While making the last Woden amplifier I wondered what an experimenter would do about the power and output transformers.

The options are to buy stock units, find substitutes that will do the job or make them.

A search of the internet suppliers showed that suitable units could be bought but at some great cost, anything up to $1000 for the pair.
Alternatively there are X TV power transformers from the valve era that could be used and there is a suggestion that standard line speaker transformers could be used.
I used this approach and decided to make a chassis that could carry a number of Valves and plenty of room for any sorts of transformers.

The aim will be to show how a valve TV transformer can supply around 400 volt HT to drive pairs of output valves and investigate the claim that the 100 volt line transformers will work to match valves to speakers in push pull mode.

The first step will be to make a general purpose chassis and mount up some transformers and output valves and see how they work together.

I have completed a part 1 covering the making of a chassis.

Part 2 is underway and as I find time I'll work on the project.


Fred.

Woden Amplifier - Part 1

Part 1 uploaded.