I have always been told that the most important characteristic of cooling
glass tubes is that you have to cool the part of the plate cap where it
enters the top of the glass envelope. Overheating at that place can cause
catastrophic failure. I would be wary about using a Coleman lantern globe
because of this. Besides, why not just go out and buy the correct chimney
that has been designed for the tube. You wouldn't put recaps on a Porsche
Carrera.
Bob W6TR
----- Original Message -----
From: "Carl" <km1h@jeremy.mv.com>
To: <hrd998cc@yahoo.com>; "Stirling Schmidt" <kc0nxm@sbcglobal.net>; "AMPS
submit" <amps@contesting.com>
Sent: Monday, July 14, 2008 4:04 PM
Subject: Re: [Amps] cooling chimney?
> This goes back to the 60's so I have no idea what is relevant today nor
> what
> country those parts are made in now.
>
> Id suggest doing a Google and see whats current in discussions.
>
> And a call to Eimac should also generate an answer.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Russ Williams" <hrd998cc@yahoo.com>
> To: "Stirling Schmidt" <kc0nxm@sbcglobal.net>; "AMPS submit"
> <amps@contesting.com>; "Carl" <km1h@jeremy.mv.com>
> Sent: Monday, July 14, 2008 3:25 PM
> Subject: Re: [Amps] cooling chimney?
>
>
>> Carl, can you elaborate on the problems using Coleman chimneys? I plan
>> on
>> using them for a 4-400a project and also know of 2 other hams using them
>> in conjunction with GS-35b's. It seems the Pyrex/borosilicate glass
>> would
>> be ideal for this application. If there have been confirmed disasters
>> using them, other avenues may need to be pursued.
>>
>> I suppose a test in the microwave oven would illuminate any faults in the
>> Coleman's glass formula...
>>
>> Thanks.
>>
>> Russ W6OHM
>>
>>
>>
>>
>>
>>
>>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
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