A pair of Philip's soundbar full range 3" drivers.
A pair of Monacor budget 4" universal replacement woofers.
Killers and Reggae CD for SWMBO birthday.
The full range 3"ers look interesting, phase plugged appearance (probably nothing more than a dustcap), also appearing to have a small inverted surround, or perhaps accordion fold/pleated cone termination. I'm hoping these things are a little bit better sensitivity than is usual for drivers of this size.
A pair of Monacor budget 4" universal replacement woofers.
Killers and Reggae CD for SWMBO birthday.
The full range 3"ers look interesting, phase plugged appearance (probably nothing more than a dustcap), also appearing to have a small inverted surround, or perhaps accordion fold/pleated cone termination. I'm hoping these things are a little bit better sensitivity than is usual for drivers of this size.
A dog playpen, my speakers in the living room is full of scratch from my beagle.
Also, I got Sgt. Pepper's Lonely Hearts Club Band album from Amazon today.
Also, I got Sgt. Pepper's Lonely Hearts Club Band album from Amazon today.
I think you'll find any predatory canine urine will work. Ask your vet.
The Pee Mart - Wolf Urine P-Wick* Combo 16 oz E-Z Trigger Spray: Amazon.ca: Gateway
The Pee Mart - Wolf Urine P-Wick* Combo 16 oz E-Z Trigger Spray: Amazon.ca: Gateway
Just for the fun of it and to test, I ordered a bunh of MM5823 fråm China. Either they are newly produced or they are fake.
Bought two DC/DC converters capable of 390V @ 200mA. Will be used to two smaller tube projects that will be powered by 12V MC batteries.
An finally a bunch of various opamps, noise generators, comparators, transistor arrays and j-fets from Unicorn-Electronics.
Bought two DC/DC converters capable of 390V @ 200mA. Will be used to two smaller tube projects that will be powered by 12V MC batteries.
An finally a bunch of various opamps, noise generators, comparators, transistor arrays and j-fets from Unicorn-Electronics.
Cal,
I dont doubt you are correct, just from my very English point of view, the only feral canine is the fox...at least I dont think the neighbours Chihuahua counts...
I'm sure wolves will be reintroduced at some point, as the wild boar have been in some parts of Europe, but I doubt I'd see one.
I see feral Muntjac now and then, and the UK seems to have a lot of deer, compared with a few decades past.
What I didn't buy today:
Dog hurt her knee in winter. Local vet had no good therapy. Went to the hi-price vet, who found a problem, and sent us on to a traveling dog-surgeon working an hour away. Surgery went well, today was time to take the staples out, and of course our local vet's assistant was competent to do that (heck I could, but appreciate the expert).
I know a doc usually takes-out his own staples, part of the job. I was startled that a doc who didn't do the surgery didn't want a fee, even if only 5 minutes of an assistant's time.
Oh- the dog is big, 102 pounds, and the assistant was a slim thing, probably weighed less than the dog. Nevertheless she had no problem dragging my girl into the terrible back room for mystery indignities.
Dog hurt her knee in winter. Local vet had no good therapy. Went to the hi-price vet, who found a problem, and sent us on to a traveling dog-surgeon working an hour away. Surgery went well, today was time to take the staples out, and of course our local vet's assistant was competent to do that (heck I could, but appreciate the expert).
I know a doc usually takes-out his own staples, part of the job. I was startled that a doc who didn't do the surgery didn't want a fee, even if only 5 minutes of an assistant's time.
Oh- the dog is big, 102 pounds, and the assistant was a slim thing, probably weighed less than the dog. Nevertheless she had no problem dragging my girl into the terrible back room for mystery indignities.
Hi mondogenerator,
There is an easier way if you're drawing the artwork. Drill the holes out from the graph paper you used to lay out the pattern. Use steel wool to make them flat. After that, you create your pads, then it's connect the dots time. I do that for really quick PCBs. The traces may look rough, but if you used 10 or 20 div / inch it will look great. All your parts will be lined up properly.
Another trick with artwork is to line the two halves up carefully and tape the two together down one side. Use one or two holes as before, then expose the board. Flip and do the same again. If you are using the toner transfer method, I don't know. The sheet always slips a tiny bit
-Chris
Drill a small hole in each corner of the PCB pattern that lines up with ones made in the artwork. Use small pieces of thin wire large enough to fill the holes to line up the patterns.
There is an easier way if you're drawing the artwork. Drill the holes out from the graph paper you used to lay out the pattern. Use steel wool to make them flat. After that, you create your pads, then it's connect the dots time. I do that for really quick PCBs. The traces may look rough, but if you used 10 or 20 div / inch it will look great. All your parts will be lined up properly.
Another trick with artwork is to line the two halves up carefully and tape the two together down one side. Use one or two holes as before, then expose the board. Flip and do the same again. If you are using the toner transfer method, I don't know. The sheet always slips a tiny bit
-Chris
Sorry to stray further from the topic, but I'm curious: Do you guys ever have problems with failure of soldered thru-pins etc. on homemade boards with no plated vias? I ask because the Baldwin organ company had a line of instruments back in the '80s that used lots of double-sided but not plated-thru boards. In later years they've had lots of problems with failed solder joints on the thru pins. They're extremely hard to pick out visually, and since there are hundreds & hundreds of them in a typical organ, they can really wreak havoc. They're fine once resoldered, but frequently it's a toss-up as to whether it's worth the time/money to go after them all.
Anyway - all my home-etched boards have been single-sided, so I've always wondered if this was a common problem in this situation, or just some kind of flaw with Baldwin's process in particular. (Off-hand, I can't think of any other commercial products I've serviced that used this hybrid, "double-single-sided" approach.)
Anyway - all my home-etched boards have been single-sided, so I've always wondered if this was a common problem in this situation, or just some kind of flaw with Baldwin's process in particular. (Off-hand, I can't think of any other commercial products I've serviced that used this hybrid, "double-single-sided" approach.)
Jim, as far as I know you can get vero pins which you solder both sides to act as a via. I've also done the same using the component leads but it is less reliable.
Thanks for the alignment tips - this is pretty much what I do already, I just dont have much luck getting DIL pads and traces to line up well enough. It's not the process, just me!
Thanks for the alignment tips - this is pretty much what I do already, I just dont have much luck getting DIL pads and traces to line up well enough. It's not the process, just me!
Reminds me of my first job in electronics in 1981.
I worked on Prestel adaptors (forerunner to internet).
When they were built they had used double sided pcb but without vias.
Some bright spark had pressed the pins in for connect top and bottom of the pcb but not soldered them resulting in bad connections over time.
We also had a batch of new pcb's in and none worked.
Turned out someone had bought cheap and nasty IC sockets where the pins that went through the pcb all shorted out on the top of the via.