21-05-2021, 07:02 PM
(This post was last modified: 21-05-2021, 07:06 PM by Murphyv310.)
Hi.
I was able to add two tag strips then realised this HT supply is for the RF, IF, Audio & Video output. The other supply is for the Line and Frame sections. The line and frame sections are switched off when on "Radio" so the rectifier originally is two selenium rectifiers wired as a doubler. so all I fitted was two silicon Diodes (1N5408) and the 150uf cap, I only had a 180uf so that will do in the meantime. The switch was O/C but I used the other set of poles as it was a double pole switch.
The mains socket is very ingenious as it has a little flap that houses the two 20mm mains fuses.... clever.
I slowly brought up the HT's to 150v, both supplies behaving perfectly and went through all the coupling caps and non were leaking at all, so much for our Wax cap crap.
Frome osc started at that HT even with half the heater volts, nothing from the line osc as yet though.
I've called it a day for now and wont be working on it till Monday. Oh and the Audio stage is working too.
A picture of the mains connector, the added rectifiers and cap (cap is temporary as I hope to get a more suitable replacement) and the HT at 50v
I was able to add two tag strips then realised this HT supply is for the RF, IF, Audio & Video output. The other supply is for the Line and Frame sections. The line and frame sections are switched off when on "Radio" so the rectifier originally is two selenium rectifiers wired as a doubler. so all I fitted was two silicon Diodes (1N5408) and the 150uf cap, I only had a 180uf so that will do in the meantime. The switch was O/C but I used the other set of poles as it was a double pole switch.
The mains socket is very ingenious as it has a little flap that houses the two 20mm mains fuses.... clever.
I slowly brought up the HT's to 150v, both supplies behaving perfectly and went through all the coupling caps and non were leaking at all, so much for our Wax cap crap.
Frome osc started at that HT even with half the heater volts, nothing from the line osc as yet though.
I've called it a day for now and wont be working on it till Monday. Oh and the Audio stage is working too.
A picture of the mains connector, the added rectifiers and cap (cap is temporary as I hope to get a more suitable replacement) and the HT at 50v
