App note: Transformers

App note from Mini-Circuits on transformer types and some basics of them. Link here (PDF) The purpose of this application note is to describe the fundamentals of RF and microwave transformers and to provide guidelines to users in selecting proper transformer to suit their applications. It is limited to core-and-wire and LTCC transformers.  

Mullard 3-3 Amplifier project (part 2)

Dilshan Jayakody writes: This is a second article related to Mullard 3-3 Amplifier Project and in this article we introduce HT transformer and HT power supply related to this amplifier. As mentioned in previous post, power supply unit of this tube amplifier is constructed using 400V 5A bridge rectifier, 220µF (400V) and 82µF (400V) electrolytic […]

Calculator for audio output transformers

Dilshan Jayakody  writes:     Audio output transformers are heavily used in vacuum tube and some (older) transistor base audio power amplifiers, but these days output transformer are quiet hard to find and expensive item. For homebrew projects the best option is to construct those transformers by ourselves and this script helps to calculate winding parameters […]

Home produced 700VA isolation transformer

Dilshan Jayakody writes: This a quick post regarding homemade 300V – 2.3A isolation transformer. This transformer is a part of my ongoing 300V AC/DC variable power supply project and it’s boxed as a separate unit because of its heavy weight and size. All the parameters of this transformer are calculated using small Python script which […]

App note: Choosing the right transformer with the MAX13256

Here’s an application note from Maxim describing how to specify a transformer that meets your application needs: The MAX13256, a 10 Watt transformer driver, is an improved way to convey power across isolation boundaries. As with all transformer drivers, good system performance requires good transformer specification. Though many transformers can potentially work with the MAX13256, not all […]

Let the sparks fly with flyback transformers

Flyback transformers are used to drive the large odd shaped coils surround the neck of CRTs in TVs and computer monitors. They operate in the 15 to 150 kHz range, and can be used to generate high voltages! Uzzors2k decided to experiment with generating voltages high enough to produce arcs, driving the the transformers with […]