[Collins] Peculiar Request - 872A

[jackiv@juno.com]

Greetings from cold chicago.
An easy way to light up the m-v in the 872 will to use a 100 watt 120
volt bulb in the lamp holder, series with the rectifier, mount the lamp
on top of the tube with a small wire down to the rectifier socket.
May make an imposing lamp assembly.
old jack

On Fri, 31 Jan 2003 15:40:33 -0500 "Zap (Chris)" <zap@xzapx.com> writes:
> Greetings to the list,
> 
> (My apologies if this hits twice, I sent to the old list address by
> accident!)
> 
> I had a few questions concerning where I might be able to find some 
> Collins
> or look-alike parts for a small project I am working on.  For a 
> while now I
> have had the desire to create a unique lamp for the shack, and I 
> finally
> found the right part - a 872A mercury rectifier tube, which will 
> emit a
> purpleish-blue color when the mercury is vaporized.  I have also 
> seen a
> tube-lamp done somewhere that was in a small cabinet that was 
> designed
> awefully similar to a Collins chassis (with the side vents and the 
> crackle
> paint, too).  (I do have a picture for those interested in seeing 
> it.)  I
> wanted to recreate something somewhat like that, possibly using a 
> Collins
> A-line knob or replica to adjust the load and thus the brightness of 
> the
> tube as well.  I also thought it would be unique if I could find the 
> jewels
> used on the KW-1 or KWS-1 for the plate and filament lamps to 
> indicate the
> "status" of the lamp, whether vaporizing mercury or fully operating. 
>  Any
> help with finding these unique items, or any suggestions for the 
> circuit to
> power the tube would be greatly appreciated! :)
> 
> The tube specs, for anyone interested, are as follows:
> 
> heater 5V / 7.5A
> 1250mA rated anode
> 4-pin socket, capped top.
> 
> Thanks and 73,
> Chris, N9WIV
> 
> 
> 
> Sponsored by the Collins Radio Association
> http://www.collinsra.com
> 
>