P-326 Russian Receiver
This
receiver is a work of art! VERY heavy duty. 1-20MHz with
a very clever "projection"
frequency readout. Two speed tuning dial. Continuous selectivity from 300hz
to 6Khz.
Audio out is 600-ohms. Utilizes 19 miniature tubes with wire leads. The receiver
can be
powered from an external AC supply (see below) or from NiCd battery packs.
One
interesting curiosity ... no volume control, only IF gain.
Front
panel after cleaning and replacing the Antenna connector with a common SO-239.
Amazingly the hole pattern was identical to the original connector.
A
separate power supply is used. Note the massive heat sink on the top of the
PS.
Some
interior views follow. Everything is housed is aluminum castings!
You can see some of the miniature tubes in this view.
Tuning
capacitor surrounded by another massive casting.
Rear
view of chassis
View
showing how heavy the support castings are - this receiver is not a light-weight!
Rotating
bandswitch sections
Tuning
for the continuous bandwidth control.
Two geared variable caps synthesize a differential arrangement
P-326
with front cover in place
P-326
power supply after cleaning and painting
Front
panel controls:
(1) Scale illumination
on/off - (2) Antenna connector - (3) ?? (4) IF gain - (5) 600-ohm audio
(6) Ground - (7) 600-ohm audio - (8) Selectivity (300-6Khz) - (9) Bandswitch
(10) 2-speed main tuning - (11) Mode select, AM/CW, variable BFO/CW, fixed
BFO/"correction"
(12) AGC, Off/AM/CW-SSB
- (13) BFO adjust - (14) BFO calibrate - (15) BFO scale
(16, two places) Dial and oscillator adjusters - (17) Khz dial
This
switch selects one of two lamps that illuminate the Khz dial (very clever!)
This
switch selects AUX - OFF - AC on
