wink Posted September 1, 2014 Report Posted September 1, 2014 Would it be a good idea to put the current bias on the back panel eg. 5,5mA, 10mA or 14 mA etc...? Concealed bragging rights for the win....
spritzer Posted September 1, 2014 Report Posted September 1, 2014 It's quite clear to anybody when they touch this thing how "hot" it is running. For the record this one is running at 9mA which is what the old KGSS ran at. The whole "MOAR CURRENTZ!!!" issue is not something I'd like to play up as I'd dare anybody to double blind two identical amps and tell me which is which. 5.5mA means the amp stays in Class A at all times so more current as making some drastic difference is over rated. When we started with the KGSSHV this was discussed quite a bit as I wanted onboard sinks but Kevin pushed for offboard only. He relented only after it was clear the amp would be just fine at the lower current, hell we could make a portable version and it would still be good.
wink Posted September 2, 2014 Report Posted September 2, 2014 So, the only difference is that the higher current units' sound signatures would be only discernible by dogs, cats and bats.......
spritzer Posted September 2, 2014 Report Posted September 2, 2014 Well yeah and there are subtle changes elsewhere but they are small enough to be blown out of proportions by the changes in temperature.
Ali-Pacha Posted September 9, 2014 Report Posted September 9, 2014 Whenever you're building black front plated mini KGSSHV with both normal and pro outputs, I'm first on the line Ali
spritzer Posted September 9, 2014 Report Posted September 9, 2014 That can't be done so it would be a long time waiting... Not interested in putting NB outputs on my amps though I do get requests.
Ali-Pacha Posted September 10, 2014 Report Posted September 10, 2014 I could live without NB output Back to lurking Ali
wink Posted September 10, 2014 Report Posted September 10, 2014 Mine has a normal bias as well as 2 pro bias...... Moar is bettah......
spritzer Posted September 10, 2014 Report Posted September 10, 2014 I got the black boxes so I'll drop them off to be etched soon. Then we'll see if the finish holds up... The one Tyll got has 4 outputs. No chance to do two of them on the mini HV as there just isn't enough room. It's very cramped in there...
Ali-Pacha Posted September 10, 2014 Report Posted September 10, 2014 Mini size is far more appealing than a bunch of outputs, indeed. Ali
spritzer Posted September 10, 2014 Report Posted September 10, 2014 Given that it is about the same size as the SRM-323 and pushes the SR-Omega I'm using now with ease... I'd say so too.
s_r Posted September 10, 2014 Report Posted September 10, 2014 Have you measured the temperature on the tiny HVs? My small HV gets hotter than my old behemoth, but then that's no surprise. Still only 50C (give or take) on the sinks & top cover when it's warmed up.
DefQon Posted September 11, 2014 Report Posted September 11, 2014 Are 350v (700v max) rated 1-2watt PPP, Panny ERG and Kiwame resistors ok? I've got another set of newer rev 0.6 offboard's with the feedback jumpers coming soon and I plan to build this one with extra special parts.
luvdunhill Posted September 11, 2014 Report Posted September 11, 2014 In my opinion, no. They do funny things at that point. Xicon or Panny HVR37 would be my recommendation.
luvdunhill Posted September 11, 2014 Report Posted September 11, 2014 In my opinion, no. They do funny things at that point. Xicon or Panny HVR37 would be my recommendation. I will rephrase. If there are 350v across the resistors, then no. Otherwise, do what you please. Your question was unclear
DefQon Posted September 11, 2014 Report Posted September 11, 2014 (edited) Well I'm planning to use them in my next rev 0.6 offboard build on the amp board and the PSU board (HV where appropriate). I've seen spritzer use the PPP and Kiwame in his builds and looking at the spec sheets and they are rated at 350v normal operating voltage with a max at 700v. The Xicon's on mouser that are mostly recommended here are rated the same (and used in my current 0.4). So the question is, are the 1 to 2 watters ok to use? They have ceramic coating and not the inductive stuff like the RN50 and equivalent Dales. Edited September 11, 2014 by DefQon
luvdunhill Posted September 11, 2014 Report Posted September 11, 2014 Depends on the actual voltage across the resistor, not the wattage or coating.
DefQon Posted September 11, 2014 Report Posted September 11, 2014 (edited) http://industrial.panasonic.com/www-data/pdf/AOA0000/AOA0000CE18.pdf http://www.koaproducts.com/pdf/spr.pdf 350v (700 max) for Panny erg Kiwame (Koa) SPR2 500v (700-1000v max) Edited September 11, 2014 by DefQon
spritzer Posted September 11, 2014 Report Posted September 11, 2014 Have you measured the temperature on the tiny HVs? My small HV gets hotter than my old behemoth, but then that's no surprise. Still only 50C (give or take) on the sinks & top cover when it's warmed up. Most of the work done on the mini in the last few months has been to monitor the temp and seeing how it behaves in warmer climates. It runs at about 20-25°C over ambient and is a bit warmer inside. Not too bad.
luvdunhill Posted September 11, 2014 Report Posted September 11, 2014 http://industrial.panasonic.com/www-data/pdf/AOA0000/AOA0000CE18.pdfhttp://www.koaproducts.com/pdf/spr.pdf 350v (700 max) for Panny erg Kiwame (Koa) SPR2 500v (700-1000v max) That's nice. Do you believe everything you read?
DefQon Posted September 11, 2014 Report Posted September 11, 2014 (edited) That's nice. Do you believe everything you read? That depends I have had positive experience with both and use Kiwames on a daily basis but HV application such as the KGSS that's where I want to know if it falls within the scope of being usable or not. I doubt both manufacturers will spoog the specs on the datasheets. Edited September 11, 2014 by DefQon
luvdunhill Posted September 11, 2014 Report Posted September 11, 2014 (edited) Ok. I have answered your question with my posts above... Edited September 11, 2014 by luvdunhill
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