 |
Internal view of the chassis from the
top view. You can see on the left the FM group (ECC84 & ECF80) and
on the bottom right the little power autotransformer. In these cheap receivers
this component was used often in order to obtain a smaller chassis. |
| Rear view of this receiver. On the bottom
left you can see a missing dial scale lamp. I don't know why but during
the last restoration (Not made by me..) someone removed not only the lamp
but the lamp holder too, cutting the wire directly inside the chassis...!! |
 |
 |
Front view of the chassis just removed
from its wood cabinet. You can note the perfect conservation state of the
tuning scale with its band (AM and FM) and the four knobs. As a typical
construction the left one is the ON-OFF switch and volume control. The
window in the top left corner of the tuning scale is the magic eye window. |
| Bottom view with all the components. The
MF-AF group is located in a different box on the top of the chassis, the
rest of the circuit is developed under the metal ground. The big orange
capacitors are the Geloso "dry" electrolitic capacitors used as anodic
filtering. |
 |
 |
Detailed view of the metal label in the
bottom left of the receiver. Present in all Geloso receivers this plate
was used to indicate the nominal operational voltage, the frequency usage,
the model identification but more important all the tubes used in the chassis. |
| Enlarged view of the tuning indicator
(Magic Eye) type DM70. This cheap and little tube was used to indicate
the exact tuning of the choose station. The dimension of the esclamation
point depens directly from the ACG voltage, so more is the power of the
received station more is its lenght. |
 |
 |
This is an enlarged picture of the tuning
indicator (magic eye) type DM70. This little tube works only with four
wires, and a low anodic voltage (80V about).It was used specially in many
Geloso receivers and tape recorders. One of this, the Geloso G255, is part
of my collection and can be found in the main collection page. The green
area of this tube is the plate of the triode. Just modifying the grid voltage
was possibile to obtain a greater o smaller lenght of the esclamation point,
this in order to indicate the correct tuning or recording volume. Due to
its high input impedance the magic eyes grid can be connected directly
to the AGC circuitry without any signal loss or distortion. |
