RCA tube radios
I bought the below RCA AM/FM Bakelite in 1976
back in college at Syracuse Univ from a frat auction
for about $11. Its AM tuned RF stage helped bring
in WOLF 1490, a low powered AM on the other side of town.
RCA gave names to their radios back in the 1950s. This
one was called the "Lindsay". Just gave it a recap.
. RCA 9X571 - This radio was modified to operate
on 240VAC powerlines, and using a 50C6 output tube. Click
here for the description and schematics (2nd method, 50C6
option of that method). More audio output power.
Clock radio at above right was modified using three compactron tubes
in place of the usual AA5 tubes.
Click
here for a description and schematic diagram of this radio.
An RCA FM only: 
A few more RCA's, this one uses 100ma heater string AA5
tubes 
Unusual dial for an AA5. You see this style of dial more often
on transistor radios.
In the RCA 8X541, try using a 12SG7 in place of the 12SK7 in
the IF stage. Should produce twice the gain on weak signals.
Check for birdies and oscillations on weak ststions.
The RCA 8X541 has great style, and works good too. A
very popular radio when new, which may explain why it is
so common today.
This FM only 3RB16 uses a similar chassis as the RCA
3RC76 with the AM parts missing. 
RCA RZA200N
Realtone solid state "hot chassis"
Not old enough to be collectable yet!
:-)
This radio above uses no transistors unless you count the thousands of
transistors inside the two IC's used.
