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About sloper

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  1. Goodaye all Just aquired a pair of Marantz model 6 Mk11 Need some work on the enclosures, Question is do l use the walnut vinyl wrap or veneer them the same as the DS920's that l will be using them with? l would be making new sides, tops and bottoms, grills will get new cloth. regards Bruce
  2. Test points on early Sansui AU amps

    Thanks Trevor Didnt think at the volume pot. regards Bruce
  3. Test points on early Sansui AU amps

    Both right channels are out. regards Bruce
  4. Goodaye all Finaly getting some time to fix my AU 505. what l need is the test points from the tone board to amp board, they are connected via a number of wires. So which is which? Checked transisters in place and they seem good but???? So need to isolate which board to look at. Yes l have a basic scope. regards Bruce
  5. Goodaye all l would suggest its the other way around, the CD is loosing bits not the computer. l am amazed that people think PC's loose bits everywhere, if that was so the modern world would fall over. The DAC probley has no error correction and only plays what data it gets. The cd player is loosing maybe byte's not bits and you can hear the difference and prefer this to the more accurate PC output. regards Bruce
  6. Goodaye all Need to get a cross reference on FM tuning transformers for my TU505. Dead FM, been diagnosed as one of the following. We have Sansui part numbers with no values an no other markings. 4235890 4235900 4235750 4235760 4235770 4235780 Even better if you have these bits. regards Bruce
  7. Goodaye all Built my own switch. Used a 2 pole change over switch that switches the positive outputs of the amps over. Ground is common. Sits in a RS black case with all the inputs and outputs on the back. Both amps cannot be on the speakers at the same time. You would make sure your amp leads are correct polarity of course. regards Bruce
  8. Shorted Sansui amp.

    Goodaye all Ok l'll stay with you. Did a in circuit test on the power and power board transistors they seem ok, but l dont trust that. Have a BC 639 in my box of tricks. Will do a test on the tone board. If all else fails l'll swap out one at a time and test. l'll swap one of the power transistors from the left side to check as well when l get to it. regards Bruce
  9. Goodaye all Working in the garage today and had tool that was hanging up go through a speaker cable when it fell. Blew the fuse on the right channel of the Sansui AU505, no worries fixed the cable and put a new fuse in. Crackley and distorted right channel, grrrrrr. A and B speakers the same so for the moment l will rule out the power transistors. New over specked tone board transistors, hmm maybe. Power board original transistors, suspect. Go to the cupboard for the freeze release to spray the transistor to diagnose, grrrr out of it. Ok will pickup a can tomorrow at work. Went through my bits and have substitute transistors for all except 2SC875-3 what would people recomend as a sub? A NTE128 maybe? Anything else l should consider? It has new caps. regards Bruce
  10. Goodaye how are you testing resistors? Seems a lot of faulty ones. regards Bruce
  11. Long speaker cables 10 meter

    Goodaye all Just finished running RG213 speaker cable's to the Marantz and Sansui system. Some cable had to go under the house and pop up by the speaker. Sansui was finished first and fired up, l could notice more detail, the wife says it clearer. 2m cable and 3.5m cable The Marantz system came alive, never been so clear or detailed. Had considered capping it, but not now. More woodwork too tighten. 2m cable and 4.5m cable. l had been useing 12 AWG fig8 as connects for years, not any more. Just need to find a more flexable cable for use on sattlite speakers and car speakers. The garage Sansui system will be a challenge. It will require a 20m, 14m, 7m and 2m run. regards Bruce
  12. High End prices....why so expensive?

    Its easy, its the Australia TAX, everything costs more for us. regards Bruce
  13. Goodaye https://www.gme.net.au/catalogue/accessories/power-leads-and-cables/rg58au.aspx l was looking for new truck radio's at the time. regards Bruce
  14. Goodaye Have done 2 AU101 an AU505 now, apart from a couple of dumb mistakes got them done easily. The first 101 l got original transistors off ebay from England, used Panasonic and Nichon caps from RS. It had a bad tranny on the tone board, replaced all and it came good, then did the caps. Then modded it. The second 101 has A Fairchild replacement transistors on the tone board Had a bad tranny on the power board, found that by tapping it, matched 2 transitors as replacement. Also replaced 2 power transistors as they were mismatched. Then capped it and modded it. They sound a little different now, took the panasonic coupling cap modds off and used the Jaycar crossover caps, sounds much better got some Jantzen coming some may try those. l 'll admit l put one leg of the power cap in a support hole. The 505 has fairchild transistors in the tone board as one was making the left channel scratchy. (note spec sheets for the replacement was top view original bottom view, yes l did put them in the wrong way around ) Fitted and modded he caps. Eviel bay will get you original transistors, they will cost a little more and l would avoid buying from China. Modern transistors and caps l used RS. Do it all in stages and test it. And l need to thank a certain member, he knows who he is. regards Bruce
  15. Many thanks. It was the 50ohm mentioned that made me think. regards Bruce