This player came in with an almost dead laser assembly and power supply problems. It was very difficult and very expensive to find a new CDM4/D36 mechanism, but as it turns out the laser head from CDM4/19 is identical and after about 2 months I finally found a NOS CDM4/19 and removed the new laser head from it and placed it inside the old CDM4/D36 mechanism. I also changed main power supply rectifiers and capacitors with better components and of course all of the remaining electrolytic capacitors because after 15 years they were causing weird problems from the servo to the dac Output opamps were also changed from ne5534 to opa627. It is interesting to note that this player has 2 tda1547 1-bit dacs, however after the rebuild it sounds much better than many new cd-players having 24-bit dacs I personally have never heard a 1-bit cd player to play that good.
Showing posts with label Restoration. Show all posts
Showing posts with label Restoration. Show all posts
Friday, October 19, 2012
Marantz CD-10 Restoration Finished
Marantz CD-10 Restoration Finished Tube. Duration : 0.58 Mins.
This player came in with an almost dead laser assembly and power supply problems. It was very difficult and very expensive to find a new CDM4/D36 mechanism, but as it turns out the laser head from CDM4/19 is identical and after about 2 months I finally found a NOS CDM4/19 and removed the new laser head from it and placed it inside the old CDM4/D36 mechanism. I also changed main power supply rectifiers and capacitors with better components and of course all of the remaining electrolytic capacitors because after 15 years they were causing weird problems from the servo to the dac Output opamps were also changed from ne5534 to opa627. It is interesting to note that this player has 2 tda1547 1-bit dacs, however after the rebuild it sounds much better than many new cd-players having 24-bit dacs I personally have never heard a 1-bit cd player to play that good.
This player came in with an almost dead laser assembly and power supply problems. It was very difficult and very expensive to find a new CDM4/D36 mechanism, but as it turns out the laser head from CDM4/19 is identical and after about 2 months I finally found a NOS CDM4/19 and removed the new laser head from it and placed it inside the old CDM4/D36 mechanism. I also changed main power supply rectifiers and capacitors with better components and of course all of the remaining electrolytic capacitors because after 15 years they were causing weird problems from the servo to the dac Output opamps were also changed from ne5534 to opa627. It is interesting to note that this player has 2 tda1547 1-bit dacs, however after the rebuild it sounds much better than many new cd-players having 24-bit dacs I personally have never heard a 1-bit cd player to play that good.
Wednesday, October 17, 2012
Wollensak 4800 Rebirth: Cassette Recorder Restoration Video!
Wollensak 4800 Rebirth: Cassette Recorder Restoration Video! Video Clips. Duration : 9.78 Mins.
Curing "Melted Belt Gunkification." The Wollensak 4800 vintage cassette recorder was made in Holland for the 3M Company by the Philips Company, known in the US as Norelco. The Wollensak audio machine is almost identical to the Norelco Carry-Corder 150, made in approx. 1967. The only differences seem to be surface cosmetics. It can be seen in some Wollensak ads from 1967. This vintage cassette machine was bought on E-Bay and arrived DOA (Dead On Arrival). Inspection of the cassette recorder revealed the cause of death as "Melted Belt Gunkification". This technological disease is sometimes called "Ampex Syndrome" and "Teac's Complaint" because it is the same on all these machines. The belts are not made of rubber, but a petroleum distillate mixture that breaks down over time, especially if the machine is stored and not used. The result is the belt literally melts into a type of "gunk", a gooey, sticky tar like substance that gets all over the inside of the machine. In spite of this slow degenerative technological disease, vintage audio machines that have died can be reborn when the "gunk" is cleaned out using simple ammonia based household window cleaning fluid (which dissolves the gooey mess) and the belts are then replaced (with rubber this time, please!) Fortunately, the Wollensak 4800 vintage cassette recorder had no damage to its amplifier or motor control circuit, so it was easy to bring it back to life. This video shows how. About the Title Music: The title music to ...
Curing "Melted Belt Gunkification." The Wollensak 4800 vintage cassette recorder was made in Holland for the 3M Company by the Philips Company, known in the US as Norelco. The Wollensak audio machine is almost identical to the Norelco Carry-Corder 150, made in approx. 1967. The only differences seem to be surface cosmetics. It can be seen in some Wollensak ads from 1967. This vintage cassette machine was bought on E-Bay and arrived DOA (Dead On Arrival). Inspection of the cassette recorder revealed the cause of death as "Melted Belt Gunkification". This technological disease is sometimes called "Ampex Syndrome" and "Teac's Complaint" because it is the same on all these machines. The belts are not made of rubber, but a petroleum distillate mixture that breaks down over time, especially if the machine is stored and not used. The result is the belt literally melts into a type of "gunk", a gooey, sticky tar like substance that gets all over the inside of the machine. In spite of this slow degenerative technological disease, vintage audio machines that have died can be reborn when the "gunk" is cleaned out using simple ammonia based household window cleaning fluid (which dissolves the gooey mess) and the belts are then replaced (with rubber this time, please!) Fortunately, the Wollensak 4800 vintage cassette recorder had no damage to its amplifier or motor control circuit, so it was easy to bring it back to life. This video shows how. About the Title Music: The title music to ...
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