UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 'Beau Decca 131 projection receiver 1950'

Heatercathodeshort · 4th Oct 2015, 5:03 pm

Hello Jac,
Thanks for those internal pictures of the ringing choke/tripler. Absolutely fascinating! I knew what was inside but never opened one up. I knew the EY51s were smaller than the standard type and of high grade manufacture.

270m/a of heater power required for those. I would imagine that fitting some high voltage silicon rectifiers would cure the uncertain regulation that struggled to cope with fast changes of brightness.

I did fit a colour tripler to a Philips 1800 about 20 years ago. The picture was superb.
Regards, John

4th Oct 2015, 5:03 pm	#7
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Philips 25kv EHT unit. Hello Jac, Thanks for those internal pictures of the ringing choke/tripler. Absolutely fascinating! I knew what was inside but never opened one up. I knew the EY51s were smaller than the standard type and of high grade manufacture. 270m/a of heater power required for those. I would imagine that fitting some high voltage silicon rectifiers would cure the uncertain regulation that struggled to cope with fast changes of brightness. I did fit a colour tripler to a Philips 1800 about 20 years ago. The picture was superb. Regards, John