94. Boatanchor notes/articles
see also pg e76
94. Boatanchor notes/articles
see also pg e76
Please note: The articles
are not sorted.
Steps have been taken to prevent Google from searching on this
page, but you may easily search when you found the page.
Articles from Radio communication, mainly
Technical topics (G3VA):
More on receiver front ends
...................................................... Radcom TT
Mar 96 pp 67
Single-Valve transmitters
.......................................................... Radcom
TT Dec 96 pp 63
Vackar VFO-PA transmitter (ECL80)
..................................... Radcom TT Dec 96 pg 63
Mechanaical filters revived
.........................................................Radcom
TT Nov 96 pp.61
The story of the key
...................................................................Radcom
May 95 pg 57
100 years of radio
.....................................................................
Radcom TT Dec 95 pp59
Amateurs and the VE day and VJ day anniversaries
................... Radcom TT May 95 pp 59
Portable operation in the valve era
............................................. Radcom TT aug 97 pp
80
Regenerative receivers
...........................................................
...Radcom TT june 97 pp 62
Regenerative 'straight' receivers
................................................. Radcom TT Apr
97 pp 65
Valve practice recalled, screen grid keying
................................ Radcom TT March 97 pp 71
Screen regulator for high-power tetrodes
................................... Radcom TT March 97 pg 70
Frequency response of the 100kHz filter
.................................... Radcom TT May 98 pp 59
SSB product detector for vintage receivers
................................ Radcom TT May 98 pp 57
The super VXO (6V6, 6J5) VK2JR - 1948
.............................. Radcom TT June 98 pp 61
Valves - not dead!
....................................................................
Radcom TT Nov 98 pp 58
SSB on the RA17
.....................................................................
Radcom TT Nov 98 pp 60
Crystal oscillator and VXOs
..................................................... Radcom TT
Sep 98 pp 60
Koerner's original VXO, British Patent Spec. No. 537 (1941)
...Radcom TT Sep 98 pg.61
Pentodes (RV12P2000, 6AM6) as duo-diode-triodes ...............
Radcom TT Nov 99, pp64
Pentodes (Köln E52) as duo-diode-triodes
................................ Radcom TT Nov 99, pp64
Classic valve receivers, CR150, HRO, AR88, model 100-R ......
Radcom TT feb 99 pp 81
New life for the FT200/250
....................................................... Radcom TT
Nov 99, pp 62
The not-invented-here-syndrome
............................................... Radcom TT sep 99
pp 53
Köln E52b original IF filter circuit diagram
................................. Radcom TT sep 99 pp 54
An aerial view of the Hanslope Park and the assoc. workshops
Radcom TT Feb 00 pg56
Beaumanor & the domino intercepts
....................................... Radcom TT Feb 00 pp56
Crystal sets, headphones and pi-networks
.............................. Radcom TT Apr 00 pp61
Hand-generator of the 1960s
................................................. Radcom TT Apr
00 pp64
Ressurgence of the Hellschreiber
............................................ Radcom TT May 00
pp55
Thoriated tungsten & the 813 etc
........................................... Radcom TT May 00 pp53
Neutralizing Pioneers , H J Rounds patent No 28413 (1913) ..
Radcom TT Nov 00 pp63
Hazeltine's neutrodyne broadcast receiver
.............................. Radcom TT Nov 00 pg64
Crystal sets & tuning diodes
.................................................. Radcom TT Aug
00 pp 54
VHF battery-operated Radio Pick-up unit (1940) ..................
Radcom TT Dec 00 pp 61-63
Köln E52 (Mw.E.c) xtal filter
.................................................... Radcom TT
Jan 00 pp.57
World's first radio transmitter
..................................................... Radcom Oct
01 pg 10
When receivers were large and heavy
........................................ Radcom TT Oct 01 pg 62
VHF 30-35MHz tunable pus-pull Kalitron oscillator (1934) .......
Radcom TT Oct 01 pg 63
"Quick search" HF receiver developed in 1934
.......................... Radcom TT Oct 01 pg 64
12 December 1901: Did Marconi's ears deceive him
.................. Radcom TT Dec 01 pg 61
Telefunken P57N porable DF receiver (drawing)
....................... Radcom TT feb 01 pp 62
G6GR's pre-war 1.7MHz Franklin oszillator (Jul 39)
................. Radcom TT Nov 01 pp 79
The mosfet 6V6 valve substitute
................................................ Radcom TT July
01 pp 61
Giving valves new life (KT66, EF184/6EJ7)
............................. Radcom TT Jan 01 pp 64
More on the HRO
..................................................................
Radcom TT Jan 02 pp 69
Oscillator tracking recalled
...................................................... Radcom TT
Feb 02 pp 63
Mesny Polyphase oscillators (1943)
........................................ Radcom TT May 02 pp 62
Early Eddystone productdetector (Model 400) ECH35 ...........
Radcom TT June 02 pp 64
PA0SE's modern HF transceiver using HRO tuning mechanism Radcom
TT July 02 pp 61
Thermocouple powered generator
............................................. Radcom TT Jan 03
pp79
Alco portable steam chargers
.................................................... Radcom TT
Feb 03 pp72
GDOs dated & updated
...........................................................
Radcom TT Jul 03 pp. 73
Negative resistance
oscillators...................................................
Radcom TT Jul 03 pp. 74
Evolution of the HF yagi - the role of Brown, Kraus, Roberts ....
Radcom TT Oct 03 pp71
The RCA Antennalyzer
............................................................
Radcom TT Oct 03 pp72
Two-stage GDO usisng ECC81/12AT7/6J6 ...........................
Radcom TT Sep 03 pp 72
Mark of good receiver
............................................................
Radcom TT sep 03 pp 69
6SJ7 as product detector for HRO (G3RZP)
.......................... Radcom TT Jan 04 pp 45
The 'obsolete' HRO of 1939
................................................... Radcom TT Jan
04 pp 45
Clandestine equipment:
Military and clandestine radios of WW2, HRO Senior
........................... Radcom Dec 94 pp60-61
American OSS suitcase transmitter SSTR-1
.......................................... Radcom June 97 pp63
SE108/10
.............................................................................................
Radcom Sep 99 -pp53-54
TT Russian Belka M-2 three valve HF transcvr
..................................... Radcom Mar92 pp39
Wartime German suitcase transmitter SE90/40 (CC2+RL12P50)
...........Radcom May86, TTS 98
Mk.XV set and type 51'1 miniature transmitter
...................................... Radcom Jan87, TTS 148
Abwehr adapter transmitter for BC-receiver (EL12)
.............................. Radcom Jun87, TTS 177
Telefunken 'B2' and British
Mk123.........................................................
Radcom Jul87, TTS 183
Anglo-Polish clandestine radio AP5
transmitter/receiver (BP-series mentioned) Radcom TT
Jul90 pp31
More about the Anglo-Polish clandestine radios
.............................. Radcom TT Oct92 pg35
Eureka 210MHz beacons
......................................................................
Radcom TT Oct 92 pg 35
DASD one valve transmitter of 1937 (using the RS289 valve)
................ Radcom Jan90 pp34
SST-1-E transmitter (SSTR1 American clandestine
transceiver).............. Radcom Jun97 pp63
Paraset MkVII/7 and Ha5K39
(Regenerative receivers)......................... Radcom TT Apr97
Regenerative straight receivers, Ha5K39, Paraset MK
VII/7.................. Radcom TT Nov 97 pp65-66
Replica of Mark VII as built early 1996 by G3JQL (ON5LJ)
................. Radcom TT Apr 97 pg 69
Whaddon (SCU) Mk VII ("Paraset") - drawing
..................................... Radcom TT Nov 02 pp 80
Clandestine radio in Aalesund, Norway
.................................................. Radcom TT Dec
96 pp 69
Military and clandestine radios of WW2
................................................ Radcom Dec94
pp60-61
Blue train and 'Golden arrows'
..............................................................
Radcom TT Feb 03 pp72
Norway & Steam chargers
...................................................................
Radcom TT Feb 03 pp72
More on Golden Arrows, Norway, etc
................................................. Radcom TT Apr
03 pp.85
Inside RSS/SCU (SIS-controlled) Hanslope Park station
...................... Radcom TT Feb 00 pg57
Nash "central" station of special communications
.................................... Radcom TT june 97 pg 62
Secret Listeners: VIs in WWII
..................................G3ASE ................ Radcom
Nov 96 pp 38
Some more notes, probably already
mentioned in another list:
Radcom Jan 00 -pp56-57 The Köln E52 IF xtal filter (Mw.E.c),
DJ6EV
Radcom May 00 -pp55-56 Ressurgence of Hellschreiber. New HF
digital modes
Radcom Nov 87 TT Military equipment, German wartime pp 202
(FuG10)
Radcom May 94 pp52-53 TT, Vintage receivers AR88D, HRO et al
Radcom May 95: pp 59-60 Amateurs and the VE day and VJ day
anniversaries
Radcom June 97 TT Regenerative receivers
Radcom Nov 97 pp65-66 Regenerative straight receivers, Ha5K39
(Hagenuk) , Paraset MK VII/7
Radcom Sep 99 -pp53-54 The Not-Invented-Here-Dyndrome, SE108/10,
Ha5K39, Köln E52, Mw.E.c
Radcom Nov 99 -pp64 Pentodes as double-diode-triodes, RV12P2000,
EF91/6AM6, EBC90
Technical topics scrapbook = TTS, ART = Amateur radio
techniques:
TTS 266: The Tonschreiber B - tape recorder (Radcom Oct 88)
TTS pp34-35: Constant-k crystal filters (Mw.E.c + Köln E 52)
PA0SE (Radcom TT june 85)
TTS pp43, 324-325: Radar history, 50th anniversary, PYE IF strip
(radcom TT 8/85, Sep 89)
ART-6 RSGB (G3VA) pp.65-66 Front-end Design, considering HRO
models, AR-88
see also page e76:
Radcom Nov 1987, TTS 202: Military equipment, Variometers
in German wartime equipment (FuG 10)
Radcom Aug 85 + Sep 89, TTS pp43, 324-325: Radar history, 50th
anniversary, PYE IF strip
Radcom Jun85, TT: TTS pp34-35: Constant-k crystal filters
(Mw.E.c + Köln
E52) PA0SE
Radcom Jul86, TTS 114 The Japanese HRO
Radcom Oct88, TTS 266: The Tonschreiber B - tape recorder
Radcom Sep89, TTS 324. PYE Radar IF Strip (EF50)
Radcom sep99 -pp53-54 The Not-Invented-Here-Dyndrome,
SE108/10, Ha5K39,
Köln
E52, Mw.E.c
Radcom nov99 -pp64 Pentodes as double-diode-triodes, RV12P2000,
EF91/6AM6, EBC90
Radcom may 2000 -pp55-56 Ressurgence of Hellschreiber.
New HF digital modes
Radcom Jan 2000 -pp56-57 The
Köln E52 IF xtal filter (Mw.E.c),
DJ6EV
Radcom May90 D/F Ground-wave HF signals, Telefunken P57N
HF direction finder
Radcom Jun91 pp30-31 Detector/AGC circuits in KwEa
Radcom May91 pp32 The mystery of DAH50 valve
(reflex-type Medium Wave receiver)
Radcom Sep92 pp37 HRO variants and Super-Pro
Radcom Jan93 pp41 Vale - William Halligan, WB9AC (Hallicrafters)
Radcom Apr93 pp58-60 The world of telegraph and Keys (K4TWJ)
Radcom May94 pp52-53 Vintage receivers - AR88, HRO et al
Radcom Dec94 pp62 Close-up of tuning capacitors and drive of Körting
KST receiver
Radcom Jun95 pp67 Morse keys - their story and their users
Radcom Mar97 pp71 Valve practice recalled
Clandestine operation in Norway: "Spioner i eget land" =
Spies in own country (Author: Magne Lein) ISBN 82-476-0280-6
Operating anglo-polish AP-1 set in Norway - pp.116
How Hans B. Clifton fooled the direction finders. pp48 and 311
(Built his own radio set weighting only 4-5 instead of 20kg,
antenna reflectors)
Suggested details for Clifton's radio set
Polish AP5 transmitter (mechanical details shown on the top of
page)
994. Detailed
index of all technical notes on this site
995 List of pages on this
site
I enjoy collecting these
items and I will show them on my website for others to
enjoy. I am not interested in selling them, however - please do
not ask.
Instead, I hope to help others who collect this type of gear and
would like to
hear from them.
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Last updated: 2004.04.06
