Luxkit A3500 is different from other A3500. First, as you know, the OY-15-5k is prone to disconnection, so the transformer has been replaced. The one I used this time is the same shape CSZ-15-5k made by the same Lux.
I think it's a good transformer that has similar sound quality, can be UL connected, and doesn't spoil the appearance. Also, I replaced the MP and OIL capacitors, which are becoming more and more suspicious due to aging, with new film capacitors. Also, replace all diodes with new ones. Add 100 O to the primary input of the output transformer to prevent overcurrent, etc. It has been restored with time and effort. Basically, I made it faithfully to the original circuit diagram. However, due to the terminals on the secondary side of the output transformer, only 8O and 16O are connected. Please note that it is a specification that one terminal does not ring. As for the vacuum tubes, I used three Sylvanian 6GC7s and GT EL34 matched quads because I had them on hand. 6GC7 can be replaced with 6FQ7 or 6AQ8 without changing the circuit. Due to the fixed bias, it is necessary to adjust the bias using a tester when replacing the EL34. After all, the compatibility of the preamplifier power amplifier between luxmans is outstanding, and it handles all genres without difficulty. Also, since this is a vintage item, please be sure to understand the description and carefully read the listing photos before purchasing. Please check the condition, degree, scratches, etc. External dimensions About width 465 x height 168 x depth 206 mm. +++International Buyers - Please Note: +++. ·We do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "hirojp2020" and is located in this country: JP. This item can be shipped to United States, all countries in Europe, all countries in continental Asia, Canada, Australia.