UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Solid State Vibrators -v- Inverters ?

G6Tanuki · 6th Sep 2019, 2:33 pm

I always think of the vibratior-type PSU as a specific subclass of SMPS.

The solid-state inverters I came across in things like Pye Vanguards always operated at high-ish audio-frequencies - 400Hz to 1KHz - they whistled rather than hummed. With suitable design this means you can use a physically-smaller/lighter transformer but you also need to use suitable 'fast' diodes - an 1N4007 is _not_ a good idea at 1KHz!

A while back I experimented with an old vibrator-transformer and a pair of 2N3055 in a classic Royer-style circuit, but it didn't work as well as building a new transformer using a colour-TV LOPT as the core.

6th Sep 2019, 2:33 pm	#16
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,996	Re: Solid State Vibrators -v- Inverters ? I always think of the vibratior-type PSU as a specific subclass of SMPS. The solid-state inverters I came across in things like Pye Vanguards always operated at high-ish audio-frequencies - 400Hz to 1KHz - they whistled rather than hummed. With suitable design this means you can use a physically-smaller/lighter transformer but you also need to use suitable 'fast' diodes - an 1N4007 is _not_ a good idea at 1KHz! A while back I experimented with an old vibrator-transformer and a pair of 2N3055 in a classic Royer-style circuit, but it didn't work as well as building a new transformer using a colour-TV LOPT as the core.