Though I would show my build, with exposed valves on the top of the case.
Using heatsinks I had in the spares draw, the heater regulator will be bolted to the underside of the top panel to act as heatsink.
The transformer isn't exactly to spec, again it is to hand, so there is a bridge rectifier fitted for the heater supply.
So all components fitted to the 'back' apart from valve bases, fets and relays, plus the heater reg once moved.
The case was chosen to not be too bulky, so it is a nice snug fit.
Had to figure out how to connect the input sockets and MM/MC switch with short wires, so ended up with extended wires from the transformer so the base could be removed to give access.
Rear view.
Lastly in situ in use.
Using heatsinks I had in the spares draw, the heater regulator will be bolted to the underside of the top panel to act as heatsink.
The transformer isn't exactly to spec, again it is to hand, so there is a bridge rectifier fitted for the heater supply.
So all components fitted to the 'back' apart from valve bases, fets and relays, plus the heater reg once moved.
The case was chosen to not be too bulky, so it is a nice snug fit.
Had to figure out how to connect the input sockets and MM/MC switch with short wires, so ended up with extended wires from the transformer so the base could be removed to give access.
Rear view.
Lastly in situ in use.
After being on virtually all day the case does become evenly warm all around.
I think I will drill some ventilation holes top and bottom to keep things cooler.
I think I will drill some ventilation holes top and bottom to keep things cooler.
Though I would show my build, with exposed valves on the top of the case.
Using heatsinks I had in the spares draw, the heater regulator will be bolted to the underside of the top panel to act as heatsink.
The transformer isn't exactly to spec, again it is to hand, so there is a bridge rectifier fitted for the heater supply.
So all components fitted to the 'back' apart from valve bases, fets and relays, plus the heater reg once moved.
Nice! What case is that?
The case was chosen to not be too bulky, so it is a nice snug fit.
Had to figure out how to connect the input sockets and MM/MC switch with short wires, so ended up with extended wires from the transformer so the base could be removed to give access.
Rear view.
Lastly in situ in use.
Had to search for your question in the middle of the post.
Case is WA77 All aluminum amplifier chassis / Preamplifier case / AMP Enclosure /DIY box (215 *70*272mm)|Amplifier| - AliExpress
Case is WA77 All aluminum amplifier chassis / Preamplifier case / AMP Enclosure /DIY box (215 *70*272mm)|Amplifier| - AliExpress
It seems as the pcp have screem print on both sides,is there a side that is top and bottom.. or is just to pick one side.
Is one side mirror of the other?
Is one side mirror of the other?
One says top, one says bottom
For exposed valves, populate the bottom.
For enclosed valves, everything goes on top
JFET matching is now a possibility
I'm absolutely buzzing
I have 2 matched JFETs for my Bigbottle.
Fantastic stuff
I'm absolutely buzzing
I have 2 matched JFETs for my Bigbottle.
Fantastic stuff
My BB3 board arrived back after being fettled (big thank you to Alan) so I fitted it back into it's temporary case and wired it up. Now in place in the test system and sounding pretty good. For those like me using ECC88's with 6.3v heaters it's worth fitting a taller heatsink on the regulator. Hopefully I will get a longer listen tomorrow. A couple of pics.
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I am embarrassed to say that was it😱 A couple of them apparently.
Looking good with the tester Oliver.
Looking good with the tester Oliver.
I followed you lead re Tiger when I built the kx amp it seemed sensible to use them again.
Wondering if transformer parameters should be added to BOM? I didn't fine any info in this thread, I know from different thread that people were getting this R-Core transformer: R26-90 primary 115 X 2 : 0-165V(0.1A); 0-9V (1A) X 2
but it would be nice if officially recommended specs were in BOM.
but it would be nice if officially recommended specs were in BOM.