The Technophool page
links
checked 19 Apr 07
Some retro-tech articles on this site:
1922 booklet on Armstrong's superregenerative
radio circuit Thanks to Larry Fowkes
1931 Service info from the Radio Television Institute
(separate page) Thanks to Danny Gay
1934 Thordarson Sound Amplifier Manual
Thanks to Bill Pulhamus for these
1934 Thordarson Catalog 341 -
Replacement Transfomers
1935 Amertran (American Transformer)
catalog
1935 Thordarson Radio Servicemen's
Guide
1935 Thordarson Transmitter Guide
1937 Thordarson Sound Amplifier Manual
1937 Thordarson Servicemen's Guide
(Lindsay Books has reprinted several
of these)
1938 Thordarson Radio Service Guide
(DjVu format - see Home page)
1938/39 Thordarson Catalog 400C
1938 Gernsback booklet: "4 Shortwave Sets by W. C. Doerle" 3.7
mb pdf 1.9 MB DjVu
(Thanks John!)
1941 Thordarson Sound Amplifier Manual 346D - DjVu format
1941 Thordarson Tru-Fidelity Transformer Catalog 500FX - DjVu format
A few '30s - '40s Philco Service Bulletins
(separate page) - DjVu format
40s-50s data sheets from Utah Transfomer
and Thordarson (universal series)
1946 RMA (later to be EIA) code list - Thanks to Larry Long - his radio data page
1947 Thordarson transformer Catalog 400G - DjVu format
1947 article on Triplett 2413 (most
emission tube testers are similar) Thanks to Jimmie
Stewart
1949 article by Frank McIntosh introducing
his "unity coupled" amplifier - also thanks to Bill Pulhamus
1953 RTMA (later EIA) code list from Sams - 4.5 MB PDF 200K DjVu
The 1953 Radio's Master catalog had these pages from Freed,
Kenyon,
Peerless,
and a few HiFi pages
1954 paper by A.B. Bereskin on building a high
quality amplifier, with details on transformer design
1955 article by A. B. Bereskin on building a 3000
watt amplifier - Thanks to Caryl Pierson for these
1955 article on Stereophonic sound from
Popular Electronics, and another on How
Tuning Eye tubes Work
1956 article from Radio Electronics on Hi
Fi
Amplifier Output stages
1957 list of EIA codes from Sams - numeric
list in DjVu format (better scans below)
1957 RCA COLOR
TV
brochure - DjVu format
Some 1950's hi fi scans
1958 Concord catalog Hi Fi pages
Radios,
etc. (Multiply prices x 5 for today's equivalent) DjVu
format
1958 application notes on using a sine-square
generator from Precision (DjVu format)
1959 list of EIA manufacturer codes from Sams Photofacts - DjVu
- ZIP - .gif - 1,
2,
3,
4,
5,
6,
7,
8
1959 Mullard booklet on building
a 2W stereo amp - thanks to Dennis Grimwood (DjVu)
1961 list of EIA codes from Sams - 5.5 MB PDF
1962 list of EIA codes from Sams - 300K DjVu 2 MB PDF
1964 article on estimating ratings of unknown transformers 1,
2
(thanks to Alan Douglas)
1994 (reprint) article on measuring unknown filter chokes from Sound Practices: 1, 2
1994 EIA code list 3.5 MB PDF - thanks to Dave Levasseur
More transformer catalogs (thanks to Pat Jankowiak), all in DjVu format:
Merit 1951, Triad
1952 (partial), Stancor 1954,
UTC
1960, Stancor 1966, Triad
1971 (partial)
...and more: Chicago Transformer
1958, and Centralab (includes those
pesky PECs
or couplates)
...found at a hamfest: Kenyon Transformer
1940 and Stancor 1951 - and UTC
Terminal
Arrangements
...and Clarostat 1946
Schematic Links on theWeb:
Tech Info at Aiken
Amps (not just for guitar amps...)
Vintage tube amp schematics at AmpsLab
Andrea Ciuffoli - Audio
Steve Bench has
a site with some unorthodox circuits - now gone - here's a copy.
Bob Casey's
Old Radio Page
Eico Audio
Components - gone - try the Wayback
Machine
Glowbugs,
more Glowbugs, a
favorite glowbug (haven't
built it yet...), one I DID build 35
years ago
Ham Radio manuals online (archive)
More Ham
Radio, CB, Russian tubes
Heathkit Circuit Archive-
GONE... some still on the Wayback
Machine but here
it is revived!
Heath, Knight, Eico and more at Kit
Central
Marantz schematics
-(now gone! but Archive)
Norman Koren has written
an interesting page on amplifier design
Fred Nachbauer
"mad retro techie" is gone, but I am glad I knew him.
Luca Rossi
has many European schematics on line... Parlate italiano?
Not Schematics but...
The EIA's Source Code lists
Audio Basics
newsletters from Van Alstine
An archive of Patrick Turner Audio, may he rest in peace
A few old transformer
catalogs from Pat J. - are BACK at the Bunker
of Doom!
More transformer
catalogs from Pete Millett, and a few reference
books too
Mmmm... Donuts! Plitron has several articles on toroid
transformers for audio
TubeCad Journal
Amateur Radio Technical
links
Project Gutenberg has reproduced the 1922
Radio Amateur's Handbook (and others - search on "radio")
Literature
Archives at Pearl Hifi
Let's Talk Speakers!
at Weber Speakers
Audiotools
Vintage radio
ads - check 1930 tube prices...
Audio Projects series at Audio Express
Boatanchors
- some links for those old SW and Ham clunkers...
Allied Electronics
Databook from 1966 (see below for tube substitutions...)
Audio manuals at HiFi Engine
Hi-Fi Literature - ads from '40s
to '60s (and check "MAD looks at Hi-Fi")
Crystal Radios at MakeaRadio.com
For more on crystal radios, stay
tuned...
Philco radio, more Philco,
Zenith
(30's...)
Atwater Kent.. can't forget
Crosley
Classic audio: McIntosh,
H.H.
Scott, Marantz,
Sansui,
JBL/Altec,
Fisher
consoles
Vintage Technics,
classic Speakers, FM Tuners,
Dual
turntables, Voice of Music,
AR
turntables
An hp
Museum, the hp
Archive
Stereo Manuals and more
Jim McShane is THE expert on Harman
Kardon Citation tube amplifiers
Antique Radios - forum,
articles, classifieds, links
Find radio stations by location, call letters, or format at radio-locator
- coverage maps too!
Retro Thing - vintage and retro-tech
Vacuum Tube Data:
Amperite current regulators 1,
2,
3,
4
(Thanks to John Stewart)
The Obsolete and Seldom Used list from
the 1946 Sylvania data book
My list of similar and equivalent tubes
with different bases
A list of tube introduction dates
which might help in dating an old radio (Thanks to Ken Owens)
1928 Price list for RCA tubes
(multiply x 10 for today's equivalent)
1945 Sylvania Aids to Wartime Servicing
(tube substitutes)
1945 Sylvania Tube Characteristics
booklet
1946 Clarostat Ballast tubes
1946 articles from Sylvania News (thanks to Bas Horneman):
VR Tubes 1, 2
Plate Ratings 1, 2
Grid Emission 1, 2
Filament Failure 1, 2
1953 Sylvania Tube Substitution
booklet
1954 Sylvania Transmitting Tubes
booklet
1963 RCA Industrial Nuvistors booklet
1969 RCA Industrial tube booklet
Vacuum Tube Data on the web:
From the Allied 1966 Electronics Databook - tube substitutions:
0A2-, 2ER5-,
3W4-,5DH8-,
6AT6-,
6BM5-,
6CU6-,
6GK5-,
6L5-,
7DJ8-,
11KV8-,
12CA5-,
17D4-,
35C5-
Foreign -> American: 1H33-,
D77-,
EF812-,
PM07-
and American -> Foreign: 0A2-,
4ES8-,
6BD7-,
6EL7-,
8A8-,
16GK8-
Tube books at Archgive.org
Duncan Amps Tube data
search, design software, schematics...
Tube Classics has data on European
audio tubes
NJ7P Tube Search
A LONG list of tubes with basic data, pinouts, substitutes...
Pete Millett's
HB-3 Over a thousand RCA data sheets - more
tube manuals too
Frank
Philipse Electron Tube pages - over 20,000 tube numbers!
Nostalgia Air
Tube Substitutions
VT52 - audio
Roehrentabellen
(German for "Tube Tables") - in English too
DrTube Audio tube
data
Amperex
1963 condensed catalog
1933 RCA tube
manual (8 MB pdf file), 1937
RCA tube manual (15 MB pdf)
Sylvania 1943, 1949 and 1959, RCA RC-25 (1966) and TT-3 and TT-4 -
all at the Bunker of Doom
Mike's Electric Stuff -
Nixies, many REALLY weird tubes
UK National Valve Musem
...basic data for many tubes
Tuning Eye Tubes... (in German, it's "Magishe
Augen") ...and more tuning eyes...
More on Russian tubes in
German, though... translate with Google or Babelfish
Here are some tube data and curves...
12V "Space
charge" tubes
EIA manufacturer
codes, Philips Codes
Data on grounded plate operation
of 6AU6 - thanks to Ray Moth
Tube manufacturers / sellers (with data online)
Svetlana US is GONE but check the Wayback Machine - Tube
list Tech
notes
JJ Electronic
Eimac Transmitting
Tubes
Ask Jan First has Infozone
- including this neon glow
lamp manual
Tube Tidbits
from Vacuum Tubes Inc.
Vintage Components, in the UK
Vintage Tube Services has started a history
of tube makers
For Western
Electric tube data, go to the source...
Triode Electronics
Tube data page
Ned's new site has Tube
data too...
Nixie tube data
at Sphere
Other technophools...
Tube
Audio forum... another
forum... another
Now THIS is a
power tube!
High-speed photography at Liquid
Sculpture
Where's Waldo? At the Silicon
Zoo!
Technofossils! OK, historic
scientific apparatus...
The Steampunk
Workshop
How to make... stuff at Instructables
and Hacked Gadgets
"Spread Spectrum" radio stems from this 1941
patent. You may have heard of the Inventor...
Arthur C.Clarke proposed communications
satellites in geostationary orbit in 1945
As for inventors, Edwin
H. Armstrong rates right up there... his 1936
paper on FM radio
Remember Popular Electronics Magazine? You'll remember Don
Lancaster!
Dave's Homemade Radios - more homemade
radios at Sparkbench
Now HERE is a radio collection - Radiotiques
And Radiola Guy !
Bob Pease was Staff Scientist
at National Semi. His columns
in Electronic Design were great!
Here's an interesting
collection
The Valve Page
A collection of Radio
Direction Finders
The web page of... Philco
Grump
And heeere's Triode Guy!
Thermionic madness at Tubelab
A page devoted to the Knight-Kit
Wireless Broacaster
Broadcasting
From the Home! at SMECC
More DIY devices - Instruments
of Amplification
More things that glow: Neon
University, Kilokat's
Antique Light Bulbs, Xenon
flash tubes
Before there was a 555 timer... there was the lowly neon
bulb...
The transistor is now over 50 years old - history at the Transistor
Museum.
Obsolete calculators, computers, semiconductors... at Decode
Systems
Maybe you need Proximity
fuzes
Build
your own laser
DON'T try this at home (but if you do, I want to watch...) Teslamania!
Fun With Tubes - just what
it
says....
The Tube Lust
page at Enjoy the Music
World Tube Audio
Portal - links to everywhere
A site dedicated to my favorite science fiction writer, Robert
A. Heinlein
Boozhound Labs ... well, hard
to explain...
What to do with those useless TV Tubes...
All you geetar pickers need one of these
here geetar tunas...
Data sheets for the Belchfire
6000SUX, the Umac
606, and Signetics Write-Only-Memory 1,
2
Light emitting Vegetables
... and Kimchee
Pay attention, because It's
the Law!
