[Johnson] Fwd: Attenuators for T-bolt xciters

[Richard Knoppow]

      I can't find some of this thread but if the lamps are intended as 
attenuators keep in mind that their resistance varies a lot with 
temperature.  Tungsten filaments have quite low resistance when cold and 
may increase resistance ten time when glowing.


On 3/26/2015 11:30 PM, manualman at juno.com wrote:
> Last time I was in Home Depot, they had 75 watt incandescent bulbs.
>
> Pete, wa2cwa
>
>
> On Thu, 26 Mar 2015 20:36:51 -0500 "Langston, Mike"
> <MLangston at pricegregory.com> writes:
>>> Hello,
>>>
>>> I have a V-II that I am going to use on AM to drive a T-bolt
>> linear. I have built up an attenuator for use between the units per
>> the T-bolt manual schematic. It is enclosed in an alum. project box
>> except for the 75W light bulb which is mounted on top.
>>> First problem was finding a 75W incandescent bulb. Closest I came
>> was a 73W halogen bulb.
>>> Q1 - will that work?
>>> Q2 - the bulb is not shielded. Do I need to worry about that?
>>>
>>> Any help appreciated.
>>>
>>> Mike KL7CD
> ______________________________________________________________
> Johnson mailing list
> Home: http://mailman.qth.net/mailman/listinfo/johnson
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Johnson at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL