range: 87.5 to 108 MHzMW Tuning Range: 530 to 1710 kHzSensitivity: 0.9uV (FM), 25uV (MW)Signal to Noise Ratio: 77dB (FM), 40dB (MW)Distortion: 0.07% (FM), 0.7% (MW)Selectivity: 60dB (FM)Frequency response: 30Hz to 15kHz (FM)Output: 1000mV (FM), 300mV (MW)Dimensions: 435 x 92 x 366mmWeight: 5.2kg
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