Vintage Tube Amp

Details of electronic restoration and upgrades with post restoration actual specs. CHASSIS: All contacts, switches, sockets and individual pins and pots thoroughly cleaned and lubricated as needed. Front panel, dial and buttons excellent except for minor scratch see pics. Chassis clean , with some residual indelible stains, vintage appearance. POWER SUPPLY:Upgraded with new heavy duty soft-fast recovery diodes and new bias rectifier bridge, and bias electrolytic caps. Upgraded critical resistors to spec voltages, Adjustable Bias adjusted to -19,3vdc, 30mA idle. Normal residual ripples within specs. Current in-rush limiter installed. Line suppression safety caps replaced. Filter electrolitics reformed to spec, normal residual ripples. FM & IF Stages: Vacuum tubes selected for spec Gm, long life, no gas or micro-phonics. Individual Tube specs in folder with manuals. This was followed by a fine fm &if alignment with high quality laboratory equipment , resulting in high sensitivity: 1.1 uV in the -20 dB quieting test, better than factory spec. Signal strength in meter is 4. /5 with simple fm antennae. MULTIPLEX DECODER: New Tung-sol 12AX7′s tubes. Audio path capacitors replaced as well as the electrolytic cap. The decoder stage was fine-tuned with a Fisher 300 multiplex generator (specially designed to service this stage) obtaining an overall separation of 30 dB. AUDIO STAGE: NEW matched quad of Tung-sol 7591 Power Tubes, matched by trans-conductance and idle current. All small electrolytic, mustard caps and some ceramic disc replaced with high quality capacitors. Coupling capacitors replaced with PIO (paper in oil) and orange drop caps. Power grid upgrade installed. Phono upgrade installed , freq response +/1 bd with reverse EQ filter. Results: Excellent sine, square and triangular signal output. NO hum, dead silent receiver & amp. Max total audio pwr 86 wt rms, Rt&lft ch max pwr 43 wts. Total Harmonic distortion (THD)plus noise measured at rt ch=0.08%, lft ch 0.1%. Frequency response of amp +/- 1 dB 30 hz to 20 khz both ch. IMD plus noise(inter-modulation distortion) 0.2%. All are actual post restoration measurements. End result:A huge sound stage, depth and brilliance , full punchy bass, great separation and a to die -for warm and tactile mid range, and sparkling lush highs, finally tested with hours of awesome Fisher sound. No wonder this legend is sought after by collectors and audio buffs alike. Play your CDs , old vinyls, or downloaded blue-tooth music, or simply enjoy the awesome FM stereo reception for years to come. Join the growing number of vacuum tube aficionados. Cabinet not included , but available. The item “VINTAGE FISHER 500-C TUBE STEREO AMP & FM RECEIVER RESTORED, NEW TUBES” is in sale since Sunday, October 21, 2018. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “vintelectra” and is located in Miami, Florida. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Brazil, Colombia, Panama, Jamaica.

• Model: 500-C
• Country/Region of Manufacture: United States
• Type: Integrated Amplifier
• MPN: Does Not Apply
• Brand: The FISHER