By Chad Hauris, Retro Electronics and
Audio Lab, Midland, TX. Updated 3/17/06
Arborphone Radio. This radio uses 5 type 01A
tubes. We are working on constructing a power supply for the
Arborphone. It uses 6 volts for the "A" filament supply, 22.5 volts for
the detector plate supply, and 90 volts for the "B" plate supply.
the chassis. Testing
the chassis, with speaker and power supply.
For more information on
the power supply, see the Battery Radio
Power Supply page.
We later constructed a new power supply for the radio. John got a
power supply kit from Antique
Electronic Supply, model K-101 A, and constructed in on
perf-board and mounted it in a cabinet.
Please click on the photos for larger views.
Here is the power supply kit assembled in the case. The original kit
has directions for wiring it up on a wooden "breadboard" chassis in the
1920's style, however we felt that assembling it on a circuit board and
putting it in a case made it better looking, and more importantly,
safer. The supply provides a choice of B supply voltages from 22.5-135
(our Arborphone uses the 22.5 and 90 volt taps), a regulated, variable
A filament supply (which we have set to 5 volts) and a regulated,
variable negative C voltage (which is not needed for the Arborphone).
Finshed power supply. We used some retro-style cloth covered cables for
the power leads (they have modern plastic insulation inside).
John testing the power supply.
Test setup on the Arborphone with new power supply.
Tuning in the Arborphone.
Arborphone and Radiola speaker with power supply
Closeup of the Arborphone.