Since all fuses, perhaps including output fuses, seem to be on a separate board, any output caps could be there.Ĭould the STK chip cause the power supply board to fry like this? A single supply would also mean that the outputs to the speakers are via a large capacitor. That done, measure the main power supply voltages with respect to ground and check they there is something like +/- 25V or, since I can only see a single ballast resistor for each channel, it could have just a single voltage supply of about 50V. This should be the case, provided the rectifier is Ok, caps are fair and there are no shorts such as you get when someone isn't careful as they shove things that don't work, back together again. If you aren't careful with this, the amplifiers may deliver too much and the little power supply overloads and the fuses blow, before the inbuilt limiting of the chipamp can kick in.īefore buying, it might be wise to remove the power connections from the power supply rectifier and smoothing caps to the amplifier board and test that the power supply is functional when its fuses are replaced and no further problems are apparent. These are cheap, plentiful and work just fine as long as the scant information you get with them is sufficient for correct connections and you have an adequate power supply and heatsinks to suit the same power output as previous, which you'll need to control by the maximum amount of input signal fed to it. These are replaceable with refurbished (very dicey), copied versions (soewhat dicey), pulls (maybe good if the source properly tested them) or NOS parts (no, don't believe it).Ī good, economical and DIY friendly alternative is to remove the hybrids and the rest of the damaged power amplifier section and replace with a current Chipamp design such as LM3886 based modules, kits of parts or just the PCBs. THIS IS THE RISK ALL OF US TAKE WHEN PURCHASING ANY MECHANICAL OR ELECTRICAL VINTAGE ITEM.Considering the blown fuses, its most likely that one or both STK082 hybrid power amp. THIS UNIT MAY WORK FOR YEARS TO COME WITHOUT ANY ISSUES, BUT MAY REQUIRE IMMEDIATE TO FUTURE SERVICING. PLEASE BE AWARE THERE IS ALWAYS INHERENT RISK WHEN PURCHASING 40-50 YEAR OLD EQUIPMENT. Territories, Canada, or the rest of the world, please contact me for a quote first!****** ******Shipping is for the Contiguous United States ONLY. Input sensitivity: 2mV (MM), 150mV (line) Power output: 100 watts per channel into 8Ω (stereo) The backplate has the only scratches, from installing components, antennas and speakers - but nothing major.Ĭleaned, dusted, lubricated, deoxidized, inspected and tested. The power transformer on this thing is absolutely massive! The inside looks just as good as the outside.
If you look really, really closely, you will find one or two dings on the underside of the faceplate, about the size of the period at the end of this sentence. Sound is amazing, easily the equal of Marantz, Pioneer or Sansui of equal power.Ĭosmetically gorgeous, with almost no signs of use.
Features two tape monitors, two phono inputs, one aux input, built in equalizer, equalizer on/off switch, filters - FM MPX and subsonic on/off, mono mode on/off, loudness contour on/off, FM muting on/off, both tuning and signal meters and both left, right power watts meters.Įvery function, knob, button, input, output tested and working as intended, with one exception: the power outlets on the back were disconnected when a previous owner replaced the power cord on this unit with a grounded, super heavy-duty cord and plug. They were the first to build a coaxial speaker.
Fisher rs 717 specs full#
They were the first to have a Hi-Fi capable of the full 20-20,000Hz spectrum. Fisher is generally known to be the first company to introduce separate audio components. They made the first Hi-Fi system in 1937. Fisher is most famous as the originator of the transistor amplifier. This was the first receiver with a multi-band graphic equalizer that didn't use knobs. Ultra-rare to find one fully functional and in this condition. Handmade record players my specialty! Check out my shop for custom turntables and receivers, hand-built speakers, radios, vinyl and other vintage audio goodies!įisher Studio Standard AM/FM stereo receiver model RS-2010įor sale is a nice example of the very best receiver Fisher offered in 1978.
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