![]() The meters always come up bright in photos but have a nice warm sharp look as well. As with most Sansui models it was best to reverse the bulbs in the dial and let the diffuser disperse the light into the dial. The dial and tuning meter lamps were replaced with warm white LEDs. Here is a picture of the removed part carnage. Signal path caps replaced with stacked film and Elna Silmic II again, and 2SC1333 transistors replaced with Fairchild KSC1845. I found it possible to pull slightly down on the front panel and the board was able to be turned and lifted out. The front of the chassis needs to be unscrewed and the controls unfastened from the front panel. Lastly, the preamp is very difficult to gain access to. There was a significant drop in the noise floor of the phono section after the work. There was a pair of tantalum caps on this board which was also replaced with Panasonic FC electrolytic. Stacked film caps were used for the 1uf in the signal path and Elna Silmic II caps were used for the 3.3uf in the signal path. The phono preamp is locates under the chassis in the back left corner. Capacitance was increased slightly and stacked film bypass caps were installed under the chassis to help with low and high frequency response. #BI POLAR CAPS IN SIGNAL PATH SERIES#The amplifier filter capacitors were replaced with new Panasonic THA series which fit perfectly into the original mounting holes on the PCB. New capacitors and replaced the Omron speaker protection relay with new. Next up was the power supply and protection circuit. The two pairs of input differentials 2SA726 replaced with KSA992. New Panasonic capacitors, low leakage caps replaced with stacked film, and bipolar caps replaces with Nichicon ES. After the work I’m glad he did since the receiver sounds as great as it looks. The RCA sockets aren’t gold-plated and the circuit itself is balanced to express the designers’ emphasis on fully symmetrical operation.This Sansui 6060 was purchased by Ed and he wanted the unit restored. The overall construction is very solid and draws attention with its oversized power supply, discrete volume control circuit and Mosfet-based buffering and voltage gain. Polypropylene caps nicely decouple the power supply rectifier diodes. Adjacent are many filter capacitors of varying sized including 6 x 10.000uF audio-grade Nover units and 14 smaller Rubycons. Scuse me Harald, are these bipolar caps for AC levels or electrolytic for DC Harald Kapp Moderator. It consists of many multi-stabilized and filtered stages powered by a Hegel-made triple-secondary toroid. Parallel capacitors will increase capacitance, but in series capacitance decreases yet the working voltage increases when you connect them correctly (e.g.- 2 200WV caps become 1 400WV cap). This accommodates a recording device, external headphone amp or subwoofer.Īs already stated, the power supply section is extremely sophisticated. One of the RCA outputs has jumpers to select between variable/fixed output. Here we see traditional thru-hole construction to rely on premium parts like metalized precision resistors of ultra-tight tolerances. This circuit is based on Hegel’s proprietary SoundEngine concept and consists of two complimentary 2SK2013/2SJ313 Mosfet pairs in a balanced arrangement. Those promise significant current reserves. Here we find pair-matched mid-power transistors. Post attenuation the signal meets the voltage gain section placed close to the rear panel. This array is surface-mounted and powered from a discrete transformer secondary. First the signal enters one of the smaller PCBs mounted above the mother board for the volume control, a nice black Alps potentiometer that’s outside the signal path to merely control a resistor array triggered by transistors. Hegel states that the signal in their preamplifier runs through only two transistors and between one to three resistors. This review page is supported in part by the sponsors whose ad banners are displayed below ![]()
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