Hi
I have added a webpage where I test a variety of other small CRTs with
the scope clock 2 hardware.
http://www.sgitheach.org.uk/scope2a.html
This page will continue to carry updates as I trial other CRTs and other
PSU configurations. I'm still extending the range of clock faces and
Wonderful as always!
/Martin
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To view this
Id recomend you asking here
http://www.tubeclockdb.com/forum/Related-Technology/2477-Wamco-Alphanumeric-minitrons.html?limit=10start=10#3200
On Tuesday, 11 December 2012 01:17:09 UTC, bryan wrote:
Anyone from here have Wamco Minitrons KW-105S (7-segments)? --
Id recomend you asking here
http://www.tubeclockdb.com/forum/Related-Technology/2477-Wamco-Alphanumeric-minitrons.htmlhttp://www.tubeclockdb.com/forum/Related-Technology/2477-Wamco-Alphanumeric-minitrons.html?limit=10start=10#3200
On Tuesday, 11 December 2012 01:17:09 UTC, bryan wrote:
Anyone
Yeah, I found out that they are still in production for $250 per one item.
Yes, you are right, they are ridiculously expensive. I have old 4 KW-105S. ($10
each from eBay)
--
Bryan Goines
On Monday, December 10, 2012 at 7:35 PM, John Rehwinkel wrote:
Anyone from here have Wamco
Awesome, Thanks! I'll ask there.
--
Bryan Goines
On Tuesday, December 11, 2012 at 12:37 PM, kay486 wrote:
Id recomend you asking here
http://www.tubeclockdb.com/forum/Related-Technology/2477-Wamco-Alphanumeric-minitrons.html
love it! I always wanted to make a scope clock, but i wasnt sure what scope
looks the best, there arent any databases of scopes that would have
pictures of glowing tubes (atleast im not aware of any, if somebody knows
such a site, let me know please!)
On Tuesday, 11 December 2012 13:51:10
I found similar ones on eBay -
http://www.ebay.com/itm/200860310888?ssPageName=STRK:MEWAX:IT_trksid=p3984.m1423.l2649
It might bigger than KW-105S, but I am unsure. I have to look up the
specification.
--
Bryan Goines
On Tuesday, December 11, 2012 at 12:40 PM, Bryan Goines wrote:
Awesome,
Great design and source of information Graham! Fantastic.
Just wondering about 1 thing, is it possible to adjust the brightness
of the scopeclock according to the ambient light? Usually you would
use the control grid of course, but what it you would adjust the
current through the filament? It
Valve [tube] filaments [heaters/cathodes in this case] generally do not have
life extended by running lower power.
Cathode emission is complex and heater should be run within the specs. That
spec is not just to achieve maximum rated emission.
Some oscilloscopes had a connection for cathode
Michel
Ambient light based brightess control is something I have been playing
with. I remember, as a nipper, we had a valve BW TV set with a LDR in
the front panel so it had a sort of automatic brightess control.
But I would certainly do the control by varying the grid voltage wrt the
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