luvmusic Posted September 30, 2015 Posted September 30, 2015 (edited) High Voltage Shunt Regulator for Valve Preamp Hello , I'd like to share some photos with your guys for the shunt regulator I recently build. This is based on Salas SSHV2: http://www.diyaudio.com/forums/power-supplies/134801-simplistic-mosfet-hv-shunt-regs-207.html I build this to replace the valve series regulators in my DIY preamp. The result is huge improvement to my ears. Edited September 30, 2015 by luvmusic 6
baMarek Posted September 30, 2015 Posted September 30, 2015 This looks very good. Does Salas still sell them or they were always meant to be a group buy? Sent from my GT-I9192 using Tapatalk
luvmusic Posted September 30, 2015 Posted September 30, 2015 This looks very good. Does Salas still sell them or they were always meant to be a group buy? Sent from my GT-I9192 using Tapatalk Thanks for comment. Not sure Salas still sells them but it seems group buy is still available: http://www.diyaudio.com/forums/group-buys/206033-gb-salas-sshv2-regulator-65.html 1
Guest Posted September 30, 2015 Posted September 30, 2015 as per DVP's suggestion some time back, the LED lights up the cigar IMG_5746.JPG IMG_5747.JPG Haha noice
mwhouston Posted October 1, 2015 Posted October 1, 2015 If subjective banter offends avoid this post. I posted, a few days back, my new super expensive DIY MC stage inspired by Boozhound Labs MC kit. This one featured over $800 of Audio Note caps. I was very pleased with the sound right off the bat and was particularly impressed with the dynamics and detail of sound. I was not prepared for how well this stage would sound 12 hours later. I believe in component burn it and especially with caps and even more especially when they are big expensive and exotic audio caps. The whole sound of my system, with this new MC stage in place, has lifted to a level I have never heard before. I should have known something great was coming when I heard how good the original Boozhound MC kit was and with the addition of a high-end caps, as the only caps in the audio path, it had to improve. I'm not going to talk of bass and depth of field etc. but just to say the overall dynamics of my vinyl setup, which includes the new tube MM stage, is off the planet. Yes a $AU1k+ MC stage which runs on batteries, should sound good and thankfully it is a lot better than good. I'm going to build another using copper or tin AN caps. Cheaper than the AU$427 silver puppies. http://retro-thermionic.blogspot.com.au/2015/09/tengu-extreme-mc-phono-stage.html
Batty Posted October 1, 2015 Posted October 1, 2015 Boozehound Pre Pre is going into it's enclosure today.
Guest Muon Posted October 1, 2015 Posted October 1, 2015 (edited) Hay, Mark....I live for subjective banter Nice read Don't forget to consider the Duelund RS or Jupiter Copper Foils if in the same price bracket Edit: Steve (Batty) you don't have a @mention under ya' name :blink: Nice enclosure huh? that is one of my failing.... by not doing a good case. Edited October 1, 2015 by ortofun
Guest Posted October 1, 2015 Posted October 1, 2015 Steve (Batty) you don't have a @mention under ya' name :blink: .
Guest Muon Posted October 1, 2015 Posted October 1, 2015 Doesn't show for me, it seems to be the last post when I'm posting has it missing....must be me and my browser. Hay, sounds like a song "Me! ...and my browww-ser" OK, I'll be off
Batty Posted October 1, 2015 Posted October 1, 2015 I don't really care about @Mention whatever that may be.
Guest Posted October 1, 2015 Posted October 1, 2015 I don't really care about @Mention whatever that may be. That-> @@Batty
betocool Posted October 1, 2015 Posted October 1, 2015 Finished! The Sony TA-2650 mod is over. Working as expected. Just need to find a spot where I'll put it around my desk. Sound is beautiful, vintage Sony. The headphones connected through resistors directly to the output, while that does not seem to satisfy my Grados, it works wonders on a 600 DT770. Some connectors are new, some are the same, the metal cover as well as the front and the back (everything... really) was sprayed and sanded wet and sprayed again with matt black. Very susceptible to scratches, but hey, it was supposed to be a el-cheapo job after all. I'm still not 100% there with the volume pot (bottom of a honey jar), but I'll let it be for the time being. The front. The back. The End. 5
Batty Posted October 1, 2015 Posted October 1, 2015 (edited) Not the best of cases, but it was fun, sorry about the poor Q pics too. Front. Rear. The DC socket on the rear is for an external supply, there are 2 9 volt Lithium batteries internally. The switch on the front switches between the two, so with no external supply the up position is off. EDIT: I guess this is the one you really want ..... topless! Edited October 1, 2015 by Batty 4
mwhouston Posted October 2, 2015 Posted October 2, 2015 I am going to build another extreme MC stage but this time use the AN tin foil caps. I'm wondering if anyone has ever used them and can make a comment about them before I order. Here is the MC stage I built using the AN Silver foils. http://retro-thermionic.blogspot.com.au/
mwhouston Posted October 2, 2015 Posted October 2, 2015 What are the value of the caps? Value is 0.1uf.
Guest Peter the Greek Posted October 2, 2015 Posted October 2, 2015 One of many new panels in WIP. This one goes next to a surround speaker.
Guest Posted October 2, 2015 Posted October 2, 2015 (edited) Building a sound lounge in the before plaster stage after wiring. Trying to isolate the ceiling from the above floor in this case. Steel channels still ring a bit, but when the plaster, 13mm, is adhered to it they should be ok. Will use a continuous run of plaster glue along the channels and glue over all the screws to try and isolate them from the timber. Not sure if an air gap is better than a 25mm thin layer of insulation between the plaster and sound check bats. Cheers Edited October 2, 2015 by Guest
Guest Peter the Greek Posted October 2, 2015 Posted October 2, 2015 Building a sound lounge in the before plaster stage after wiring. Trying to isolate the ceiling from the above floor in this case. Steel channels still ring a bit, but when the plaster, 13mm, is adhered to it they should be ok. Will use a continuous run of plaster glue along the channels and glue over all the screws to try and isolate them from the timber. Not sure if an air gap is better than a 25mm thin layer of insulation between the plaster and sound check bats. Cheers Dont worry about the air gap, the insulation is enough to stop the cavity ringing like a drum. .....sadly there is not much point to what you have done without isolating clips. Bass will flank straight through those blue pads....too late to change?
Guest Posted October 2, 2015 Posted October 2, 2015 (edited) G'day @@Peter the Greek The blue pads are of a nice waterproof "foam" salvaged from an old boat project, seemed appropriate. The stuff acts like sorbothane at 20mm thick, likes deadening blows of a claw hammer. Also saved me more than a grand for my 9 x 4.2m listening area, in isolation clips I would rather put into audio hardware.. Perforated plaster may also help, but hey, I like listening to the Guy's in the know. (edit) everything I am reading suggests filling air voids. Thanks Edited October 2, 2015 by Guest
PonyTail Posted October 2, 2015 Posted October 2, 2015 Will use a continuous run of plaster glue along the channels and glue over all the screws to try and isolate them from the timber. I'm not sure but won't gluing over the screws connect them and the channel to the timber? I would have thought rubber grommets in the channel would have provided a small amount of isolation.
Owen Y Posted October 2, 2015 Posted October 2, 2015 High Voltage Shunt Regulator for Valve Preamp Hello , I'd like to share some photos with your guys for the shunt regulator I recently build. This is based on Salas SSHV2: http://www.diyaudio.com/forums/power-supplies/134801-simplistic-mosfet-hv-shunt-regs-207.html I build this to replace the valve series regulators in my DIY preamp. The result is huge improvement to my ears. Hi luvmusic, That looks like a beaut build. What improvement do you hear & what did you have previously, for your HT PSU? This isn't intended to create offence & is just my humble view, but having built a few valve preamps & amps, I would always keep SS devices away from the valve signal cct (for sonic reasons). As we know, a valve's quiescent/standing current flows from PSU through the anode to Gnd through the valve & the incoming signal modulates that to create the amplified output. So the HT anode supply is 'in the signal cct'. The Reg HT PSU idea is to rigidly hold the plate current 'constant' using transistors. Technically, this should improve bandwidth & linearity. Personally, one of the most 'musical' improvements I have experienced valve amps, is to lower the impedance of the HT supply, eg. by using chokes instead resistor droppers in your plate decoupling supply - lowering impedance increases 'dynamic freedom' & headroom of the cct. Sounds more like music.. 'Iron' sounds better than 'sand' to my ear. YMMV of course, so am interested in what you hear & what the Reg supply has replaced. A Linestage is a v simple device, just a single valve amplif stage & a vol control/selector sw. - so it should sound great, whichever. Cheers, Owen Dark Lantern blog - http://darklanternforowen.wordpress.com/
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