Sansui77 1,520 Posted October 19 Author Share Posted October 19 On 26/09/2020 at 7:09 PM, Luc said: Got any blacker? 😉 Black faced Sansui's..... I do 😉 Quote Link to post Share on other sites
pete_mac 3,875 Posted October 19 Share Posted October 19 (edited) If you intend to use the 517 as a preamp, you can use either option as these options only apply to the "power amp in" connections when using the amplifier as a power amplifier. The "Capacitor Coupled" setting sits two small capacitors in the signal path to remove the DC before the signal reaches the amplifier circuit. This is mainly relevant if the pre-amplifier or source has DC voltage on the output, which could trigger the 517's power amp protection circuit, or result in excessive DC at the amplifier's output. The "Direct Coupled" setting connects the pre-amplifier or source directly to the amplifier circuit. The snips from the user manual below may help, and this diagram below might help if you are schematically inclined. The red arrows indicate the signal path flow, S01a is the connected/separated switch on the rear panel, and the two 'eyes' in the top left of the diagram are the RCA input and output connections. Edited October 19 by pete_mac 6 Quote Link to post Share on other sites
Luc 9,971 Posted October 21 Share Posted October 21 On 19/10/2020 at 7:40 PM, Sansui77 said: Black faced Sansui's..... I do 😉 I've seen the pics😎...lovely lovely things! Quote Link to post Share on other sites
sloper 484 Posted October 21 Share Posted October 21 Goodaye all Summer is here and we are locked down locked down, been working in the carport instead of the garage. No Sansui, just a old Onkyo and Tannoy speakers on the decking. Having bad thoughts (again) need another Sansui and dont have a spare, there all in use. So need another one, will be out on the decking so dont want to put a big $$$ one there, but l could shuffle others. Could there be better in summer drinking beer and playing tunes for the whole neighbourhood. At least thats all we are allowed to do. As for emans 517 recapp it and then see how you feel about using it as a preamp. regards Bruce 1 Quote Link to post Share on other sites
eman 1,243 Posted October 21 Share Posted October 21 1 hour ago, sloper said: Goodaye ....... As for emans 517 recapp it and then see how you feel about using it as a preamp. regards Bruce I've a few problems with doing that. Only possible if there's someone who can do it in Canberra and pickup and deliver. Quote Link to post Share on other sites
eman 1,243 Posted November 15 Share Posted November 15 Well that didn't last long. I've used this AU 517 for less than 6 months and the left channel has stuffed up on speakers A & B. I'm presuming it's something on the output side. Was thinking of using it as a pre amp anyway and I've got a custom hybrid Tube/D class integrated on the way too. Watch this space for a possible Sansui AU 517 sale, (especially if you're in Canberra ). Quote Link to post Share on other sites
muon* 2,400 Posted November 15 Share Posted November 15 39 minutes ago, eman said: Well that didn't last long. I've used this AU 517 for less than 6 months and the left channel has stuffed up on speakers A & B. I'm presuming it's something on the output side. Was thinking of using it as a pre amp anyway and I've got a custom hybrid Tube/D class integrated on the way too. Watch this space for a possible Sansui AU 517 sale, (especially if you're in Canberra ). It's definitely worth getting fixed. Has it been recapped ect? Quote Link to post Share on other sites
eman 1,243 Posted November 15 Share Posted November 15 6 hours ago, muon* said: It's definitely worth getting fixed. Has it been recapped ect? Pretty sure it's all original. Only got it this year. So it might be mate, but I've got mobility issues so I won't be hauling this around town to post it somewhere. If someone in Canberra can pick up and deliver it might get done, otherwise .... Quote Link to post Share on other sites
pete_mac 3,875 Posted November 15 Share Posted November 15 8 hours ago, eman said: Well that didn't last long. I've used this AU 517 for less than 6 months and the left channel has stuffed up on speakers A & B. I'm presuming it's something on the output side. Was thinking of using it as a pre amp anyway and I've got a custom hybrid Tube/D class integrated on the way too. Watch this space for a possible Sansui AU 517 sale, (especially if you're in Canberra ). What are the symptoms? First port of call with the 517/717 is the connected/separated switch on the rear panel. Work it back and forth 30 times or so and see if it comes good. If it does, it will require a proper clean with a lubricating contact cleaner to stop it happening again. 2 Quote Link to post Share on other sites
eman 1,243 Posted November 15 Share Posted November 15 1 hour ago, pete_mac said: What are the symptoms? First port of call with the 517/717 is the connected/separated switch on the rear panel. Work it back and forth 30 times or so and see if it comes good. If it does, it will require a proper clean with a lubricating contact cleaner to stop it happening again. Hmmmm...... ok thanks, I can wiggle a switch. Symptom is very low volume on left channel. 1 Quote Link to post Share on other sites
muon* 2,400 Posted November 15 Share Posted November 15 2 hours ago, eman said: Pretty sure it's all original. Only got it this year. So it might be mate, but I've got mobility issues so I won't be hauling this around town to post it somewhere. If someone in Canberra can pick up and deliver it might get done, otherwise .... 2 hours ago, pete_mac said: What are the symptoms? First port of call with the 517/717 is the connected/separated switch on the rear panel. Work it back and forth 30 times or so and see if it comes good. If it does, it will require a proper clean with a lubricating contact cleaner to stop it happening again. Oi! Doctor in the house 1 Quote Link to post Share on other sites
pete_mac 3,875 Posted November 15 Share Posted November 15 59 minutes ago, eman said: Hmmmm...... ok thanks, I can wiggle a switch. Symptom is very low volume on left channel. Time to get your wiggle on!! 1 Quote Link to post Share on other sites
eman 1,243 Posted November 17 Share Posted November 17 On 16/11/2020 at 10:58 AM, pete_mac said: Time to get your wiggle on!! Wiggled that pre/power switch a decent amount and there's no difference. Wouldn't it be both channels if that was the problem. My Right side is fine. Left is very low in speakers A & speakers B. Quote Link to post Share on other sites
pete_mac 3,875 Posted November 17 Share Posted November 17 5 minutes ago, eman said: Wiggled that pre/power switch a decent amount and there's no difference. Wouldn't it be both channels if that was the problem. My Right side is fine. Left is very low in speakers A & speakers B. Not necessarily - the switch can cause intermittent issues in one or both channels. Bugger that the wiggling hasn't resolved it. It could be any number of things. I'd also suggest cleaning all switches with a lubricating contact cleaner and working them through their range of motion to ensure there's no oxidation causing the issue. This incudes the tape play switches - they can also cause drop-outs. If this doesn't fix the problem - unfortunately it could be any number of things, and input from a tech will be required. 2 Quote Link to post Share on other sites
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