spritzer

It's an EL54 so similar to the 34 but not the same. Might work in the ES-1 but the BH would have to be modified.

I doubt it will surpass the original BH but it could. The 6S4 is a good tube and well suited for this role but it hasn't got the power of a triode connected EL34.

They really know how to roll...

When you don't know what the benefits really are it's hard to sell them as improvements. The Valve Art tubes that you shipped with my amp started to discolor early on but my main Mullard XF2 quad doesn't show any signs of wear even after 2 years of much use. The delay helps the new production stuff a lot. It's true that the case isn't too sturdy but it doesn't ring too much. It's still a lot better then the horrible Hifi2000 cases as I used two for my KGSS. They ring like crazy and required a lot of damping to sound good. I still love the silver look of my BH and it will match the silver SR-007A perfectly...

What they don't know, won't hurt them.

I meant it sounds great as there are some updates going on. I'm not a big fan of the "lets make it prettier and charge more" way.

In Icelandic: Eg aeldi a barn Guds Stupid forum software doesn't allow the Icelandic characters I had to dumb it down.

That's only on ebay as they are pushing Paypal.

Who needs a XONO when I have my very own modular Stax phonostage in the SRA-3S...??

Nelson Pass is indeed one of the greats. A skilled designer that is willing to try new things, doesn't hide behind some marketing BS and shares his designs when he's done with them.

I haven't had many transactions there yet but all have been good so far, both buying and selling.

That's not what I meant but comparison in build quality with Pass Labs is a great honor, something Justin fully deserves. Sounds great. I've never been completely happy with the sound of the stock KGSS I built though it has many redeeming qualities. I take it will be built on a single PCB with the everything incorporated such as the Aristaeus and the KGBH SE?

Very nice Justin. Anodize them black, slap on a silver front panel and it could be mistaken for a Pass Labs amp. Are you going to do any work on the KGSS circuit besides altering the layout, new PSU etc.?

Welcome to the Stax mafia. The system looks great but let the upgrade madness commence...

I never got that cool shirt with my set...

Cool! Their worth is hard to fathom since we nothing about them but 2-400$ could be a good guess but it really depends on the sample. There is no way to easily fix them and no source for pads so you are shit out of luck if something breaks.

Absolutely correct. I was looking at the minimum standoff voltage in the spec sheet.

Nope but I want one!! Badly! They are one of Jecklins designs and we know next to nothing about them. Totally incompatible with the Stax standard so you need to use the original step up energizer.

Here is the SRD-7 Mk2 schematic with the bias supplies on the bottom. It's pretty straight forward with a 150k resistor on the input and then the z1100 bidirectional zener but you can use two 81v units instead facing each other. The rest is easy and it doesn't take long to build on a perfboard.

Ouch!!! I'm going to go and hug my SR-Omega now...

Keep me posted because if an upgraded PSU does improve the amp a great deal it will save me huge amounts of money...

What I'd like to know is how an upgrade can take up to two years and why do people put up with this crap? I'd like to see some measurements on the ES-1 such as output impedance, slew rate etc. as those will tell us a whole lot more then the voltage swing alone. I do have an itch to throw together a second BH psu and see how the amp responds to dual mono supplies... \

The truth is that the HE90 doesn't like direct coupled, relatively neutral and clean amps. They need something to mess up the sound, be it the steaming pile of crap that is the HEV90 or some caps in the signal path, to gloss over the biggest faults. This why an Aristaeus is on my to buy/build list but Marc's talk about the souped up KGSS has made me want to take a second look at the BH and see what can be done for the PSU. I think the BH deserves a PSU that is at least 5 times as big as the amp section. Can anybody say giant film caps...

A lot of current into 4ohm is very different from 100v into 2000ohm and more so it will depend on the amp. It should be find at low volume though before the amp runs out of voltage and starts to misbehave.

I'd rather say I'm recommending them... not pimping them... My cables use a specially drawn silver that was made for a friend of mine and I got some of his stash after he was done experimenting. The other limited material is the center tube that the whole cable is built on. I found a stash of it but haven't been able to find a similar material to buy anywhere that shares the same flexibility but is yet so sturdy and non resonant. It's a bit like the Indra but I have enough for all my cable needs in the future. The basic design is thin conductors, spiraled around the center tube and then damped by two separate layers of material. They are a bitch to fabricate with a lot of time going into each meter and are fragile where the connectors meet the cable but I've mostly solved that issue now. If you think the Ridge Street stuff is expensive then this would be in a whole other league.