The tuning gang (or permeability) is the dead giveaway as to what should be: Superheterodyne.

If there are two gangs, they will be antenna and oscillator.
If there are three gangs its lead by a TRF stage then a second antenna stage on the frequency changer, plus another for the oscillator.
If there a four gangs there is likely a TRF stage then the antenna stage and the other two, a Colpitts oscillator.

The biggest fall downs are not synchronising the Antenna stages and overloading the IF when calibrating.

Colpitts oscillator is not for the unwary.

Marc

A quick Trove Newspapers check suggests that "Cavalier" is the house brand for "Winns Limited" of Oxford St.

https://trove.nla.gov.au/newspaper/article/229199041/24574487

On the A battery lead there is a thin prong and a thick one. Which is the negative? Two wires are the same colour.

With the 1.5V A Battery connection, The larger diameter pin is the positive.

Could this radio be a Crosby Personal Portable C100, made by Crosby Radio in Greenwich Sydney?
Same valve lineup with 2 X IF stages and a loop antenna. The circuit refers to a 1S5 and later sets used 1R5.
A circuit is on Radiomuseum, but no picture.
Harold

Just noticed this on a set arriving today.
One of the aluminium/Bakelite portables.
Prior to ferrite it appears necessary to amplify the incoming signal from the tuned frequency prior to mixing.
I never noticed this on any consoles, I assume because they can have a long wire antenna.

I guess it's a lot more fun for the designers getting the tuning gang lined up with the dial face scale!

On sussing out my Radiomarrelli I noticed it has three I.f cans on top and what looks like another underneath the Chassis!

I do think that that it may be what the Americans call a farm radio. The TRF stage is of great benefit to the mixer /frequency changer.

It can be followed by the first IF can coupling to the first IF tube; Then the second IF can coupling to the First IF. That normally has three gangs. As will a set with no TRF and a separate exciter (osc) tube,

If it has two gangs, then you will likely have no TRF stage and can have perhaps double conversion. One needs to study it in a little more detail and perhaps try and find out who actually built it. Re-badging was rife and Airzone was one that build sets & bits for others.

You do have to be careful with LV filament tubes. The filaments are carrying the Cathode current and heating current. Many Regulators like LR8, 78xx and 79xx. do have to be drawing a specified current. If not (open circuit output) they will lose regulation, which may be devastating to a filament that gets a surge voltage.

Initially think on what marked it was aimed at. E.g. High end retailer.

Marcc