You are Buying a Vintage High Quality Micro AIWA Quartz Digital Synthesizer R50 AM/FM Stereo Tuner ST-R50 - Japan -
DESCRIPTION:
You won't find a tuning knob on the ST-R50, because there's no more tuning capacitor to be rotated. All tuning is performed automatically and electronically by means of an voltage-sensitive varactor diode that employs a PLL quartz synthesizer for extra accuracy. Up to 10 MW, FM and LW stations may be programmed at random into the memory circuit and recalled instantly at the touch of a button. Manual tuning is also possible by holding in the up or down control until the desired station frequency is displayed. For optimum sound quality, a quadrature detector circuit with 6-element ceramic filters having flat group delay characteristics achieves a high sensitivity.
A newly developed IC in the limiter and detector reliability. A PLL IC in the MPX demodulation stage provides stable FM stereo switching unaffected by temperature, humidity or aging. The ST-R50 can also be combined with a couple of Aiwa optionals that make it perhaps the most convenient all-around versatile tuner available. When connected to the optional MT-50 timer unit, two On/Off cycles can be programmed at any time desired, and if the power remains on, preset stations may be changed automatically up to 6 times in a 24 hour period. The RC-R300 wireless remote transmitter/receiver unit (also optional) is capable of performing manual Up/Down tuning or selection of preset stations from up to six meters (20 feet ) away.
FEATURES:
Adjustable synthesizer sensitivity control
3 or 4 digit tuned frequency display
FM muting and Hi-blend switches
5-point LED signal strength indicator
SPECIFICATIONS:
FM Section
Frequency Range: 87,5 - 108 MHz
Usable Sensitivity: 1,9 µV (10,8 dBf)
50 dB Quieting Sensitivity:
Mono: 4,5 µV (18,2 dBf)
Stereo: 45 µV (38,2 dBf)
Capture Ratio: 1,5 dB
Selectivity: 35 dB (±300 kHz); 65 dB (±400 kHz)
Signal-to-Noise Ratio
Mono : 75 dB
Stereo : 72 dB
Image Rejection Ratio: 80 dB
IF Rejection Ratio: 80 dB
Spurious Rejection Ratio: 90 dB
AM Suppression Ratio: 55 dB
Total Harmonic Distortion
Mono : 0,1% (1 kHz)
Stereo: 0,2% (1 kHz)
Frequency Response: 30 Hz - 15,000 Hz (+0,5 -1,5 dB)
Stereo Separation: 45 dB (1 kHz)
AM Section
Frequency Range:
MW: 525 kHz - 1605 kHz
LW:150 kHz - 285 kHz
Usable Sensitivity
Bar Antenna:
MW: 250 µV/m
LW : 700 µV/m
External Antenna:
MW: 30 µV
LW: 70 µV/m
Selectivity: 30 dB
Signal-to-Noise Ratio: 50 dB
Image Rejection Ratio:
MW: 45 dB (1,000 kHz)
LW: 40 dB (250 kHz)
IF Rejection Ratio: 35 dB
MW: 1,000 kHz
LW: 250 kHz
Power Source: 240 V 50/60 Hz
Dimensions (W x H x D): 250 x 71 x 280 mm (9-7/8" x 2-13/16" x 11-1/16")
Weight: 2,4 kg (5,3 lbs)
I strive for 5 stars. If you feel something has fallen short of that, please contact me before leaving feedback. I buy on eBay also and try to make your buying experience one that I would expect if I was on the other end of the transaction.
SHIPPING: Will be with Canada Post Expedited Parcel or with UPS Expedited United States in the lower 48 U.S. states. International, Alaska, Hawaii and Puerto Rico residents, exact shipping will be determined once the auction is ended and item(s) are actually weighed. Buyer is responsible for duties, taxes & any fees within their Country’s Customs. Tracking information will be added to auction listing once your purchase is shipped. Most foreign shipments are sent via Canada Post Expedited Parcel unless buyer advises otherwise. Please ask for a shipping quote before bidding and/or purchasing.
COMBINE SHIPPING: If multiple auctions are won, items will be combined whenever possible, to save you money on shipping expenses. Note:some items can’t be combined. Please let me know if you are waiting on another auction to complete so I don’t assume you are a slow payer. PLEASE WAIT for a combine invoice before sending payment. Once payment is made, the auction(s) is considered closed. Other auction(s) won won’t be combined for shipping.
RETURNS: If for some reason an item(s) must be returned, shipping charges are non-refundable. If an item is received in error, or has a problem and is my fault (not the manufacturer) shipping cost will be reimbursed. If an item received is not what the buyer wanted or purchased by mistake, shipping charges both ways are not refundable. Most electronics are also non-returnable since I would have no idea if they have been misused. If an item(s) is damaged due to shipping, we will contact the shipper and refund the purchase price but would need pictures of the item(s) and box damage. Again, shipping charges are non-refundable.
PAYMENT: Must be received within 7 days of the end of the auction. If payment is not received within 7 days of the auction closing date, a non-paying bidder alert will be filed with E-Bay.
FEEDBACK: I encourage you to leave “Positive Feedback” once the transaction has been completed and you have received the item. I always leave “Positive Feedback” once it is left for me & this informs me that you have received the item(s). If you have a problem with what was received, please contact me within 24 hours of receipt so I can rectify the issue.
COMMUNICATION: I try to respond to inquiries as quickly as possible. If bidding on an item(s) (if it's an auction) please don’t wait until the last possible minute to ask a question as it may not get answered in time.