John
Thank you for taking the photos and posting them. I particularly like
the little reed for calibration.
I was originally going to engrave the panel with high/low frequencies
but opted for a simple 0 - 10 as I was unsure how things would age; I
did realise the need for calibration adjustment pots in that case. I'm
also playing with the caps in the multivibrator to extend the range and
reduce the range overlap a bit. In practice I just plug it into a
frequency meter (I suppose I should build an all-valve nixie readout
frequency meter to go with it now).
Cheers Grahame
On 09/03/2014 21:44, John Rehwinkel wrote:
I took a few pictures of mine:
Here's an overall view:
http://www.vitriol.com/images/tech/equipment/strobo-iso.jpg
You can see the glow of the flashtube, and the calibration reed below it,
poking up through a hole in the reflector. It's driven by the mains frequency,
so you can use it as a frequency reference.
Here are the dials:
http://www.vitriol.com/images/tech/equipment/strobo-dials.jpg
The large knob adjusts frequency, the smaller one sets range/function. There
are a couple of screwdriver adjustments to tweak the frequency to match the
dial reading.
Here's a top view:
http://www.vitriol.com/images/tech/equipment/strobo-top.jpg
It gives a view of the backlit frequency dial (driven by the knob), the handle,
and the nameplate.
Here's the connector side:
http://www.vitriol.com/images/tech/equipment/strobo-connectors.jpg
And a head-on view:
http://www.vitriol.com/images/tech/equipment/strobo-front.jpg
Cheers,
John
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