UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - BRY39

Argus25 · 12th Nov 2017, 2:20 pm

Rather than using a UJT or a PUT, I think its better to wire a PNP and NPN transistor together to make a PUT. This was done to create the vertical oscillator on one of my vintage computer monitors. Also I have a Conrac video monitor that uses a UJT as the vertical scan oscillator.

At least if the PUT is made from two common garden transistors, its easy to repair/replace it.

Becoming even more obsolete and oddball than the UJT is the CUJT, or complimentary UJT, I have yet to lay my hands on one, a type number is the D5K1.

12th Nov 2017, 2:20 pm	#14
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: BRY39 - Solid state switches. Rather than using a UJT or a PUT, I think its better to wire a PNP and NPN transistor together to make a PUT. This was done to create the vertical oscillator on one of my vintage computer monitors. Also I have a Conrac video monitor that uses a UJT as the vertical scan oscillator. At least if the PUT is made from two common garden transistors, its easy to repair/replace it. Becoming even more obsolete and oddball than the UJT is the CUJT, or complimentary UJT, I have yet to lay my hands on one, a type number is the D5K1.