UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Elizabethan LZ-29

60 oldjohn · 25th Apr 2019, 11:27 pm

Have you got the circuit? if not its available top right of this page for £1.99. The rectifier should be bolted to the chassis, it acts as a heat sink. Where the circuit points to 270 near MR1 that wire need cutting and a resistor inserting, maybe 200 ohms 5W also bolted to the chassis to dissipate the heat. Exact value not critical but should be chosen to get near the 270V indicated. Once you have that sorted consider changing MR2 in the magic eye circuit an ordinary Silicon Diode, the 100k resistor may need increasing.

John.

25th Apr 2019, 11:27 pm	#8
60 oldjohn Dekatron Join Date: Dec 2004 Location: East Yorkshire, UK. Posts: 3,988	Re: Rectifier Have you got the circuit? if not its available top right of this page for £1.99. The rectifier should be bolted to the chassis, it acts as a heat sink. Where the circuit points to 270 near MR1 that wire need cutting and a resistor inserting, maybe 200 ohms 5W also bolted to the chassis to dissipate the heat. Exact value not critical but should be chosen to get near the 270V indicated. Once you have that sorted consider changing MR2 in the magic eye circuit an ordinary Silicon Diode, the 100k resistor may need increasing. John. Last edited by 60 oldjohn; 25th Apr 2019 at 11:37 pm.