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Bob Weiss
Guest
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 Posted:
Wed Sep 21, 2005 4:22 pm Post subject:
Re: Mystery Tube |
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flipper wrote:
| Quote: | On Wed, 21 Sep 2005 04:26:45 GMT, Chris Hornbeck
chrishornbeckremovethis@att.net> wrote:
On Tue, 20 Sep 2005 22:38:43 -0500, flipper <flipper@fish.net> wrote:
Well, since that's a number on it, and printed, I suspected as much
but I can't find a listing anywhere for a 7647.
It's almost certainly a date code, DOM, or re-manufacture.
47th week of 1976.
Chris Hornbeck
That's what I suspected the hand engraved number was. Why would you
suspect the red stamped on number first?
I suppose the red one could be DOM and the engraved one a rebuild.
So you think the "5-6" is the type?
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There is no "7647" listed in any of my transmitting tube manuals, and I
have a pretty extensive colection. Most likely a date code.
The "5-6" may be a type designation, but it would be an "in-house
number" unique to Thermall. Some manufacturers do stuff like this to
prevent the user from buying replacement parts from other, cheaper sources.
Posting a picture might help us identify what you have....
Bob Weiss N2IXK
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- - : R A T B o y : - -
Guest
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| Posted:
Wed Sep 21, 2005 6:24 pm Post subject:
Re: Mystery Tube |
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Flip,
I quoted your post on a neat forum called Big Valve Amps
http://groups.yahoo.com/group/bigvalveamplifiers/ . I was directed there
years ago by a post here at R.A.T.
These bottleheads have an affinity for finding oodles of huge tubes and
building stuff with them. Maybe they'll have a better idea of what you've
got.
I'll repost anything they suggest.
"flipper" <flipper@fish.net> wrote in message
news:iuhvi1lo76fjes4ol71nuvmamlmlhad280@4ax.com...
| Quote: | In a rather strange turn of events I have been given what the
presenter said was simply a "transmitting tube." |
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flipper
Guest
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| Posted:
Thu Sep 22, 2005 10:34 am Post subject:
Re: Mystery Tube |
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On Wed, 21 Sep 2005 13:24:47 GMT, "- - : R A T B o y : - -" <- - : R A
T B o y : - -@shovit_dude.com> wrote:
| Quote: | Flip,
I quoted your post on a neat forum called Big Valve Amps
http://groups.yahoo.com/group/bigvalveamplifiers/ . I was directed there
years ago by a post here at R.A.T.
These bottleheads have an affinity for finding oodles of huge tubes and
building stuff with them. Maybe they'll have a better idea of what you've
got.
I'll repost anything they suggest.
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Thanks! That's nice of you.
I've learned a little more after I ran across the WT LaRose name. I
later saw it in conjunction with Thermall and then I found, on ebay of
all places, a Thermall LE550 Preheater for sale and it sure looks to
me like the label on the thing is specifying a 5-6 as the oscillator
tube.
http://cgi.ebay.com/Thermall-LE-550-Preheater_W0QQitemZ7547913920QQcategoryZ26260QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Also, the bottom of the label says WT LaRose so it would seem that WT
Larose is the company with Thermall a brand name. |
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