Onoff

Screw Archimedes I say.

Be handy for spotting the Meibion Glyndŵr neighbours with burning torches...

I love when I phone the UK arm of a company with a "global presence", "Yes, we have X of them in stock!" Then that's on a 5-7 day delivery from Cincinnati. No f***ing good if I want tomorrow is it!

In the head?

No it doesn't. Stop being a c***

"Unbalanced" ??? Reminds me that Round The Horne sketch. "My Lords, Ladies and gentlemen. Master Of The Hunt, stable boys, unstable boys!"

They're better men than me! ?

Is perhaps the 0-15v transformer not a high enough voltage to start with? Then: As I read it there's a minimum voltage differential of 3V needed. I've 5Vdc out of the bridge rectifier and R1/R2 are set up to give Vout as over 12V. So a circa 7V differential. (I have btw the 317T not 317N). Thinking to sling in a 0-24V trannie and see what gives.

Credit where it's due, throughout this thread he's not been shy of showing his cock ups.

In this photo, top right, at the back is the green supply LED. That's now coming on whereas it wasn't before. That is it's coming in even with these low DC voltages. The vertical boards to the right are essentially the channel generator I think and the right hand side, around the regulator crates the 8.2vdc that goes down pin 6. The other wire for the 2 wire comms is pin 3. In my application it's just supply to A1/A2 and then 2 wires from 3 & 6. I should be measuring I think 8.2vdc across 3 & 6. I'm measuring 1vdc only. (Pins 2 & 4 not used).

Yep, I know Radwell and am aware of that option.

The two ICs in the foreground, in front of the regulator are 7612 op amps.

On both the + & - output of the unit is a chunky resistor. Both look a bit brown but both measure at 5.6 Ohm. It holds with me thinking it died as the output was shorted.

(22vac as aforementioned on the secondary, nothing connected, just applying 230vac on the bench). Transformer soldered in. Applying 230vac to A1 & A2, nothing connected to the output of the actual unit: 7vac across the secondary 5vdc direct from the bridge rectifier.

New 15VAC transformer fitted. Off load it measures nom 22VAC on the secondary. I've renewed the 4 diodes of the bridge rectifier, Cin the 1000uF cap and the voltage regulator. Applying power and measuring between Vout and ground and I'm seeing 4VDC. I calculated that should be just over 12VDC with the current values of R1 and R2. So what's pulling it all down I wonder... On the output of the unit itself I'm only seeing 1VDC...where I'm expecting around 8.2VDC. Pretty sure the output of this unit saw a prolonged short to ground which is what cooked the trannie in the first place.

The Queen's Gambit is very good.

Check the original French Banlieue 13 .You might change your mind. Blue Is The Warmest Color too.

Are you friends with Dorothy?

Won't be any of mine then! @zoothorn, this balancing lark is a real thing. People aren't just saying for a laugh. Picked at random but try this: https://www.bestheating.com/info/a-best-heating-guide-how-to-balance-radiators/#:~:text=When you balance radiators%2C you,then your radiators need balancing. As for a temperature measuring device you can pick up a multimeter with temperature probe like in the guide above for about a tenner.

@zoothorn could you in some way harness the heat from the bridges you keep burning? ?

Like a train wreck you can't take your eyes off! ?

All the ribbing was in jest! (Payment in kind as per usual please ?)

Looks pucker that!

Agreed. Even in my as yet unheated bathroom the tiled floor is oddly not particulary cold underfoot.