The collection as of 4/14:
Please DO click on each picture, they display so much better…..
The wooden box on the wall at the right contains a 3KW isolation transformer with variac and ammeter. This increases safety at the bench and allows me to bring things up slowly whilst keeping an eye on the current draw. The size of the transformer allows me to run many items of test gear while working on a project, I do sometimes have two 500 series scopes on at the same time.
Note that the Bush radio is not the ubiquitous DAC90 but the quite rare AC91. This one was made in 1947. The differences are that the AC91 has an auto-former in place of a dropper resistor for the heater chain and a short wave band in addition to the long and medium wave bands. The auto-former is a far superior solution that dissipates much less heat which may be why the back is still in place! It also permitted me to set it up for operation on 120V by a simple tap change. Here is the schematic:
I have posted on the use of this radio with a two-valve am micro-transmitter here: