Vintage Fisher 500-c Tube Stereo Amp & Fm Receiver Fully Restored, New Tubes
Monday, June 11th, 2018
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. Chassis clean , but with 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, Bias adjusted to -19 vdc. Normal residual ripples within specs. Current in-rush limiter enclosed. Line suppression safety caps replaced. Filter electrolitics reformed to spec, no residual ripples. FM & IF Stages: FISHER tubes selected for spec Gm, long life, no gas or micro-phonics. Tube specs in folder with manuals. All small electrolitics replaced with modern high quality components. This was followed by a fine fm &if alignment with high quality laboratory equipment , resulting in high sensitivity: 1.4 uV in the -20 dB quieting test, better than spec. Signal strength in meter is 4.5/5 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 excellent overall separation of 35 dB. AUDIO STAGE: New Tung-Sol 12ax7 tubes. 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 caps. Loudness and filter networks recapped. Coupling caps replaced with PIO (paper in oil) and orange drop caps. Audio caps replaced with polypropylene Power grids upgrade installed. Results: Excellent sine, square and triangular signal output. NO hum, dead silent receiver & amp. Max total audio pwr 78 wt rms, Rt&lft ch max pwr 39 wts. Total Harmonic distortion (THD)plus noise measured at rt ch=0.1%, lft ch 0.1%. Frequency response +/- 1 dB 20 hz to 20 khz both ch. IMD plus noise(inter-modulation distortion) 0.2%. All 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. Requests for custom electronic modification will be considered. Ships to USA, foreign buyers please inquire cost and conditions. No extended warranties offered, but with this restoration a long life is expected. The item “VINTAGE FISHER 500-C TUBE STEREO AMP & FM RECEIVER FULLY RESTORED, NEW TUBES” is in sale since Saturday, May 26, 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.
- Model: 500-C
- Country/Region of Manufacture: United States
- Type: Integrated Amplifier
- MPN: Does Not Apply
- Brand: The FISHER
