[ARC5] Fw: 6k8 - 12k8?

[Henry Mei'l's]

----- Original Message ----- 
From: "Henry Mei'l's" <meils at get2net.dk>
To: "Leslie Smith" <vk2bcu at operamail.com>
Sent: Saturday, April 16, 2011 6:02 AM
Subject: Re: [ARC5] 6k8 - 12k8?


> Thank you Les.
>
> BTW Don't you down Oz and/or the Brits say teyoob (tube)  and teyun (tune) 
> and other quaint stuff like that ? ;0)
>
> Henry
> (aka Fred; middle name, Frederick - better for CW)
>
>
> ----- Original Message ----- 
> From: "Leslie Smith" <vk2bcu at operamail.com>
> To: "Henry Mei'l's" <meils at get2net.dk>
> Sent: Saturday, April 16, 2011 5:56 AM
> Subject: Re: [ARC5] 6k8 - 12k8?
>
>
>> Hello Henry,
>> Australia is the little island separating New Guinea from the mainland
>> of Tasmania.
>>
>> Les
>>
>> -- 
>>  Leslie Smith
>>  vk2bcu at operamail.com
>>  (end)
>>
>>
>>
>> On Fri, 15 Apr 2011 22:59 +0200, "Henry Mei'l's" <meils at get2net.dk>
>> wrote:
>>> Where's Australia? Is that where they blow into alpine horns aka
>>> "stoobs"--perhaps ein kleine dorf in the Austrian Tyrol?
>>>
>>> Henry (D-  in school geography)
>>>
>>> ----- Original Message ----- 
>>> From: "Leslie Smith" <vk2bcu at operamail.com>
>>> To: "ARC-5 List" <arc5 at mailman.qth.net>
>>> Sent: Friday, April 15, 2011 10:39 PM
>>> Subject: [ARC5] 6k8 - 12k8?
>>>
>>>
>>> > Dear list,
>>> > I have a valve (or "toob") marked 12k8.  Manufacturer: KEN-RAD,  The
>>> > cold filament resistance is around 3.9 to 4 ohms.  This is out of the
>>> > set, unconnected.  Is this a 6k8 that is mis-labelled?  My experience 
>>> > to
>>> > date has been that the cold resistance of any of the VT13x "toobs" is
>>> > around 12 ohms.
>>> >
>>> > I'm uncertain about the source of this valve.  It came from a box with
>>> > valves, IF transformers, chassis screws etc that was in another box
>>> > containing a "scrap" BC-453 I am in the process of rescuing from a
>>> > morbid fate.  In other words I don't know where it came from.
>>> >
>>> > I found it in the following manner.  Last night I was at the stage of
>>> > re-fitting the valves to the "scrap" chassis; I inserted a pair of
>>> > valves, turned the filament supply "on" and measured the voltage at 
>>> > the
>>> > junction of the two filaments.  In this case, that turned out to be
>>> > about 20 volts.  Hmmmm.  (Thinks ... this is unusual, Mr. Ohm is doing
>>> > strange things ....)  Do various things - make various checks.  Mutter
>>> > about socket resistance and promise to never wash another chassis in
>>> > Dot's Bath Cleaner.  Got another 12k8 (this one was made by RCA) and
>>> > measured the cold filament resistance.  Around 12 ohms.  Put this 12K8
>>> > (by RCA) into the chassis, and measured the voltage at the center 
>>> > point
>>> > of the two filaments.  Near enough to 12 volt.  (Thinks:  Dot's bath
>>> > cleaner may not be so bad after all.)
>>> >
>>> > I imagine this valve somehow got from the 6K8 batch into the 12K8 
>>> > batch
>>> > before the labelling machine at KEN-RAD.  Any-one seen this before? 
>>> > Or
>>> > maybe it's just a broken filament in a 12K8?
>>> >
>>> > 73 greetings from Australia
>>> >
>>> > Les
>>> >
>>> > -- 
>>> >  Leslie Smith
>>> >  vk2bcu at operamail.com
>>> >  (end)
>>> >
>>> > -- 
>>> > http://www.fastmail.fm - Send your email first class
>>> >
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>>
>> -- 
>> http://www.fastmail.fm - mmm... Fastmail...
>>
>