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On 08/07/18 16:11, cheater cheater wrote: > Sorry, having trouble picturing the circuit, mind explaining it in a bit > more detail? Add a netlist maybe? > > On Sun, 8 Jul 2018, 10:12 Tom Gardner,

Sorry, having trouble picturing the circuit, mind explaining it in a bit more detail? Add a netlist maybe?

My preference is 74LVC1G*, which have ~7ohms output impedance, 32mA drive,? and work from ~1V to 5V albeit with different risetimes. If you add a 143ohm series resistance and put three of those in

Hello David, If you have a local B&Q have a look in there. They do a small range of both metal and plastic rods as well as small angle, flat and tubes. Saturday, July 7, 2018, 6:26:57 PM, you wrote:

I have used the dowels from those 6" long cotton swabs to hold wood together for repairs. Drill a hole, glue the wood together, and drive on of the dowels in to hold it in position while it dries.

If you are concerned about setting or controlling the frequency, you can drive the output stage instead from another with XO or a generator. My preferred 74AC driver for fast, strong pulsing is the

A great idea - Hobbycraft has 1/8" hard wood dowels Dave

Okay, Bruce. I appreciate the explanation. I'll have to do the math and see where that puts the target frequency. Thanks, Barry - N4BUQ

At low frequencies where propagation delay can be neglected the frequency will be k/RC where in this case where the output resistance of the 74AC14 can also be neglected: k ~

Also the aluminum cover over the P/S is slightly different to fit the newer transformer. /H?kan

How about 1/" wood dowel rods? They are cheap, and fairly hard. They are used as sticks to make suckers, so they are fairly cheap. You might find then on Ebay, from China or at a bakery supply store.

I'm sure you can import some 1/8" stuff from the colonies? 3.2mm is a standard arrow shaft size, but most are probably carbon (and conductive). R&G in Germany has only 3mm, but that costs almost

Problem is the UK suppliers mostly have 3mm not 3.2mm Dave

You also have to deal with the input and output capacitance of the gate, along with the distributed capacitance in the circuit board. It's also possible that he took the photo from a hand built

No, I'm not overly concerned about the pulse width. I was just wondering why there is a difference between the measured width (on the scope) vs the fequency I'd expected with 1/RC. According to Bruce,

Hi David, I purchased some plastic rod some time ago, but it was 6mm dia. The materials were Peek, Nylon and Glass-reinforced Nylon. They weren't horribly expensive (except the Peek was the most

You can put heat-shrink tubing over 3mm D rod in the areas where larger diameter is needed. Ed

On the SC504, the gain and sweep knobs just pull out after the red variable knobs are removed from their shafts. The SC503 is similar but the knobs are not interchangeable.The variable knob shafts do

David I recently found a source for a similar item here in states at what we call a "Hobby Shop" (Model planes, trains, ships, etc) Dave manuals@... -- Dave Manuals@...

I'm looking for a UK source of 1/8" (0.125" or 3.2mm) diameter fibreglass rods (or other hard plastic) such as is used in many 7000 series plugins. For the specific application (the rod down the