On 12.07.15 04:09, Gene Heskett wrote:
> Thats what I get for living as long I guess. We broadcast engineers that
> actually understand, and can fix this stuff are a dieing breed, at least
> locally. All the people I had working for me in 1984 and whose hands I
> could guide to do this when I came to WV and WDTV-tv, have since passed,
> and only one of them was older than I. So I'm the official 'it' now.
> The station owner is fully aware of that, and pays accordingly.
>
> Those 'tank coils' are made out of pure unobtainium in 2015. So I have
> to see if Tarnex & 0000 steel wool will clean it up enough to replate it
> later today. Not one of my fav activities as I may have to take the
> coil out of its holders just to gain access inside it with my fingers.
> Thats not too hard, but putting it back together is a PITA since each
> turn has its own slot in the 4 micarta bars that hold it at the proper
> spacing between the turns. I'd probably need to post a pix before the
> description would make sense.
Rather you than me, playing with that stuff, Gene. Back in '72, I
hob-nobbed with the guys in the radio amateur club at uni - staying at
arm's length from the Tx power stages, and their lethal power supplies.
After that, I went the digital path, where everything's either 5v-ish or
ground.
But your picture of that tank coil comes across as a coil of fat wire or
thin pipe with the notched insulating posts 90° apart around the
circumference, holding the spacing to keep the inductance constant.
Take two posts out, and it might make a fine toast rack? With skin
effect, I can see that a bit of silver plating would do more good than
goanna oil on a bad back.
It must be heart-warming to have the old skills still in demand. The
telecommunications department at NEC, where I spent the last 12 working
years closed some time ago, and the entire telecommunications division
at Siemens, where I spent 18 years, seems to have been sold off and
closed locally. So much for the digital stuff. (The two substantial
redundancy packages were very heart-warming, though.)
And getting old still beats the alternative. My younger brother has just
come off a great-new-hope chemotherapy program a few days ago, 'cos it
isn't doing any good. Surgery, radiotherapy, and a prior chemotherapy
program are all done and dusted. Good thing he's packed in more
adventures and scrapes than most, for what that's worth.
Erik
--
The universe contains any amount of horrible ways to be woken up,
such as the noise of the mob breaking down the front door, the scream
of fire engines, or the realization that today is the Monday which on
Friday night was a comfortably long way off.
- Terry Pratchett, _Moving Pictures_
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