spritzer

I could only find one crappy picture of the top of the BHSE PCB but it looks like the offset (gain) pots are towards the front of the chassis and the balance pots towards the back. To adjust the balance you put the probes of the multimeter into the + and - output of each channel and adjust for 0VDC. The gain is adjusted with one probe in the + output on each channel and the other probe connected to ground on the amp, adjust for 0VDC. Please wait for Justin to verify this though before doing anything...

You really should bias the tubes. The balance pot isn't a big deal with matched pairs but reducing the offset is a must. So Justin, which pot is which?

I just checked and it's the SRA-6S schematic which I have, dated FEB 1961. It's a neat design which can also function as a preamp.

I haven't received my 404LE yet so I simply don't know.

The 6CA7 isn't the same tube as a EL34, at least the difference was large enough so they could claim it to be their own and not pay any royalties as a EL34. I'm afraid all the tuberolling in the world won't help you here. What you are hearing is the core sound of the cans though a highly transparent amp and thats why I never recommend a BH (or KGSS, 717 etc.) for use with the HE90. I did get better results with the HE60 though but they will never be bass monsters, more in line with the 4070 and SR-X Mk3 Pro.

Thanks guys. It was a crazy day to say the least, 14 hours of non-stop running plus a couple of hours to clean up. Just making sure the store was fully stocked was a nightmare since we sold a lot more breads then I thought we would, I focused mostly on pastries, cakes and the like, and I can't simply make more breads appear by snapping my fingers. Even though there are tricks to make them develop faster (warmer water, more yeast, adding enzymes and maltose etc.) they still need about 60 minutes in the proofer and another 30 in the oven. Let's just say I'm glad this is over...

Looks like the SR-404 earpads have been released...

I think I even have the schematic for the SRA-7S somewhere around here but it could also be the SRA-6S... I've had a few of those over the years and even modified them for Pro bias.

Time to update the old Popcorn hour then. Some extra network bandwidth will be nice to have over the old unit.

Hehe...

I don't know of any stock pads that will fit but I was once going to mount ESP950 drivers in a HE90 like shell and use HE90 earpads. You can't modify the stock bias supply to do that but you can build a small adjustable one and mount it to the sidewall of the amp or something like that. Run it off the main transformer and B+

I'll try to take some but it may be excessively crazy. We'll see... I'll Fedex it over in the morning...

Woot I have a new boss!! Tell me about it. \

The pads on the ESP950 suck balls but the cans have some serious promise. You need a new amp though...

The pixies are mine... all mine!!!!

It was just me being silly. I usually say tube amps are safe if you don't try to lick them.

Thanks guys. Nobody knows the exact day the ovens were fired up for the first time but it was late August/early September 1834. A German baker was brought in to run the bakery (and it's named after him, Bernh

Happy Birthday!!

Marc's out of luck then since I've already done so... Yup, I bought the one Philodox had.

Ouch but very cool at the same time.

Check on dem der internetz...

Licking does help...

Well that makes it all better.

Hmmmm wasn't there a B22 once that you blew up? I would start off at the crafts store with some felt or perhaps cotton.

They will become much brighter if you remove the damping (if I remeber correctly... ) so try some different types of materials plus a reflex dot instead of the stock wool. Steve did an excellent job with the Donuts so perhaps enlist him for this?