[Hallicrafters] Tubes

Mon May 13 12:49:04 EDT 2013

That piece of bamboo is a must in the case of replacing the tubes in the 
center section of the SX-100, no room to get your fingers in there.  
After you figure out how to remove the snap-on tube shields and get the 
tubes out of their sockets, you need something like that to put them 
back in.  I didn't have any bamboo so I used a wooden dowel with a 
shallow hole drilled in one end.  I hope I never have to remove those 4 
tubes again.

I don't understand why Hallicrafters used the snap-on shields in those 
positions rather than the twist lock they used on the rest.

David
KW4DH

On 5/13/2013 9:13 AM, Charlie T, K3ICH wrote:
> David, in order to get the best (warm) sound from the 6C4's, even if 
> they are used in an RF circuit,  you MUST paint the very tip of the 
> glass with a green felt tip marker.   This encourages only the 
> acceptable "green" electrons to make the journey from cathode to plate.
>
> When inserting the tube, do NOT just push down using your thumb and 
> fore-finger !  Gently set the tube, properly positioned in the socket, 
> and push it down with a small piece of bamboo such that the glass tip 
> goes up in the hollow part of the bamboo. Obviously, the outer 
> diameter of the bamboo must be smaller than the diameter of the 
> tube.   Squeezing pressure on the glass envelope will allow weak spots 
> which will admit an undue amount of cosmic rays (similar to the 9th 
> ray of Barsoom) to enter and disrupt the flow of those aforementioned 
> green electrons.
>
> There are said to be some mystic chants (different for dual triodes or 
> beam power tubes)  you must perform before actually applying power to 
> the circuit, but I feel that is taking things a bit too far and not 
> really necessary.
>
> 73, Charlie k3ICH
>
>
> ----- Original Message ----- From: "David C. Hallam" 
> <dhallam at knology.net>
> To: "Duane Fischer, W8DBF" <dfischer at usol.com>
> Cc: "Gary" <xfrmrs at roadrunner.com>; <Hallicrafters at mailman.qth.net>
> Sent: Monday, May 13, 2013 8:06 AM
> Subject: Re: [Hallicrafters] Tubes
>
>
>> Thanks for all the replies about my need for a 6C4 tube.  I guess my 
>> attempt to put some humor in the post with facetious references to 
>> audiphool requirements for tubes was missed.  I had just looked at 
>> 6C4's on eBay and saw all the information given about matched 
>> pair/quad, plate color, triple mica, etc.  I now have the tube I need.
>>
>> David
>> KW4DH
>>
>> On 5/12/2013 10:21 PM, Duane Fischer, W8DBF wrote:
>>> Whomever it was that wanted this tube, speak up! Contact 'Mr. 
>>> Parts', Gary, WZ1M. He will treat you, and your wallet, well! Thanks 
>>> Gary -
>>>
>>> ----- Original Message ----- From: "Gary" <xfrmrs at roadrunner.com>
>>> To: "Duane Fischer, W8DBF" <dfischer at usol.com>; 
>>> <dhallam at knology.net>; <Hallicrafters at mailman.qth.net>
>>> Sent: Sunday, May 12, 2013 5:00 PM
>>> Subject: Re: [Hallicrafters] Tubes
>>>
>>>
>>>> I have three 6C4 tubes with the Hallicrafters logo, if interested.
>>>> Regards,
>>>> Gary
>>>> ----- Original Message ----- From: "Duane Fischer, W8DBF" 
>>>> <dfischer at usol.com>
>>>> To: <dhallam at knology.net>; <Hallicrafters at mailman.qth.net>
>>>> Sent: Sunday, May 12, 2013 5:27 PM
>>>> Subject: Re: [Hallicrafters] Tubes
>>>>
>>>>
>>>>> I would contactStan Winston in FL.
>>>>> ----- Original Message ----- From: "David C. Hallam" 
>>>>> <dhallam at knology.net>
>>>>> To: <Hallicrafters at mailman.qth.net>
>>>>> Sent: Saturday, May 11, 2013 10:00 AM
>>>>> Subject: [Hallicrafters] Tubes
>>>>>
>>>>>
>>>>>> I need to purchase some 6C4's which brings me to big decisions. 
>>>>>> Should I buy gray plate or black plate or is there some other 
>>>>>> color plate that is better? What kind of getters should they 
>>>>>> have? Should I buy GE or RCA or Raytheon or NOS Mil tubes.  So 
>>>>>> many choices!  Geez, the audiophools have screwed up the market 
>>>>>> for everything!!!!
>>>>>>
>>>>>>
>>>>>> "I predict future happiness for Americans if they can prevent the 
>>>>>> government from wasting the labors of the people under the 
>>>>>> pretense of taking care of them." Thomas Jefferson
>>>>>> ______________________________________________________________
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>>>>>>
>>>>>> List Administrator: Duane Fischer, W8DBF
>>>>>> ** For Assistance: dfischer at usol.com **
>>>>>>
>>>>>>
>>>>>> This list hosted by: http://www.qsl.net
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>>>>>> 05/12/13
>>>>>>
>>>>>
>>>>>
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>>>>> List Administrator: Duane Fischer, W8DBF
>>>>> ** For Assistance: dfischer at usol.com **
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>>>>>
>>>>> This list hosted by: http://www.qsl.net
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>>>> No virus found in this message.
>>>> Checked by AVG - www.avg.com
>>>> Version: 2012.0.2197 / Virus Database: 3162/5818 - Release Date: 
>>>> 05/12/13
>>>>
>>>
>>>
>>>
>>> -----
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>>> Checked by AVG - www.avg.com
>>> Version: 2012.0.2197 / Virus Database: 3162/5818 - Release Date: 
>>> 05/12/13
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>>>
>>
>> -- 
>> "I predict future happiness for Americans if they can prevent the 
>> government from wasting the labors of the people under the pretense 
>> of taking care of them."
>> Thomas Jefferson
>>
>> ______________________________________________________________
>> Hallicrafters mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Hallicrafters at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html 
>
> ______________________________________________________________
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> Help: http://mailman.qth.net/mmfaq.htm
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>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

-- 
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them."
Thomas Jefferson