Solid State Stereo
Solid State Stereo
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 Accuphase T 101 FM Stereo Tuner  US $650.00
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 Sony TC 350 Reel to Reel Tape Recorder EUC Works US $79.00
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 Vintage Onkyo Model T 4055 Solid State AM FM Stereo Tuner US $29.99
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 Vintage Sony Solid State AM FM stereo receiver tuner ST 5600 Japan wood grain US $19.99
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 Realistic Solid State Stereo Pre Amplifier 42 2930 in original Box US $15.99
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 Harmon Kardon Vacuum Tube Integrated Amplifier Receiver for rebuild or parts US $99.00
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 vintage realistic solid state stereo receiver sta 36 US $45.00
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 Sansui 5000a Solid State Stereo Receiver Tuner Amplifier Amp AM FM US $79.00
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 HH Scott Scotsman Stereomaster 342 Wide Band FM Receiver US $125.00
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 Sears AM FM home stereo receiver US $150.00
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 Kenwood Solid State AM FM Stereo Receiver KR 5400 US $50.00
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 VINTAGE SANSUI MODEL 3000A SOLIDSTATE AM FM STEREO RECEIVER VERY NICE US $189.00
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 Pioneer SX 828 Stereo Receiver Vintage Audiophile No Reserve SX828 US $66.00
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 VINTAGE WESTBURY STEREO TUNER RECIEVER 8 TRACK MODEL WP 8000 US $14.99
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 McIntosh C 26 Solid State Stereo PreAmplifier US $366.00
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 Sony Excellent condition Works great STR 6055 great sounding AMFM Phono Receiver US $2.25
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 DavidyeeAudio Handmade Solid state Stereo power amp very nice heavy duty power US $12.50
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 DavidyeeAudio Handmade Integrated Stereo amplifier CD Phono dual input Tone ontr US $.01
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 VINTAGE MAGNAVOX AM FM STEREO TUNER PREAMP IP4001 ASTRO SONIC IMPERIAL CONSOLE US $26.00
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 vintage Realistic SA 10 Solid State Stereo Amplifier Perfect and Mint US $24.47
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 vintage Dynaco FM3 tube Fm radio tuner 3 match ST70 300B 2A3 El34 6L6 amplifier US $350.00
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 Vintage SEARS Solid State AM FM Stereo 8 EIGHT TRACK PLAYER Portable Radio WORKS US $35.74
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 Harman Kardon 330A AM FM Stereo Solid State Receiver Dealer Brochure Specs US $12.99
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 Realistic Solid State Stereo Pre Amplifier Vintage 42 2101A Radio Shack US $3.99
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 VINTAGE KENWOOD STEREO AMP KA 8004 US $250.00
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 GENERAL ELECTRIC SOLID STATE STEREO VINTAGE WORKS GREAT US $9.99
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 Admiral The Emperial 3 piece Stereo Unit US $10.00
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 Phase Linear PL400 Amp Upgrade LED Light PCB Kit US $32.00
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 Vintage Sansui RA 500 5000A Combo Stereo Solid State AMP Amplifier US $69.00
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 Vintage Silvertone Stereo Tube Amplifier 10WPC Sovtek EL84M Mullard 12AX7 US $199.00
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 Dynaco Stereo 400 solid state amplifier professionally serviced no problems US $500.00
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 Vintage Marantz 2235B Stereo Receiver US $58.00
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 Harmon Kardon 50 Quad 25 Real WPC Free Domestic Shipping Serviced Very Rare US $154.00
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 Harmon Kardon 930 45 Real WPC Free Domestic Shipping Serviced Nice Near Mint US $363.00
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 Harmon Kardon 330A 20 Real WPC Free Shipping Professionally Serviced Nice Clean US $154.00
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 Heathkit IM 25 Vintage Analog Laboratory Grade Solid State Multimeter Deal US $67.50
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 Vintage Motorola Solid State Stereo 8 Track Player Excellent Condition US $49.99
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 Vintage 1970 Panasonic FM AM 8 Track Stereo Entertainment RS 820S The Bainbridge US $125.00
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 SAE Solid State Stereo Power Amplifier Model 2200 AS IS NEEDS WORK US $9.99
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 Vintage Westinghouse Solid State 60 24 Transistor AM FM Stereo Table H 394 A US $9.99
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 Sansui TU 777 FM Stereo AM Tuner Solid State Radio Schematic US $159.95
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 Readers Digest 8 Track Player Model RD 60 US $24.99
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 VINTAGE SANSUI 3000 AM FM STEREO RECEIVER HIFI TUNER AMPLIFIER SOLID STATE NR US $49.99
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 ACOUSTECH XII SOLID STATE AMPLIFYING SYSTEM STEREO INTEGRATED HIFI AMPLIFIER NR US $49.99
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 Vintage Panasonic SA 700A Solid State Stereo Receiver US $44.99
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 SONY TC 105A 3 Speed Reel to Reel Tape Recorder w Built in Speaker NICE US $149.00
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 YAMAHA CR 1000 STEREO RECEIVER SWEET VINTAGE US $197.50
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 KENWOOD TK 66 AM FM SOLID STATE STEREO RECEIVER INSTRUCTION MANUAL US $4.80
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 Vintage Sony Stereo Reel to Reel Tape Recorder Model TC 255 MfgJapan 1969 US $9.99
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 VINTAGE JULLIETTE AM FM STEREO FU 2222X JAPAN US $75.00
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 KENWOOD SOLID STATE AM FM STEREO TUNER KT8005 US $300.00
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 Kenwood KR 6005 AM FM stereo or mono vintage solid state tuner serviced US $119.00
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 Beautiful Vintage Marantz 4270 Quadraphonic Receiver Fully Restored US $1,295.00
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 Realistic Vintage Solid State Pre Amplifier Nice Working Condition US $4.99
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 Sony TC 366 Solid State 3 Head Tapecorder With Manual US $59.95
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 Vintage Instruction Manual KENWOOD KT 5000 Stereo Tuner US $2.99
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 VINTAGE KENWOOD KR 6200 STEREO RECEIVER NICE US $49.99
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 Vintage GE Trimline Stereo 400 Record Player Antique 1960s Phonograph Portable US $205.00
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 1966 67 Kenwood TK 88 Solid State Stereo Reciever in Awesome Working Condition US $199.99
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 DYN SONIC DS 800 solid state 8 track stereo tape player made in JAPAN US $6.99
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 Vintage 1979 McIntosh MC2205 Solid State Stereo Power Amplifier Amp 200wpc NICE US $1,699.00
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 vtg RCA Tabletop transistor radio AM FM RZC280S solid state stereo US $4.99
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 VTG SANSUI AU 9900 Integrated Amplifier Amp Pre US $107.50
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 Soundcraftsmen MA5002 Power Amp Amplifier over 250 watts per channel US $152.50
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 Vintage Thomas Model 2012 AM FM Stereo Receiver Amp Amplifier Radio US $27.00
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 Original Heathkit AA 18 Solid State Amplifier Manual US $12.50
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 VTG SANSUI 5000 X Tuner Amplifier Amp Pre Receiver US $11.50
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 McIntosh Mac 1900 Stereo Receiver Amp w Slanted Cabinet Very Nice for Repair US $102.50
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 Vintage 5 inch Portable SR 3000 Black White TV AM FM Stereo Radio Nice US $24.50
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 VTG SANSUI 4000 Amplifier Amp Pre Receiver Solid State US $.99
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Abbe Refractometers
Refractometers are measuring instruments which put the phenomenon of light refraction (bending) to practical use. They are based on the principle that as the density of a substance increases (such as when sugar is dissolved in water), its refractive index rises proportionately. Refractometers were devised by Dr. Ernst Abbe, a German/Austrian scientist in the early 20th century.
The prism in a refractometer has a greater refractive index than the sample solution. Measurements are read at the point where the prism and solution meet. With a low concentration solution, the refractive index of the prism is much greater than that of the sample, causing a large refraction angle and a low reading. The reverse (lower refraction angle and higher reading) would happen with a highly concentrated solution.
Abbe Refractometers are a type of refractometer used for measuring the refractive index of solid samples, such as glass, plastics and polymer films. There are two detection systems for refractive index: transparent systems and reflection systems. Hand-held refractometers and Abbe refractometers use transparent detection systems, and digital refractometers use reflection detection systems. Abbe refractometer readouts can be either digital or analogue.
Abbe refractometers are used most often to measure solid samples – something that standard digital refractometers cannot do. Circulating water baths can be added to control instrument and fluid temperature in Abbe refractometers. Newer versions of Abbe refractometers have recently been upgraded to include solid state Peltier elements to both heat and cool the refractometer so that you no longer need to use a waterbath. Another modern feature is the ability to link the Abbe refractometer to a computer to control the instrument and to record readings.
Some Abbe refractometers can measure at wavelengths other than the standard 589 nanometers, using filters on up to the near infrared range. They are referred to as Multi-wavelength Abbe refractometers. Multi-wavelength Abbe refractometers can be used to easily determine a sample's Abbe number, which is a measure of the material's dispersion (variation of refractive index with wavelength) in relation to the refractive index. These multi-wavelength Abbe refractometers can be used to test eyeglass lenses, contact lens materials, optical plastics for optical communication, compact disk materials and insulating oil.
Other accessories that are available include digital printers, extra filters and near-IR viewers.
About the Author
National Microscope Exchange has been in business since 1991, selling and servicing abbe refractometers, refractometers and microscopes. The service staff has 30 years of experience with microscopes, and is the authorized United States service facility for Atago brand refractometers, abbe refractometers .