[Johnson] Fwd: Attenuators for T-bolt xciters

[WA5VGO]

I thought a halogen lamp is an incandescent. Isn't the inert gas in the envelope the only difference between it and a traditional incandescent? I think a traditional incandescent uses argon instead of halogen. 

Darrell



> On Apr 11, 2015, at 11:59 AM, K9FFK <k9ffk at comcast.net> wrote:
> 
> HI, Mike:
> I hope I understand your question correctly...
> I don't think you should attempt to use a CFL/halogen bulb for this purpose.
> The first thing the exciter signal will see is a bridge rectifier. You don't want to deal with the mess that will make with the RF spectrum.
> The CFL/halogens are rated for light output, lumens not power consumed. They are NOT resistive.
> 
> Look for incandescent bulbs. You can string lower power bulbs in series if your in a pinch.
> 
> Good luck.
> 73 Dick K9FFK
> 
> On 3/26/2015 8:36 PM, Langston, Mike wrote:
>>> 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
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