JT30.com

Amps: www.HarpAmps.com
Tab: www.HarpTab.com
Contact Webmaster
Links: www.HarpLinks.com
Learn: www.HarpLog.com
Rock & Roll Lyrics

Mic Kaczmarczik's Amperex history Information

Amperex history

This directory contains USENET articles Mic has saved about guitars, equipment, pickup, techniques, players, and so on. Mic has graciously granted permission to post the stuff on the JT30 page on the off chance that it might be useful in the context of Blues Harmonica. Mic is not responsible for the content, just the collection.

Vacuum Tubes for Amps

Amperex history
From Kevi--(at)--PSCALEaudio.com Sun Mar 16 02:10:07 CST 1997
Article: 26670 of rec.audio.tubes
From: Kevi--(at)--PSCALEaudio.com (Kevin Deal /UPSCALEaudio/)
Newsgroups: rec.audio.tubes
Subject: Re: Amperex Bugle Boy 12AX7 reborn. Any Good?
Date: 15 Mar 1997 15:06:02 -0700
Organization: Primenet
Lines: 52
Message-ID: <5gf6ga$a6--(at)--nrp1.news.primenet.com>
References: <3329b7fc.409883--(at)--ews.hkstar.com>
X-Posted-By:--(at)--04.212.52.245 (upscale)
X-Newsreader: News Xpress Version 1.0 Beta #4
Xref: geraldo.cc.utexas.edu rec.audio.tubes:26670


In article <3329b7fc.409883--(at)--ews.hkstar.com>,
yauy--(at)--kstar.com (Patrick) wrote:
>I have seen Amperex Bugle Boy 12AX7 (and 12AU7) reborn being sold
>locally (Hong Kong). They were marked as "Made in U.S.A." and
>accompanied by certificates dated 1996.
>
>Any one tried it before? Is it comparable with NOS Bugle Boys?


It has nothing to do with a real Amperex Bugle Boy from a manufacturing
standpoint. They are U.S. made JAN spec tubes, mostly Sylvania/Philips ECG I
would guess. Wash 'em, label 'em and there you go....


The history is this:


NV Philips (Holland) bought Amperex in 1955 to market Philips Holland and to
a lesser degree German and French made tubes in the U.S. They also
manufactured Philips designs in the Amperex tube plants, more specifically the
6922 and 7308.


Some British made stuff was made in the Mullard factory, since Philips owned
Mullard outright since the 1920's. These could also be found branded Amperex,
most often EL-34's and 5AR4's. That's why the internal construction is so
similar on all those tubes.


In later years, Philips bought Sylvania...hence Philips ECG which are based on
Sylvania designs. They look the same....they ARE the same. When that
happened the Holland and U.S. factories Amperex stopped production of audio
numbers in the 70's as far as I can tell.


National bought the Amperex name. They are taking U.S. made tubes and testing
them, supplying some report of somesort, them labeling them Amperex with the
Bugle Boy. I have my own opinions on National as a company and a name
in tubes...but should speak to my attorney before airing them.


The constuction of the tubes will be U.S. made and be based on U.S. designs.
Not that they are bad...I just want to clarify that the rumors about buying
old manufacturing equipment from Holland and so on is B.S.




Best Regards,


Kevin Deal Fine Tube Components, Home Theater,
UPSCALE and Vintage Tubes from Telefunken,
Audio/Home Theater/Rare Tubes Mullard, Amperex, etc. Showroom
1410 Lemonwood Dr West Open 7 Days By Appointment.
Upland, CA 91786 (909) 931-9686





 

12AX7 Comparisons
12AX7 gain test
12AX7 vs 12AT7
12AX7 vs 5751
12AX7 vs 7025
5881 in Deluxe
5881=6L6GB
5AR4 data
5AR4 Typing
5V4 for 5AR4
62 Twin Speakers
6550s in Twin
6EY6 Characteristics
6EY6 close to 6V6
6EY6 rating vs 6V6
6EY6
6L6 GC meaning
6L6 Taste Tests
6L6 Types
6L6GC ID
6L6WGB vs 7581
6MB8 tube specs
6V6 6L6 swaps
6V6 duty cycle
6V6 NOS vs Sovtek
6V6 Ratings
6V6 Russian RCA Copies
6V6 to EL84 Cathode Resistor
6V6 Types
6V6=7408
6V6EH Taste Test
6V6EH vs RCA Blackplates
6V6GT Types
6V6GT vs GTA
6V6s in 6L6 amps
7408 info
7581A tubes
7868 equivalents
Amperex history
Best 6V6
Blue Glow Sylvania
Breaking in Tubes
Breathe on tubes
Brimar Special Quality
CEI 6V6GTs
Chinese 12AT7s
Chinese 6V6GTBC
Design Max Rating
EL34 coding explained
Euro Tube Code
Fingerprints
Fuzzy Cathodes
GE and Sylvania
Groove Tubes 6V6HD
Groove Tubes testing
Groove Tubes
GZ34 types
GZ34 Varieties
GZ37 vs 5U4
How Are Tubes Made
Hytron tubes
ID Tube Makers
Identify Tube Makers
Is Tube Matching Needed
LV Visseaux 6V6 Warning
M
Making Tubes
Mazda History
Metal 6V6s
micKtubes
More M
New US 6L6GCs
No More Chinese 12AX7s
Overvoltage Effects
Phillips 6L6GB JAN
Photon Noise
Real Mullard GZ34s
Relabeling
RTV Tube Damping
Ruby 6V6GTBC
Sovtek 12AT7EH 5751 Test
Sovtek 5881 Confusion
Sovtek 5881 data
Sovtek 5881 for 7027
Sovtek 5881 specs
Sovtek 5881
Sovtek 5881WXT
Sovtek 6CA7 problems
Sovtek 6L6WXT+
Sovtek Midget
Sovtek Online
Sovtek page
Sovtek Tube specs
SPICE tube models
Standby Switches
SV 6L6GC
Svetlana 6550s
Svetlana 6L6GC
Svetlana 7591A
Svetlana EL34 review
Telefunken placement
Telefunken Tubes
Tesla 12AX7
Tesla 6L6GC
Tomorrows tubes
Tube Amp Books
Tube Amp FAQ Feb 96
Tube Chickens
Tube Curve Tracers
Tube Data Page
Tube Data Web site
Tube Failures
Tube gas avalanche
Tube heating effects
Tube Manufacturers
Tube Mfgr Codes
Tube mismatch harmonics
Tube Naming Explained
Tube rejuvenation
Tube Relabeling
Tube Stability
Tube types
Tubes for sale
Tubes vs SS
Visseaux 6V6 Warning
Visseaux 6V6
Vudu Tube Replacement
What Does 6L6GC Mean
What is 5881
What is 7027
Which Rectifier
Why 5V rectifier vs 6
Why 6
Why Tubes Coated Inside
Worn Out GZ34s
YA tube page

micK pages


Amps
Caps
Circuits
D-I-Y
Effects
Fender
Guitars
Q & A
Speakers
Tubes
Vendors