THE HONGKONG TELEGRAPH.
THE BUICK MODEL "50"
LIMOUSINE SEDAN.
Combining the qualities of a chauffeur-driven car with those of a closed car for family use, the Buick Limousine Sedan is a distinctive addition to the Buick line for 1924. It is another evidence of Buick's policy of furnishing a car for the majority of motoring needs.
The one-piece curved glass that separates the driving compart- ment from the tonneau can be lowered completely out of sight by simply turning a small handle on the back of the front seat. The car is then converted, into a Sedan for the use of the owner or members of the family.
Sole
Agents :
Hongkong and Kowloon Taxicab Co., Ltd.
Telephone No. 1036.
WEDNESDAY, MARCH 19, 1924.
RADIO NOTES ́AND NEWS.
How to Build A Neutrodyne.
+}
Professor Hazeltine's neutrdyne circuit has gained wide popularity, Here are details of the hook-up and how to construct the set.
Several copies of the set described here are in use and have given wonderful satisfaction in long distance reception with almost perfect clarity and consi- derable volume.
The original was put up at a cost of about $30 and with the phones, tubes, batteries and plug amounted to about $110 in cost.
The parts for this set and their approximate cost-are;
3 neutroformer..
* neutrodons
5 tube sockets
3 rtheostats
2 audio-freq^ency
formers
Trans
firet condensers, 006 mid.
phone jacks
1 variable grid leak con-
denser
1 rubberized panel (about
27 inches by 8 inches)
1 thin copper sheet, size of
panne!
1 wood base, size of pannel
T binding-posi
20 fit. bus wire
The drawings give an idea as to how to prepare the panel for the proper ordination of the various parts. No measurements are given, because these depend: on the size and kind of parts bought. They are shown merely to give the radio fan an idea of the general layout.
The rheostata, if not in com. bination with the sockets as sug- zested, are directly in front of the sockets attached to the panel, the sockits being screwed on the base. FOR BETTER RECEPTION, Each of the neutrodoza or neu- $13.5)tralizing condensers, is mounted 1.50 on the base behind each of the 230. first two suckets.
5.00:
The gridleak and condenserand the two fixed condensers are best 7.00 included where there would be
the least addition of wiring.....
Be sure to mount the trans- 1.70 formers crosswise, so as to avoid
induction.
1.
1.00
The tubes best suited to this hook-up are the UV200 for 4.00 detector and UV201-A for the rest. The 300 for detector, and the C301-A for the others are also .50 applicable.
,30
70
KIND OF MATERIAL. The neutroformers and the trodons are parts made especially
The flament, et "A‚ ̈ battere. 20 is of six-volts capacity and would save considerable replacement trouble if it were of the storage nou-cattery type. The "B", battery. of course, is the storage battery for neutrodyne sets under Hazel- of from 90 to 120 volts. with a tap tine patents. The neutroformer at the 22 1-2-volt connection. 15 a combination of specially la connecting the wires care wound radio-frequency trans-should be taken that all are per former and variable condenser. fectly soldered. Although the The neutrodon is a neutralizing shortest cut possible should be leondenser, sa called because its made from one contact point toļ purpose is to neutralize the capa-another, the set would look better) city between the grid and the and neater, if all wires made] instead of plate of each radio frequency right-angle turns. tube.
crisscrossing at any angles. Try
RADIO
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(+22 PHONES
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If you are fond of picnicking, motoring or swimm he "OUTING " is just the thing to make your parties → 100 success
OKEH STUDIO,
S. Das Vœux Road (Corner of Ice House Street and Des Voeux Road Central).
دوو گه ر نه ماه
Agents.
Telephone No. Contral 4453.
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STOCK CARRIED BY-~~
SHEWAN TOMES & CO.
HONGKONG & CANTON
SOLE AGENTS
E. HING & CO.
SHIPBUILDING MATERIALS, SHIP CHANDLERS &
HARDWARE MERCHANTS.
PHONE CENTRAL No. 1118. 25, WING WOO ST.-
Central.
LIFE'S TRAGEDIES.
JERIAM GACAND
+22
A BATTERY
HOOK-UP AND ARRANGEMENT OF PARTS, ON PANEL AND BASE, OF THE NEUTRODYNE RECEIVER.
One of London's Victims. In getting tube sockets, be to avoid running wires parallel, careful to buy those that have so as to cut out any possibility of Dickens-like characters frequ-the contact point farthest apurt. inductive interference. quently turn up in London's daily This help further to cut down story.
A pathetic history was the capacity between the grid related at an inquest recently on and plate of the radio frequency a woman of between 3 and 60 tubes, especially, and results in A week after she was found better and clearer reception. dying in Long-lane, City, she died) in St. Bartholomew's Hospital An official of the Law Courts gave evidence that she had told him she was a native of Christ- church, near Bournemouth. of wiring up these two parts and
saves much space.
1905 she was certified as insane's
There is a combination socket and theostat on the market which an improvement on the separ- ate socket and rheostate because it does away with the necessity
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**SEUTRALIZING" THE SET. Before the neutrodyne set can be used for reception, it has to be neutrailzed" that is. the capacities between the grid and THE HUMAN ZOO plate ofeach radio-frequency tube have to be fixed ao as to neutralize or obliterate each other. This is the operation:
Plug in the head-set on the phone jack so as to cut off the audio-frequencs, and light the
She attempted to sue the Kensing The rheostats for the amplifier other three tubes -two radio and! ton Guardians, the LC.C. the tubes, both radio and audio, if the detector. Asylums Board, the Royal Com-bought singly, should be of 20 Now tune in any situation until] mission in Lunacy, several doc-ohms resistance, and that for the the greatest possible volume is tors, and two relations, for "un detector tube of six ohms.
obtained. lawfully putting her in an asy- The audio-frequency trans-
Leaving the dials at this point, lum," but her application was formers should have a ratio of take out the first radio-frequency refused. Sbe used to haunt the three to one. Courts of Justice and thought that she was going to get the
AN IMPROVEMENT.
tube and place a slip of paper on one of the filament contact points One of the finest improvements of the socket. Replace the tuba, lunacy laws amended. She lived on the original neutrodyna hook-It will not light, since contact is) by accepting charity and doing up and, in fact, on any set-is broken. Adjust the dials again to ceedle work, and the Masters and the use of a thin sheet of copper the point at which the station is ataff at the Law Courts used to to back up the front panel. Place heard the loudest and then turn help her. On the Coroner's ob- the sheet against the panel with the first neutrodon, or neutraliz- serving that he had never seen holes cut where the dielsing condenser, until the signals "such a skeleton of a woman" the
are, 50 46 not to m. refade out. This neutrodon is then! witness said he believed she hat short-circuit connection with adjusted not had enough to eat for the last them. Then make all negative Take the first tube out of its 10 years. A soft-spoken well-and ground connections direct to socket, remove the piece of paper, educated woman, she would never this copper sheet.
replace the tube and tune in say where she lived. Adother The effect of this operation is again on a station, until you get witness told the Court that she wofold:
the loudest volume,
| was formerly a music teacher, and It eliminates body capacity and. Then repeat the same operation occasionally wrote a little religi- does away with a great deal of with the second tube and the ous music, which his firm used to unnecessary wiring.
second neutrodon. After this ad- print for her on small cards. The Aluminum or tin foil could be justment, with the paper removed" Coroner, in hierdict, recorded i used just as welk but copper is and the tube replaced, the set is that her death was accelerated preferred, because it is more sub-neutralized and ready for recep by starvation,
stantial.
tion by phone or loud speaker.
RADIO SUPPLIES
Copyright 1523 by Publie Larizes CM,
$IF YOU DO NOT
WISH THE BEST. THIS IS THE WROKS PLACE
TRADE
TWO OUTSTANDING REASONS WHY HE CHOSE THE HEADPIECE INSTEAU OF THE LOUD SPEAKER.