SR45 amplifier
- Thread starter debk
- Start date
fullheadofnothing
Moderator
PJ came over to the island this week to pick up a bunch of parts. I believe they were mostly for power supply testing (big resistors to simulate the load, etc.), but output iron and a sizeable chunk of wire was picked up as well. It is my understanding that the power supply is being built on the chassis rather than breadboarded, so the amp must be starting to look like an amp!
Grainger49
New member
fullheadofnothing said:
I hadn't realized before that PJ wasn't local.
Paul Joppa
Moderator
Semi-local - door-to-door is about 90 minutes, longer in the summer when the ferries are full of tourists.
Josh's description is accurate. I need to put the fully loaded PSU output on the scope to know which regulator chips I can use for the filaments, and to know how much current I can take out without overheating the PT-7. Then I can finish the second large PC board, which has all the heat sinks.
I had hoped to do all that without using the full chassis, but there are so many wires with high voltage or current it just looked like a disaster waiting to happen, so I'm doing it the slow but clean way. Not really my natural style; there's a reason Doc doesn't usually let me build stuff by myself :^)
Josh's description is accurate. I need to put the fully loaded PSU output on the scope to know which regulator chips I can use for the filaments, and to know how much current I can take out without overheating the PT-7. Then I can finish the second large PC board, which has all the heat sinks.
I had hoped to do all that without using the full chassis, but there are so many wires with high voltage or current it just looked like a disaster waiting to happen, so I'm doing it the slow but clean way. Not really my natural style; there's a reason Doc doesn't usually let me build stuff by myself :^)
Paul Joppa
Moderator
We have not talked strategy at all.dth31 said:
But I expect it will follow some non-traditional path, like crowdfunding or limited production run. Like the DAC, it's not cheap and will appeal to a smaller audience than our more mainstream products. I can see a semi-kit also - the main PC board will be pretty large (for Bottlehead) and has an awful lot of components on it, which will make debugging through the forum a challenge. Dynaco did this back in the day.
Paul Joppa
Moderator
Back-ordered parts (from March or so!) finally came in a couple weeks ago.
Yeah, it's going slow - I keep getting distracted with other designs, most of which have not yet come to the point where we want to say anything about them.
Yeah, it's going slow - I keep getting distracted with other designs, most of which have not yet come to the point where we want to say anything about them.
We will be shooting manuals for two to three new products this month alone.
PJ's commitment to a strong, reliable implementation of the SR-45 is unwavering, and since the scope of this project is beyond any kit offerings we currently have, there is no real prior precedent for how long such a project will take to complete.
-PB
PJ's commitment to a strong, reliable implementation of the SR-45 is unwavering, and since the scope of this project is beyond any kit offerings we currently have, there is no real prior precedent for how long such a project will take to complete.
-PB
That's the boss's job, not minemcandmar said:You let the cat out of the bag there
Paul Joppa
Moderator
Thanks for the ping, Aaron!
Seductor has been taking up a lot of my time, but progress is being made. More later.
Seductor has been taking up a lot of my time, but progress is being made. More later.
Paul Joppa
Moderator
Other projects - mostly getting my late mother's estate through probate right now. Long story, but coming to a close finally.
There's a lot of developments going on at Bottlehead, and the SR amps are related to those developments, so they are not orphans even if it seems like it right now.
There's a lot of developments going on at Bottlehead, and the SR amps are related to those developments, so they are not orphans even if it seems like it right now.
