[Hallicrafters] Hallicrafters Digest, Vol 163, Issue 5
ROBERT JURISH
k9dt at comcast.net
Fri Sep 15 12:39:07 EDT 2017
I have 2 NOS. boxed and 1 good used tssted in quality tube testers.
Bob K9dt at comcast.net
> On September 15, 2017 at 9:33 AM hallicrafters-request at mailman.qth.net wrote:
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> Today's Topics:
>
> 1. Re: 6SC7 tubes new or used wanted (Jacques Fortin)
> 2. Re: 6SC7 tubes new or used wanted (Richard Knoppow)
> 3. Hallicrafters HA-1 (TO Keyer) woes (Doug Hensley)
> 4. Re: 6SC7 tubes new or used wanted (Ray Keefe)
> 5. Re: 6SC7 tubes new or used wanted (w5jo at brightok.net)
> 6. Re: 6SC7 tubes new or used wanted (Richard Knoppow)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 14 Sep 2017 21:35:35 -0400
> From: "Jacques Fortin" <jacques.f at videotron.ca>
> To: "'Richard Knoppow'" <1oldlens1 at ix.netcom.com>, "'jeff'"
> <jeffv at op.net>, <hallicrafters at mailman.qth.net>
> Subject: Re: [Hallicrafters] 6SC7 tubes new or used wanted
> Message-ID: <[email protected]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi all,
> I have some 6SC7 GT made of glass.
> Some NOS are on sale at:
> http://dbtubes.com/en/search?controller=search&orderby=position&orderway=des
> c&search_query=6sc7&submit_search=
> I'm not related to this site in any way but prices and service are good.
>
> 73, Jacques, VE2JFE
>
> -----Message d'origine-----
> De?: hallicrafters-bounces at mailman.qth.net
> [mailto:hallicrafters-bounces at mailman.qth.net] De la part de Richard Knoppow
> Envoy??: 14 septembre 2017 21:22
> ??: jeff <jeffv at op.net>; hallicrafters at mailman.qth.net
> Objet?: Re: [Hallicrafters] 6SC7 tubes new or used wanted
>
> As far as I can tell from old tube data books they were metal tubes.
> Of course, there were both glass and metal of many tubes but I think this
> one was metal only.
>
> On 9/14/2017 6:02 PM, jeff wrote:
> > On 09/14/2017 07:15 PM, Richard Knoppow wrote:
> >> ???? I think you have to check each model separately.? The 6SC7 is
> >> used in some but not in others. For instance, it is used in the SX-28
> >> but not
> >
> > were they made with glass? I have a guitar amp that uses them and I've
> > only seen metal.
> >
>
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
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>
> ------------------------------
>
> Message: 2
> Date: Thu, 14 Sep 2017 18:40:27 -0700
> From: Richard Knoppow <1oldlens1 at ix.netcom.com>
> To: Jacques Fortin <jacques.f at videotron.ca>, 'jeff' <jeffv at op.net>,
> hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] 6SC7 tubes new or used wanted
> Message-ID: <1a56227c-d876-f19c-5225-7906dbb42602 at ix.netcom.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Well, that's the definitive answer. A lot of tubes were made both ways.
>
> On 9/14/2017 6:35 PM, Jacques Fortin wrote:
> > Hi all,
> > I have some 6SC7 GT made of glass.
> > Some NOS are on sale at:
> > http://dbtubes.com/en/search?controller=search&orderby=position&orderway=des
> > c&search_query=6sc7&submit_search=
> > I'm not related to this site in any way but prices and service are good.
> >
> > 73, Jacques, VE2JFE
>
>
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 15 Sep 2017 02:56:12 +0000
> From: Doug Hensley <w5jv at hotmail.com>
> To: "hallicrafters at mailman.qth.net" <hallicrafters at mailman.qth.net>,
> boatanchors mailman.qth.net <boatanchors at mailman.qth.net>
> Subject: [Hallicrafters] Hallicrafters HA-1 (TO Keyer) woes
> Message-ID:
> <SN1PR15MB04139F39D99967E7404260B1916C0 at SN1PR15MB0413.namprd15.prod.outlook.com>
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Anyone with service experience on the HA-1? If so and you don't mind steering me a bit, get in touch directly please. Not on the list.
>
>
> Cheers,
>
>
> Doug W5JV
>
>
>
>
>
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 15 Sep 2017 07:53:39 -0400
> From: Ray Keefe <K2RJK at THEWOODENHAM.COM>
> To: hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] 6SC7 tubes new or used wanted
> Message-ID: <c698f3fe-3699-3f07-df1b-65ef3fb791d5 at THEWOODENHAM.COM>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> I have often wondered about the difference between metal and glass
> versions.
>
> What I have found is if the tube was made in both metal and glass the
> metal version would be called a 6SC7 and the glass version would be a
> 6SC7 GT (Glass Tube).
>
> Here's a link to an article from 1935 about metal vs glass tubes.
> http://www.rfcafe.com/references/radio-craft/metal-vs-glass-radio-tubes-radio-craft-october-1935.htm
>
>
>
>
> On 9/14/2017 9:40 PM, Richard Knoppow wrote:
> > Well, that's the definitive answer. A lot of tubes were made both ways.
> >
> > On 9/14/2017 6:35 PM, Jacques Fortin wrote:
> >> Hi all,
> >> I have some 6SC7 GT made of glass.
> >> Some NOS are on sale at:
> >> http://dbtubes.com/en/search?controller=search&orderby=position&orderway=des
> >>
> >> c&search_query=6sc7&submit_search=
> >> I'm not related to this site in any way but prices and service are good.
> >>
> >> 73, Jacques, VE2JFE
> >
> >
>
> --
> Check out my shop for handmade unique gifts for Weddings and ham radio
> operators www.thewoodenham.com
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 15 Sep 2017 08:24:04 -0500
> From: <w5jo at brightok.net>
> To: <hallicrafters at mailman.qth.net>
> Subject: Re: [Hallicrafters] 6SC7 tubes new or used wanted
> Message-ID: <AF5D32FBF9674C01A6438E9734850618 at JimPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
>
> I wondered the same thing some years back. I replaced a metal tube in some
> receiver because it was very weak. So I got out my tools and lifted the
> tabs at the base of the tube.
>
> Struggling a bit I managed to separate the metal shell from the base to find
> a small glass tube, about the size of a miniature tube, inside surrounded
> by a lot of packing to absorb shock. So you have a glass tube inside a
> well packed metal frame made to help the tube survive a more rugged
> environment. At least the tube I took apart was that way.
>
> Jim
> W5JO
>
> -----Original Message-----
>
> I have often wondered about the difference between metal and glass
> versions.
>
>
>
> ------------------------------
>
> Message: 6
> Date: Fri, 15 Sep 2017 07:32:11 -0700
> From: Richard Knoppow <1oldlens1 at ix.netcom.com>
> To: hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] 6SC7 tubes new or used wanted
> Message-ID: <92bc4dcc-ccb4-9efe-7d5d-a7cf3fc3117a at ix.netcom.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Beware that this is a very early article. Metal tubes were
> introduced about 1934 although I don't remember the exact year. Early
> metal tubes had some problems with their seals so were sometimes a
> little gassy. The problem was solved before long. There are small
> differences in interelectrode capacitances. In some cases glass tubes
> continued to be preferred over metal ones. Metal tubes were claimed to
> have perfect shielding but that is not always the case. There are
> differences in size, for instance, I can not use a glass 6SA7 in my
> S-40A because it is just slightly too large to clear the stop pin on the
> band spread capacitor. That my not be true for other receivers of this
> model.
> BTW, a complete collection of "Radio Craft" is available at
> http://americanradiohistory.com/
> along with many other early radio and broadcast magazines.
> http://americanradiohistory.com/Radio_Craft_Master_Page_Guide.htm
>
> On 9/15/2017 4:53 AM, Ray Keefe wrote:
> > I have often wondered about the difference between metal and glass
> > versions.
> >
> > What I have found is if the tube was made in both metal and glass the
> > metal version would be called a 6SC7 and the glass version would be a
> > 6SC7 GT (Glass Tube).
> >
> > Here's a link to an article from 1935 about metal vs glass tubes.
> > http://www.rfcafe.com/references/radio-craft/metal-vs-glass-radio-tubes-radio-craft-october-1935.htm
> >
> >
> >
> >
> > On 9/14/2017 9:40 PM, Richard Knoppow wrote:
> >> Well, that's the definitive answer. A lot of tubes were made both ways.
> >>
> >> On 9/14/2017 6:35 PM, Jacques Fortin wrote:
> >>> Hi all,
> >>> I have some 6SC7 GT made of glass.
> >>> Some NOS are on sale at:
> >>> http://dbtubes.com/en/search?controller=search&orderby=position&orderway=des
> >>>
> >>> c&search_query=6sc7&submit_search=
> >>> I'm not related to this site in any way but prices and service are good.
> >>>
> >>> 73, Jacques, VE2JFE
> >>
> >>
> >
>
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
>
> ------------------------------
>
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> End of Hallicrafters Digest, Vol 163, Issue 5
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