From Kevi–(at)–pscaleAudio.com Wed May 13 13:50:14 CDT 1998
Article: 104456 of alt.guitar.amps
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From: Kevin Deal / Upscale Audio
Newsgroups: alt.guitar.amps
Subject: Re: Black 6V6′s
Date: 13 May 1998 09:33:00 -0700
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Duncan Munro wrote:
>
> On Mon, 11 May 1998 16:37:30 -0700, Andy R
> wrote:
>
> >RCA 7408′s are like that to sometimes. Probably not a big deal. I guess
> >English Brimars are black too.
> >
> >Andy
>
> Don’t know the make of these, maybe Uncle Ned will come along and tell
> – got 4E6 etched into the glass, and the war dept arrow with MF
> underneath.
>
> Next to that is CV511 and underneath this KB / FB. Tube detectives?
>
> –
> Best Regards, Duncan Munro [BOF #023]
> http://www.duncanamps.simplenet.com/ for SPICE models,
> vacuum tube data and custom guitar amps…

Here’s some codes for you. I don’t know what FB code is…perhaps it
could be related to the Mazda stuff.

KB = tube factory

D = Mullard

DA = Mullard but in different location

FE = STC (Standard Telephone and Cables)

Z = M.O.V

DA = Brimar

In the early 1960′s STC spun off Brimar to “Thorn-AEI Radio Valves and
Tubes LTD”

The history gets a bit complex.

This company made tubes under the Mazda and Brimar names, as well as
Ediswan. FYI, Mazda was a British company for those who don’t know, and
in the 1920′s Ediswan and Mazda were major makers of radio tubes.
Ediswan being the world’s first radio tube maker (A joint efort started
in 1883 by Edison Eletric Light Co and Swan Electric Lighting Co.)

Many of Mazda’s later tubes were made in French factories and are
excellent. I have some of the 6V6GT’s someone mentioned, and they are
very nice sounding, and extremely durable. They are early production
made for the war dept labeled “services plublic guerre”. Guerre meaning
war in French.

In fact one of the earliest 12ax7′s I’ve ever seen was a Mazda made in
France. It has the exact same plate as the first Amperex 12ax7 (I’m
talking before Bugle Boy). This Amperex tube is very rare and may not
have even been made in Holland, though the label says it was. The
getter ring of the Mazda is unmistakably Telefunken. It’s very nice.

–
Regards,

Kevin Deal Precision selected fine vintage audio tubes
Upscale Audio Authorized Sonic Frontiers, Anthem, Golden Tube
2504 Spring Terrace Audible Illusions, Presence, Margules/Magenta
Upland, CA 91784 Basis, Benz, B&K, Meadowlark, PSB, Energy
Voice(909) 931-9686 Eminent Technology, Odyssey, Speakercraft, Kimber
Fax (909) 985-6968 Nordost Flatline, Synergistic, and much more

From postmaste–(at)–riodeel.com Wed May 13 13:50:22 CDT 1998
Article: 104359 of alt.guitar.amps
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From: postmaste–(at)–riodeel.com (Ned Carlson)
Newsgroups: alt.guitar.amps
Subject: Re: Black 6V6′s/
Date: Wed, 13 May 1998 02:05:15 GMT
Organization: Triode Electronics
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On Tue, 12 May 1998 12:15:43 -0500, Marc Ferguson
wrote:

>Ned, you are one smart mutha! Please enlighten me on the Mazda 6v6
>tubes.

Mazda 6V6′s are probably French, or at least I’ve heard of French
Mazda 6V6-GT. I did miss British maker, there were Cossor 6V6-G, too,
made in UK, and Cossor did use at least some US numbers, eg: I have
a Cossor 6J5-G here. BTW, the price was 7 bob & sixpence, plus
1 bob & 8d PT, for a total of 9s/2d. Out of a guinea you’d have
recieved 11/10 in change.
Got that?
Don’t quote me, but I believe Mazda is another head of the
Philips hydra, there was British Mazda, French Mazda, plus
another Belgian cousin, Adzam, which is Mazda spelled
backwards.

I’d bet FIVRE in Italy and Neotron in France made
6V6-G, too. Just to confuse matters further.
ADZAM did make 6SQ7-GT, so I’d bet they made
(or sold) 6V6-G or GT, also.

Ned Carlson Triode Electronics,2225 W Roscoe Chicago, IL, 60618 USA
ph 773-871-7459 fax 773-871-7938
12:30 to 8 PM CT, (1830-0200 UTC) 12:30-5 Sat, Closed Wed & Sun

http://www.triodeel.com

Text file catalogs:Catalog ‘Bot at catalo–(at)–riodeel.com