NZ vintage radio enthusiast Peter Lankshear.
I have corresponded intermittent-ly with Peter over the years
and late in 2003 I had the opportunity to visit him in Invercargill, New
Zealand. The weather in Invercargill at the time was cold, wet and windy – a
complete contrast to the warm reception I received.
Peter was born in 1928. His father actively encouraged his
interest in things electrical and radio and by the time he was 11, he knew that
his life’s work would be in this field. Around this time he built his first
radio, a single-valve tetrode model "Hiker’s One", using a 49 valve. According
to Peter, he has had a soldering iron in his hand ever since.
Peter has a very inquiring mind and this has stood him in good
stead throughout his career in electronics, television and radio. He qualified
as a Registered Engineering Associate in Electronics, and with his enthusiasm
and ability he eventually became the Broadcasting and Television Transmission
Superintendent for Southern New Zealand with the New Zealand Broadcasting
Service. He held this position for 15 years.
Quartz Hill Receiving Station
Shown here are just two of Peter's Atwater Kent receivers, the Atwater Kent 317 (left) and the "Golden Voice" 84. The 317 used all metal valves and was one of the last models made, while the "Golden Voice" 84 (1930/1) was the first Atwater Kent receiver to use an arched cabinet.
Among his many and varied work activities, he was closely
involved with the New Zealand government’s Quartz Hill Receiving Station during
the 1950s. This station would have been equivalent to the Australian
Communications Authority’s Quoin Ridge monitoring station near Hobart.
Primarily, these stations monitor shortwave radio transmissions
from around the world. They can hear stations we can only dream of hearing due
to their superior receivers, high-gain antennas and low noise locations. They
also have facilities for direction finding of radio transmissions.
Shown here are an Atwater Kent 217 at left and at right, an Atwater Kent 165. The latter featured an 8-inch speaker plus the American "Police Band", which was around 1700-1800kHz. Tuning the "Police Band" usually involved using tapped broadcast band coils, to achieve a slightly higher frequency tuning range than available with the standard coils.
At Quartz Hill, the search radios were Eddystone type 680
communication receivers. As a result, Peter developed a keen interest in
Eddystone receivers and has quite a few in his collection (see photos). He also
belongs to the Eddystone Users Group and often writes articles for their
magazine, which is called "Lighthouse".
During the course of our conversation, Peter informed me that
he is now gradually reducing the size of his collection because, as he pointed
out, he isn’t getting any younger. He subscribes to the view that as we get
older, we should each look at ways of reducing our collection so that it is not
left to people who have no interest or knowledge of our radio heritage. If
that’s not done, our collections could easily end up in the rubbish tip.
The Atwater Kent 627 also featured an arched cabinet.
I mentioned to him that I had recently written an article on
this very subject, in the May 2004 issue of SILICON CHIP.
That said, Peter is keeping his favourite receivers, mostly Eddystones and
Atwater Kents – he is only disposing of the sets that hold less interest for
Atwater Kent receivers
The Atwater Kent 708 was a high-performance receiver, built in 1933. It tunes from 550kHz to 20MHz in four bands & features separate local oscillator & mixer valves, an RF stage & a 2-stage (472.5kHz) IF amplifier.
Atwater Kent receivers form the most impressive section of
Peter’s collection. In Australia, the importation of foreign-made radio
receivers was allowed until 1932. However, after 1932, the popular Atwater Kents
and all other imported sets were no longer allowed entry. This denied
Australians the opportunity to purchase some of the very advanced receivers that
became available in the following 4-5 years.
An Eddystone 750 double-conversion 5-band communications receiver. The set tunes from the broadcast band to 30MHz.
By contrast, New Zealand did not prohibit the importation of
foreign receivers until 1936, so some quite advanced receivers did find their
way into that country, particularly the later Atwater Kents. The cabinets of
these receivers were quite elegant, as can be seen in the photographs, and the
electronic design of the sets was cutting edge – just two of the reasons Peter
concentrated on this particular manufacturer for his collection.
He described the Atwater Kent receivers and their manufacturer
(Arthur Atwater Kent) in considerable detail in the September 1996 issue of
She’ll be right
Left: built in 1934, the Atwater Kent 447 console receiver tuned from 550kHz to 23MHz in four bands. A split stator tuning capacitor is used to provide band-spread on the shortwave bands. The set also features an RF amplifier and a number of refinements to assist in accurate tracking and dial scale calibration. These include semi-circular dial scales that are raised or lowered with the band-change switch, so that the appropriate scale is visible through the dial escutcheon. The window at the bottom of the dial escutcheon is for a "tuning" meter.
If we were to go through the Australian Official Radio Service
Manuals (AORSM), we would see that many Australian receivers made up until the
1940s lacked AVC/AGC and had poor selectivity. Or to put it more bluntly, they
simply lacked good design features. It really was a shame that some Australian
manufacturers didn’t venture out into the world (either in person or via
magazines and books) to acquire good electronic designs for their radios.
Of course, we did have some very good design engineers but
overall, there was too much of the "she’ll be right, mate" attitude. However,
let’s not bag just the mediocre designers in Australia. There were also plenty
in America and New Zealand whose designs left a lot to be desired.
As noted in my article on the Astor OZ in the March 2004 issue,
the design of valve receivers in the USA at least had almost reached its zenith
by the mid 1930s. The only improvements from then on were in valve types, the
use of permanent magnet speakers, and smaller and more efficient components and
coils. However, the circuitry did not change to any great extent, even towards
the end of the valve era.
Above: this Western Electric moving-iron speaker measured about 2'6" (760mm) in diameter and was used in the original New Plymouth radio station in 1928.
Although it is quite evident that Atwater Kent and Eddystone
receivers hold particular importance to Peter, he also has some other very
interesting receivers. These sets include a Philips Theatrette V7A, a
Browning-Drake, a Majestic, an RCA (Radiola 20) and the New Zealand-made Bell
Colt. All are very collectable receivers, with perhaps the Bell the odd one out
because it’s a 50s/60s Bakelite mantel receiver.
In fact, this set was manufactured between 1951 and 1971, being
New Zealand’s best selling radio ever. Naturally, a large number of Peter’s sets
appeared in his articles for "Electronics Australia".
Another Eddystone receiver, this time a model 640. This was one of Eddystone's first post-war receivers (1947) designed for amateur radio operators and covered from 1.8-31MHz. It boasts electrical band-spread, two dial pointers and a total of nine octal valves.
I remembered the Philips Theatrette from Peter’s article and in
fact, had the opportunity to acquire one some time back. However, I declined the
offer as the set had been "ratted" for some parts and I didn’t have a circuit to
help with the restoration. Peter commented that the wiring was like a "dog’s
breakfast" and there was no chassis! However, they worked well, sounded good
into an 8-inch (200mm) loudspeaker and rarely required servicing.
They also had the rather unusual intermediate frequency (IF) of
125kHz. However, it must be pointed out that this wasn’t considered so unusual
in Europe. It also simplified the circuitry, as "up-conversion" to 455kHz (or a
similar IF) was not necessary.
The bottom receiver in this photo is an Eddystone 940, a 13-valve 5-band communications receiver which tunes from the broadcast band to 30MHz. This was the last of Eddystone's valved receivers and used a twin-triode cascode RF amplifier for low noise. The top unit is an Eddystone 870, a 5-valve ship's cabin receiver covering 150-300kHz and 510kHz to 24MHz in four other bands. This receiver was not considered a communications receiver, as it was used solely for entertaining the ship's crew.
Peter and I also discussed the attributes of "space charge"
tetrodes such as the A141 and in particular the 49 valve, which was used in a
number of configurations. The 49 was not really designed as a space charge
tetrode but experimenters and hobbyists found that it worked well in that mode.
It was used in the Hiker’s One and Alf Traeger used it in some of his pedal
radios which were used in the Australian outback.
Made from 1925, the Radiola 20 was RCA's first TRF receiver. It uses the UX199 and UX120 valves, along with three ganged tuning capacitors plus adjustable trimming capacitors for tweaking the tuning. The righthand thumbwheel dial is the regeneration control.
I had commented in my soon to be published book "Outback Radio
– from Flynn to Satellites" that I felt Traeger had not used the valve to its
full potential. However, Peter showed me an early valve data book which set out
how the valve could be used to achieve various outcomes. As a result, I had to
amend a small section of my book prior to publication.
By the way, short-form valve data books such as Philips’
"Miniwatt Technical Data" are extremely useful for obtaining the standard
operating parameters of a valve. However, they generally do not give some of the
more obscure parameters which can make a valve adaptable to a variety of other
It just goes to show that old valve data books can be extremely
valuable; so don’t throw them out.
AC power supply
Left" a Philco 18B 8-valve arched-top 1934/5 receiver. Peter retrieved this set from a country rubbish tip in a very sorry condition. The audio output section of this model was a cut above most, boasting a pair of 42 valves connected as triodes in class AB2 and driving a 200mm (8-inch) loudspeaker. This output stage was driven by another 42 valve.
I mentioned to Peter that the AC power supply for battery sets
that he described in "Electronics Australia" had been quite popular with vintage
radio enthusiasts. It used the power transformer from an old black and white TV
According to Peter, the PC board for this project should still
be available from RCS Radio. It is well made and has silk screen printing on the
non-foil side to assist component placement.
Peter’s small micro-powered broadcast transmitter has also been
built by a number of enthusiasts. However, if you do build one, make sure that
no transmissions can be received outside your premises!
Books & magazines
The Eddystone 680 is a 15-valve 5-band communications receiver, again tuning from the broadcast band to 30MHz. This is one of the search receivers used by Peter at New Zealand's Quartz Hill communications station in 1950-1.
As expected, Peter has an extensive library of good books on
vintage radio and on many other subjects that he’s interested in. Books and
magazines are well worth retaining, particularly the better quality ones. But
even the not so good ones are worth keeping – they are all part of our radio
Peter is a life member of both the New Zealand Vintage Radio
Society (NZVRS) and the Historical Radio Society of Australia (HRSA). He still
writes for a number of publications, including the NZVRS "Bulletin", the HRSA
"Radio Waves", the American "Old Timer’s Bulletin", the British "Radio Bygones"
and the Eddystone User Group’s "Lighthouse".
He also has a number of other interests besides vintage radio.
For example, he is the Southern Vice-President of the New Zealand Railway and
Locomotive Society. He is also active in his local church, where he looks after
a comprehensive sound reinforcing and recording system and produces the weekly
Of course, it’s not surprising that he became involved with the
sound system as another of his electronics interests involves designing and
building audio amplifiers.
In the end, my time with Peter was too limited and I would have
liked to have spent many more hours with him discussing radio, electronics and
vintage radio in particular. And I learnt quite a number of things from our very
Photo Gallery: 1933 Van Ruyten B14
Manufactured by Tilbury & Lewis Pty Ltd, Melbourne, in
1933, the Van Ruyten B14 circuit was conventional for the time, except that the
high-tension voltage for the rectifier was obtained direct from the mains rather
than via a separate winding on the power transformer. As a result, one side of
the mains was connected directly to the chassis. The valve line-up was: 6A7
frequency changer; 78 IF amplifier; 6B7 audio amplifier/detector/AVC rectifier;
42 audio output; and 80 rectifier. Photo: Historical Radio Society of Australia,