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Well the SR7XL arrived today and all I can say is thats its bloody massive. It quite literally looks immense and extremely moody, you wouldn't want to pick a fight with it! I'll be linking it up tomorrow after a little tweak. I have spoken to Paul and the internal regs may be here quicker than I expected :eek:. I'll report tomorrow after I've had a couple of hours with it hooked up. Thanks very very much Paul :cool:
Indeed - rather a chunky monkey, is it not? The sonic improvement, even without the reg mods installed yet, should be obvious! :eyebrows:
Marco.
The really maddening thing is that I'm not really gonna get any time to fit the thing until Friday :( I'm solid at work, so I've just got the thing switched on to slowly burn it in, it should have at least 20 hours burn in when I'm ready to install it. I honestly dont think there is that much more apart from the internal regs (for the time being) that I can do to the 1210 apart from some minor tweeks that I have planned and a BIG project that i'm gonna keep quite about :eyebrows: I'll be posting details on some minor tweeks soon!
Looking forward to your report back on the minor tweeks cause some of the major stuf you guys undertake is not for the fainthearted :lol:
Without any vinyl replay myself at the mo :( as I've just sold my base model Timestep for a meatier external psu. I've taken a punt on what Sean from Custom Cables has been thinking about offering up as a DC-3 after hearing good things about his DC-1 and DC-2 external psu's for the Techie. It is in effect an upgrade of this one his DC-2 - http://www.custom-hifi-cables.co.uk/...c-power-supply
Mine will include: 'DC3' PSU - using a 280x230x80mm black case, 500VA transformer, Schottky diode rectification, 4x10,000uF Nichicon KG caps, DC2 regulation board (fully upgraded as far as possible with regards to components used). With locking ring output and a 1.0m shielded and braid-sheathed output cable plus extra locking ring for 1210 chassis b1.5m PowerBlack IEC mains cable
Wont pretend I understand all the spec details lol (someone will and may offer initial comment) but I told him I wanted something pretty good and at a competitive price with good cables etc. £418 including delivery.
Have placed deposit, balance to follow in coming weeks. Will definately report back on findings but I'm pretty excited already :)
Sounds like a good solid base for a PSU Robert, but what is the regulator?
DCSXL pure-silver DC lead, fitted with Jaeger (low-impedance) connector now fitted. Remove a couple of resistors, and a cap, and a few other bits of pieces on the PCB. Its all hooked up, just need to check the voltage of the SR7 (where's that multimeter). Will also be making a special stand for the new PSU over the weekend!
Hi Mark, In addition to previously advised in post #124 above re: regulator. I can quote from one of the emails I've recieved as follows:Quote:
Originally Posted by Reid Malenfant
The basic design is something called a 'Tracking Pre-Regulator', which uses two separate regulators working together (not just in series) to give much better performance than single-reg designs. The TPR design is also used by Les W of Avondale Audio and Teddy Pardo, two other very highly-regarded audio engineers who make their own PSU DIY modules, although the three designs all vary quite a bit in the implementation the basic principles are the same.
The actual part number of the regulators I use is LM1085 - a higher-current version of the standard 1086, which itself is a modern and superior replacement to the common 317 (which is still used by many manufacturers including Naim Audio). The 317 architecture allows for much better performance than the fixed regualator types like the 7805/7812 series of regs - even these low-quality parts are used by many manufacturers on low to mid-end equipment.
I've used a modified version of my DC2 PCB with some better-than-standard capacitors and regulators added, along with the much bigger transformer and capacitor array it'll surpass the standard DC2 by a good margin.
As I say Mark the spec stuf doesn't mean a lot to me but I'm sure it will have more meaning to you and others. I can also add that the guy (Sean) is an absolute pleasure to deal with to say the least and without even hearing the psu he's doing for me (which I'm sure will sound great going by testimonials re: even his entry level psu), I'm truly glad I took a punt. Finally apologies Andrew if I've highjacked the thread - totally not intended :)
Tracking regulators generally refer to one in the positive rail & a second one in a negative rail below ground (as an example +/- 15V & ground) where one is slaved to the other & delivers the opposite of the first one.
The 317 (337 is the negative rail version) is definately better than just about any fixed voltage regulator I can think of ;) Performance can be improved with decent circuit design.
I don't know the regulators you are refering to, obviously newer types. You can't beat discrete regulators though, but they do cost some :rolleyes:
Sounds half decent & I hope it does to :D
Likewise, apologies to Andrew for the brief side step :)
Thanks for the knowledge Mark, I feel quietly confident that this is gonna sound lovely after my base Timestep - It sounds like quality at £400. - Right ! I'm moving over now til i've paid the balance and its made up and arrived :).Quote:
Originally Posted by Reid Malenfant
Just to get back on track lads I thought I'd mail a quick pic of the new PSU for people who have never seen Paul's work before. As you can see its huge!