sans marque - aucun Radio
06
days
19
hours
33
minutes
33
seconds
No bids placed
Catawiki Buyer Protection
Your payment’s safe with us until you receive your object.View details
Trustpilot 4.4 | 126009 reviews
Rated Excellent on Trustpilot.
Description from the seller
A tube-type TRF radio receiver (Tuned Radio Frequency), from 1926, semi-industrial construction.
Two air-variable capacitors, mounted side by side, controlled by two separate buttons,
Heavy construction, thick plates
It's a typical signature of TRF receivers, where each HF stage must be tuned separately.
There are four radio tubes (rear view) with old-style bases, which are distributed as follows:
1 HF lamp
One additional HF lamp or reaction.
1 detector
1 amplification BF
This is a high-end configuration for its time, intended for a discerning hobbyist or a laboratory.
Rigid point-to-point wiring with cotton-sheathed wires and old tin-lead soldering.
The coils are wound by hand on an ancient insulating support (bakelite / ebonite)
Selectivity set by inductance + capacitance
Extremely meticulous work.
The passive components:
Wire-wound resistors
Mica / paper capacitors
No power transformer visible → probably:
separate power supply
batteries (very common before 1930)
Original operation (concrete)
Long outdoor antenna
Manual tuning on two HF circuits
Fine-tuning of the reaction
Detection
Output to a high-impedance headset or external audio-frequency amplifier.
Dated 1927, when the widespread adoption of the superheterodyne was noted.
Streamlining of orders
the progressive disappearance of TRF complexes
Premium radio kit
Artisanal production by an expert amateur
Small local pre-industrial manufacturer
It's a very fine example of early radio, with:
High technical readability and visible components, a scientific/laboratory aesthetic and authenticity intact.
Seller's Story
I am a seller of a wide range of antiques and collectibles dating from different eras, my items are certified by auctioneers to ensure the reliability of my items.
Translated by Google TranslateA tube-type TRF radio receiver (Tuned Radio Frequency), from 1926, semi-industrial construction.
Two air-variable capacitors, mounted side by side, controlled by two separate buttons,
Heavy construction, thick plates
It's a typical signature of TRF receivers, where each HF stage must be tuned separately.
There are four radio tubes (rear view) with old-style bases, which are distributed as follows:
1 HF lamp
One additional HF lamp or reaction.
1 detector
1 amplification BF
This is a high-end configuration for its time, intended for a discerning hobbyist or a laboratory.
Rigid point-to-point wiring with cotton-sheathed wires and old tin-lead soldering.
The coils are wound by hand on an ancient insulating support (bakelite / ebonite)
Selectivity set by inductance + capacitance
Extremely meticulous work.
The passive components:
Wire-wound resistors
Mica / paper capacitors
No power transformer visible → probably:
separate power supply
batteries (very common before 1930)
Original operation (concrete)
Long outdoor antenna
Manual tuning on two HF circuits
Fine-tuning of the reaction
Detection
Output to a high-impedance headset or external audio-frequency amplifier.
Dated 1927, when the widespread adoption of the superheterodyne was noted.
Streamlining of orders
the progressive disappearance of TRF complexes
Premium radio kit
Artisanal production by an expert amateur
Small local pre-industrial manufacturer
It's a very fine example of early radio, with:
High technical readability and visible components, a scientific/laboratory aesthetic and authenticity intact.
Seller's Story
I am a seller of a wide range of antiques and collectibles dating from different eras, my items are certified by auctioneers to ensure the reliability of my items.
Translated by Google TranslateDetails
Era
1900-2000
Brand
sans marque
Model
aucun
Physical condition
Excellent
Nr of items
1
Includes
+ Extra item (see description)
Weight
4 kg
Functional condition
Not tested
Height
20 cm
Width
18 cm
Depth
34 cm
Sold by
