nopants Posted January 8, 2015 Report Posted January 8, 2015 (edited) any new info on your super kgst birgir? Edited January 8, 2015 by nopants Quote
spritzer Posted January 8, 2015 Report Posted January 8, 2015 Nope, busy building these... Finishing up the last of my old BH stuff. The black one is running in now. 1 Quote
nopants Posted January 8, 2015 Report Posted January 8, 2015 Looks great, I'm getting started on mine How are you attaching those rings? Adhesive? Quote
spritzer Posted January 8, 2015 Report Posted January 8, 2015 Adhesive would be very much in the vein of Single Power so I use screws. Quote
kevin gilmore Posted January 8, 2015 Author Report Posted January 8, 2015 singlepower would have used super glue. just like he did on all of those blackgate caps Quote
nopants Posted January 8, 2015 Report Posted January 8, 2015 Let's try to be positive- custom, proprietary dampening compound Quote
spritzer Posted January 8, 2015 Report Posted January 8, 2015 The Russian Blue Hawaii (FluxLab) uses a lot of adhesive which tends to get not so adhesive when it warms up. Top tip, glue and a 200W space heater doesn't mix. Funny enough that BH and it's sister amp run pretty cool for the breed. Much cooler than the BHSE for instance. Quote
nopants Posted January 8, 2015 Report Posted January 8, 2015 this reminds me, do you add any decoupling to the bh hv rails? I noticed there are no spots on the amplifier board. I have some Russian caps lying around that I can duct tape and paper clip into the mix Quote
spritzer Posted January 9, 2015 Report Posted January 9, 2015 That reminds me too much Single Power so don't do that... No caps on these but then again the PSU is 10mm from the amp boards. Quote
HemiSam Posted January 9, 2015 Report Posted January 9, 2015 Rookie here. Have been lurking and read through this thread and a few others. This amp is waaaaaay sexy. I dont personally have the skill to build one...I'm an oaf with electronics as can be judged on the work I do on my race car...far more mechanically inclined. I want one bad and have a kind and skilled gent building one so I don't kill myself or my e-stats. Tail wagging... HS Quote
nopants Posted January 9, 2015 Report Posted January 9, 2015 That reminds me too much Single Power so don't do that... No caps on these but then again the PSU is 10mm from the amp boards. I'm thinking about making mine a 2 box affair with the kgsshv supply. Maybe I'll use those terminal block spots for caps instead and mount said caps/terminal blocks on a some perfboard Quote
spritzer Posted January 10, 2015 Report Posted January 10, 2015 I wouldn't use the KGSSHV psu as it just doesn't like that load. No mods possible with that PSU board which is why we are slowly working on a new one. 1 Quote
Laowei Posted January 11, 2015 Report Posted January 11, 2015 (edited) Posting a FYI to those new to tubes. It helps SQ to clean the oxidation off of the pins. I use a stainless steel Dremel wheel and automotive Mass Air Flow cleaner (or 99% IPA) with Q tips to finish. Do not follow up with any audio fool stuff like Pro Gold, etc. Most cannot stand the heat and self destruct to a messy gooey crap that is near impossible to clean out of the socket later. Edit: this is for unplated pins like all 6S4As used with the KGST. Edited January 11, 2015 by Laowei 1 Quote
JimL Posted January 12, 2015 Report Posted January 12, 2015 I use Mr. Clean Magic eraser - just shove the pins into it a few times. Also works well for cleaning off cartridge tips for those retrogrades among us who still listen to LPS. 4 Quote
blubliss Posted January 14, 2015 Report Posted January 14, 2015 Anyone have boards for this they want to sell me? Quote
GeorgeP Posted January 14, 2015 Report Posted January 14, 2015 Hey Andy, I have two but likely will only ever need one. Drop me a line. Quote
nopants Posted January 14, 2015 Report Posted January 14, 2015 I have one channel that I can donate, an extra from bay area circuits Quote
meeskees Posted January 18, 2015 Report Posted January 18, 2015 The input of the kgst is very sensitive. I can only use 25% of the volumepot to get deafening sound. Is it possible to attenuate before the volumepot? The pot is a 10k alps (4 gang) Quote
spritzer Posted January 18, 2015 Report Posted January 18, 2015 The gain on the KGST is the same as on all the other 'stat amps we've done. Volume pot impedance doesn't matter so how much voltage are you feeding it? Quote
meeskees Posted January 18, 2015 Report Posted January 18, 2015 The DAC is a Schiit Gungnir.According the specs it is maximum output XLR 4.0V RMS Quote
kevin gilmore Posted January 18, 2015 Author Report Posted January 18, 2015 Which is insanely high, but lots of dac's are doing that these days. You need a 10db balanced pad on the input. Quote
meeskees Posted January 18, 2015 Report Posted January 18, 2015 Thanks, but how can this be done with an XLR input? Quote
kevin gilmore Posted January 18, 2015 Author Report Posted January 18, 2015 buy the neutrik xlr-male to xlr-female adapters and pick your attenuation and use either 3 or 4 resistors depending on whether the dac is really balanced or not. http://www.mouser.com/ProductDetail/Neutrik/NA3FM/?qs=sGAEpiMZZMv0W4pxf2HiV9y0EyfHsAgRI%2fcUCPoRaKI%3d Quote
meeskees Posted January 18, 2015 Report Posted January 18, 2015 Thank you for the reply. I did not see how this adapter works.The DAC is fully balanced. Would it not be easier to solder some resistors at the input connector of the amp? The only problem is I am not sure about the values of these resistors. Quote
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