Guest Posted December 31, 2015 Posted December 31, 2015 (edited) @@mwhouston, this one has taken more than 1:20 to put together, just ask @Awty Have also named it. Not far off now, just some DC offset tiny wires and chassis connection to Earth, RCA and Speaker binding posts. Set both amps bias, then ab/use. Holton Precision Audio make really lovely kits this is no acception.Meet Mr. Muscle , with the intention of driving loads others hate BTW, this is the fist amp kit I have ever done Edited December 31, 2015 by Guest
mwhouston Posted December 31, 2015 Posted December 31, 2015 (edited) Here is the HT and DC filament smoothing and storage cct. brd. This one was done free-hand no PCB. Choke will sit off the brd. and limiting resistors added when amp is complete. This is for a phono tube preamp. Layout may look odd. It has to fit in a 1U enclosure (about an inch high). Edited December 31, 2015 by mwhouston
mwhouston Posted December 31, 2015 Posted December 31, 2015 @@mwhouston, this one has taken more than 1:20 to put together, just ask @Awty Have also named it. Not far off now, just some DC offset tiny wires and chassis connection to Earth, RCA and Speaker binding posts. Set both amps bias, then ab/use. IMG_1740.JPG Holton Precision Audio make really lovely kits this is no acception.IMG_1737.JPGMeet Mr. Muscle , with the intention of driving loads others hate BTW, this is the fist amp kit I have ever done Good luck.
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) Quick Upgrade to Jantzen Superior 800v , PSE144 compression driver series capacitor. Nice to have a day on the soldering iron, inside the lounge out of the heat of today. Edited December 31, 2015 by Guest
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) Good luck. Thanks Mark, all should be Ok, Anthony Holton is going to fire it up after a wire check, bread and butter for him. Toooo expensive to watch go up in smoke although I actually understand "how it works" and confident it is quite Ok, with my own twist on some of the wiring. My new phono pre is looking nice it has a class A pre amp to run line into the miniDSP, clean class A to the digital processor, nice. Edited December 31, 2015 by Guest
awty Posted December 31, 2015 Posted December 31, 2015 @@mwhouston, this one has taken more than 1:20 to put together, just ask @Awty Have also named it. Not far off now, just some DC offset tiny wires and chassis connection to Earth, RCA and Speaker binding posts. Set both amps bias, then ab/use. IMG_1740.JPG Holton Precision Audio make really lovely kits this is no acception.IMG_1737.JPGMeet Mr. Muscle , with the intention of driving loads others hate BTW, this is the fist amp kit I have ever done Ya can no rush these things man. Looks great so far. Whats the red & white wire for? How have you configured the ground wires?
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) Ya can no rush these things man. Looks great so far. Whats the red & white wire for? How have you configured the ground wires? The little red and white are the "trigger on" Earthing, try to keep away from the dreaded hum from loops so, wired in 2.5mm building cable, very low resistance/impedance, but a bugger to work with. Follow the earth from the amp module speaker negative, to the rectifier filter ground/earth/common point (that was hard) then onto the chassis (series connected). Power controller straight to the chassis (parallel). Chassis to IEC plug. Tried to keep it away from "noisy places" like the transformers and close as possible to chassis, under things. There is also a little Linear PS on the controller, with regulating switching transistor, so that earth went alone to the chassis and as short as possible. fingers crossed no hum. Nice things like teflon 75ohm mil spec silver input coax, pure copper RCA's (in the mail) "welcome to the Team Mr Muscle" hehe It may not look very big but, it is quite heavy in a large full sized case, not something to drop on your toe. As you can tell, I am actually quite pleased,, it's worth over $2K so far and "should" punch up to 400 clean single ended Class AB watts per channel into a pair of 4 ohm (500w 20mm XLinear) 15' subs with ease. HAPPY NEW YEAR Edited December 31, 2015 by Guest
mwhouston Posted December 31, 2015 Posted December 31, 2015 How many watts. At a guess, judging by the number FETs, 200?
awty Posted December 31, 2015 Posted December 31, 2015 @@125dBmonster is there any issue with magnetic flux having the trannies so close together?
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) 200 Watts RMS continuous sine wave into 8 Ω350 Watts RMS continuous sine wave into 4 ΩThe HPA-nxV300 R2 Signature is 2 Ω StableBiased into Class A/BPower Bandwidth 3.5hz to 300khz -3dBSlew Rate = 60v /uSecDampening Factor At 100hz 8Ω = 800RCA Single ended Input impedance 33kΩSingle Ended Input Gain = 30.6dBSNR -105dBTHD-N = 0.005% @ 10 watts 8 OhmsRecommended Linear Voltage Supply +-70 volts DCPSU Power Transformer secondary windings 50vac (400VA - 500VA) Morning @@mwhouston, yes around that into 8 ohms, This will mostly be used to drive larger speakers like 18's and subs and the ones I generally buy are 4 ohms or I get brutal and start wiring for 2 ohms. The transformers have been upgraded from a suggested 500 to 625va. If this one run's out of stick for my requirements I go to the 1200w AB Class mono and make a pair, just overkill it which is my normal character. like driving a drawing pin with a sledge hammer Edited December 31, 2015 by Guest
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) @@125dBmonster is there any issue with magnetic flux having the trannies so close together? G'day Awty. Not sure, what does that do ? have me worried now. Anthony actually was surprised with the nice neat layout, said overrating the transformers was a good idea for my application and "should" be quite impressive. The 6 channel I have is running a pair of 100w channels into a pair of Eminence 18's and does that quite Ok. Edited December 31, 2015 by Guest
mwhouston Posted December 31, 2015 Posted December 31, 2015 200 Watts RMS continuous sine wave into 8 Ω 350 Watts RMS continuous sine wave into 4 Ω The HPA-nxV300 R2 Signature is 2 Ω Stable Biased into Class A/B Power Bandwidth 3.5hz to 300khz -3dB Slew Rate = 60v /uSec Dampening Factor At 100hz 8Ω = 800 RCA Single ended Input impedance 33kΩ Single Ended Input Gain = 30.6dB SNR -105dB THD-N = 0.005% @ 10 watts 8 Ohms Recommended Linear Voltage Supply +-70 volts DC PSU Power Transformer secondary windings 50vac (400VA - 500VA) Morning @@mwhouston, yes around that into 8 ohms, This will mostly be used to drive larger speakers like 18's and subs and the ones I generally buy are 4 ohms or I get brutal and start wiring for 2 ohms. The transformers have been upgraded from a suggested 500 to 625va. If this one run's out of stick for my requirements I go to the 1200w AB Class mono and make a pair, just overkill it which is my normal character. like driving a drawing pin with a sledge hammer Yes my guess at 200W. Generally each power FET will handle about 50W. 4 FETs => 200W. After building 500W, 250W (only one I still have) and 180W class Ds and hearing how nice raw power can sound, I would agree with your one direction.
mwhouston Posted December 31, 2015 Posted December 31, 2015 (edited) G'day Awty. Not sure, what does that do ? have me worried now. Anthony actually was surprised with the nice neat layout, said overrating the transformers was a good idea for my application and "should" be quite impressive. The 6 channel I have is running a pair of 100w channels into a pair of Eminence 18's and does that quite Ok. Toriods don't "leak" a lot of flux. I wouldn't be worried. And at the power tranni level it is little concern. Edited December 31, 2015 by mwhouston
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) Yes my guess at 200W. Generally each power FET will handle about 50W. 4 FETs => 200W. After building 500W, 250W (only one I still have) and 180W class Ds and hearing how nice raw power can sound, I would agree with your one direction. Discovered quite a long time ago that overpowering creates a very detailed, clean, open and dynamic sound, even at low volumes. Sorry I'm just a power mad nut case, love my 10/50Hz, throw back from my car audio days and the music I like. FEEL THE POWER Edited December 31, 2015 by Guest
Guest Posted December 31, 2015 Posted December 31, 2015 (edited) The battery rig is really cool and impresses the socks off everyone. I love it to pieces Edited December 31, 2015 by Guest
Equaliser Posted January 1, 2016 Posted January 1, 2016 That's some impressive array of battery power supply you got there. 1
mwhouston Posted January 1, 2016 Posted January 1, 2016 That's some impressive array of battery power supply you got there. The idea was to have a dead quiet PS. Battery changes are properly beyond 100hrs. Also the MM and MC stages have their own supplies. No only that but put it under arm and take it to a mates place and not have to worry about yet another mains outlet. Mimic works the same principals.
Newman Posted January 1, 2016 Posted January 1, 2016 Discovered quite a long time ago that overpowering creates a very detailed, clean, open and dynamic sound, even at low volumes. Sorry I'm just a power mad nut case, love my 10/50Hz, throw back from my car audio days and the music I like. post-149865-0-89458300-1439181242.jpg FEEL THE POWER Who would have seen this coming, with a moniker such as yours? 1
mwhouston Posted January 1, 2016 Posted January 1, 2016 (edited) Im an avid Stereophile reader. In some speaker reports the review claims the spekaers never hit thier stride until her hooked up 400W amps. Electrocompanient comes to mind. With some speakers, Magico and Wilsons included, current rules. Edited January 1, 2016 by mwhouston
Guest Posted January 1, 2016 Posted January 1, 2016 That's some impressive array of battery power supply you got there. One benefit of battery supply means absolutely no noise physical/induced or otherwise. Something I am yet to see/hear from any mains powered set up. Can sit an ear on a 1200w Amp and hear nothing and I mean nothing 0dB. That in itself was a big achievement, that no one acknowledges here. Integrates with the TT quite well.
mwhouston Posted January 1, 2016 Posted January 1, 2016 I've seen some images of your battery PS. Impressive.
Newman Posted January 1, 2016 Posted January 1, 2016 One benefit of battery supply means absolutely no noise physical/induced or otherwise. Something I am yet to see/hear from any mains powered set up. Can sit an ear on a 1200w Amp and hear nothing and I mean nothing 0dB. That in itself was a big achievement, that no one acknowledges here. Integrates with the TT quite well. Ask someone else to try their ear. For some inexplicable reason, my confidence in your acuity has eroded slightly in recent posts....
Guest Posted January 1, 2016 Posted January 1, 2016 Ask someone else to try their ear. For some inexplicable reason, my confidence in your acuity has eroded slightly in recent posts.... Is all Ok, even on longer drives (30 mins+) I wear ear muffs and hate loud work places or noisy tools, if you are ever looking for me on a work-site I'm the one with the biggest ear muffs. Sadly I "audiophile" in isolation here in Burnie, so it is unlikely anyone will back any of my claims, that's Ok, I have the forum and a camera. Generally listen to below 80dB so as not to wake my sleeping Family or annoy my neighbors, but sometimes up goes the wick for a burst.
Guest Posted January 5, 2016 Posted January 5, 2016 As I was digging around for bits for the big boombox I came across some other stuff. Might put this In that Should fit with enough room for a little powerpack and some drivers as well
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