[ARC5] VT-158 Zahl radar tube

[Ray Chase]

Just lighting the filaments will be a challange, contrary to what may be 
printed elsewhere, the four filaments are in series so you will need 40 to 
50 volts to light it up.  Gets real hot pretty quick so carefull of mounting 
and cooling.  It is designed for about 20,000 volts pulsed negative to the 
filament, hard to guess what it would do with lesser voltages.
Ray
----- Original Message ----- 
From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
Cc: "ARC-5 List" <arc5 at mailman.qth.net>
Sent: Monday, October 28, 2013 1:13 PM
Subject: Re: [ARC5] VT-158 Zahl radar tube


>  OOPS, the power output is coupled off the plate terminals.
> 73
> Bill wa4lav
>
>
> ________________________________________
> From: arc5-bounces at mailman.qth.net [arc5-bounces at mailman.qth.net] on 
> behalf of Fuqua, Bill L [wlfuqu00 at uky.edu]
> Sent: Monday, October 28, 2013 1:08 PM
> Cc: ARC-5 List
> Subject: [ARC5] VT-158 Zahl radar tube
>
>   I have an unused EIMAC VT-158 radar tube and the frequency meter 
> (absorption type) used with it.
> Not sure where they are just now but always wondered if there was some way 
> to snub out its
> oscillation and use it in a triode amplifier. It would look so cool.
>   I can't figure any way to do that. It has internal resonators and the 
> output apparently is
> coupled off the filament leads where there is an adjustable hairpin stub 
> to set its frequency.
>  I fear that it will oscillate no matter what you do.
>
> 73
> Bill wa4lav
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html