Hi AJT,
You couldn't have stored it in a safer place! What do we do once the manufacture and sale of larger power light bulbs has been halted?
Hi LKA,
A K200? I'll have to look around and find out about it. It appears as though it is using the NJW type devices, so that catches my interest right away.
-Chris
You couldn't have stored it in a safer place! What do we do once the manufacture and sale of larger power light bulbs has been halted?
Hi LKA,
A K200? I'll have to look around and find out about it. It appears as though it is using the NJW type devices, so that catches my interest right away.
-Chris
Prototype has been built (green, pcb v2.0), it works well, it's stable. White pcb is an improved version (I hope). Open loop thd is 0.05% (1k, 50W, 8ohm), with HEC 0.005%.
Attachments
In the US they will continue to sell decorator legacy light bulbs. That would include clear globes and special shaped filaments or globes.
Hi Kevin,
But doesn't that exclude the higher wattage lamps needed to allow a reasonable amount of energy when you have an amplifier ? I did read somewhere that appliance lamps (25 w) and similar will continue to be legal. They wanted to eliminate the 60 watt and up sizes. The floodlight world would be affected with this as LED lamps are far more costly than the garden variety floodlight.
-Chris
But doesn't that exclude the higher wattage lamps needed to allow a reasonable amount of energy when you have an amplifier ? I did read somewhere that appliance lamps (25 w) and similar will continue to be legal. They wanted to eliminate the 60 watt and up sizes. The floodlight world would be affected with this as LED lamps are far more costly than the garden variety floodlight.
-Chris
Chris,
Incandescent decorator bulbs are still listed at the orange big-box store at up to 100 watts. But the globe shape or base might not be the most common types.
But I see more LED bulbs made to look like filament bulbs, so the old ones may be on the way out.
Incandescent decorator bulbs are still listed at the orange big-box store at up to 100 watts. But the globe shape or base might not be the most common types.
But I see more LED bulbs made to look like filament bulbs, so the old ones may be on the way out.
Beautiful , LKA !!
I like it when a plan works out.
(below 1-3) The new slewmaster V3 output stage with
a (leach) "spooky" amp running it.
V2 was real good (with a big extrusion). V3 will do well on a 3U or 5U.
38C inside , 45C outside (Hot here ! 35C+ ....
Output devices "spread out" really gets that heat dissipated. Under 1C/ or
1mv bias difference on any of the 10 outputs.
I like how the thermal math worked out nearly exact. The .4C/W HeatsinkUSA
rating came out to a 18C rise. With 45W total idle - I'm at exactly 38C.
OS
I like it when a plan works out.
(below 1-3) The new slewmaster V3 output stage with
a (leach) "spooky" amp running it.
V2 was real good (with a big extrusion). V3 will do well on a 3U or 5U.
38C inside , 45C outside (Hot here ! 35C+ ....
Output devices "spread out" really gets that heat dissipated. Under 1C/ or
1mv bias difference on any of the 10 outputs.
I like how the thermal math worked out nearly exact. The .4C/W HeatsinkUSA
rating came out to a 18C rise. With 45W total idle - I'm at exactly 38C.
OS
Attachments
This is a schematic of K200, actually is slightly modified.
P2 is 2K, KSC3503/KSA1381 are replaced by 2SC3502/2SA1380
P2 is 2K, KSC3503/KSA1381 are replaced by 2SC3502/2SA1380
Hi LKA,
That is really nice work! I think you have our attention, and beginning your own thread on this would be a great help. It will keep the information together in one place for your amplifier.
-Chris
That is really nice work! I think you have our attention, and beginning your own thread on this would be a great help. It will keep the information together in one place for your amplifier.
-Chris
Forum thread - I tried twice now (in my country), no one was much interested. First of all, I want to finish the whole amp and do some listening tests, then I'll see.
Hi LKA,
If you want to wait, that's fine. But if you look at most other threads, they chart the development from concept to final working design. The community is very helpful here. You should give them a chance. Don't be put off by a couple of folks who like to think they know everything, just ignore those people.
A thread is no charge, free. You are not going to be out anything for doing this. Some of the best help in the world hangs out here occasionally. They often will give you great advice just because they are nice people.
-Chris
If you want to wait, that's fine. But if you look at most other threads, they chart the development from concept to final working design. The community is very helpful here. You should give them a chance. Don't be put off by a couple of folks who like to think they know everything, just ignore those people.
A thread is no charge, free. You are not going to be out anything for doing this. Some of the best help in the world hangs out here occasionally. They often will give you great advice just because they are nice people.
-Chris
