[Allister]

Hi Scudie

I will publish whatever I do if it works. All this depends on information. I could go through the box and draw a schematic but I am hoping it is in the manual. I am told it is so this saves a lot of work. I think the one I have has been modified by somebody else. This unit is a wireless unit but it has 2 wires coming out with this switching to ground. Therefore when I get the manual I will know what has been done to it. I have the new tubes (64C) coming and the will get the oscillator going. The voltages are there  HT and the 6.3 heaters. However this part of the circuit is no longer used so will be just for fun really. I can only see one resistor which is about 240 ohms there is a coil there and a filter capacitor. So if I get the circuit I can check it out and get it working. I should have any other components in stock if required.

 

Allister Denyer

[Allister]

Hi RandyWell I have it producing the 6 to 25 pulses sequentially.It had 2 broken wires. Now this unit switches to ground which is not like the 3 wire system. However, by putting it through a small relay and a 1nF capacitor on the output I can get a nice isolated switching square wave. I tested with 12V DC but I can put 24V AC through it and we would have an isolated switched 24V AC set of pulses. As the switching rate is quite slow a small relay is fast enough to work. The signal current will be very small. The only big difference I can see between the 2 wire and the 3 wire is that the switching is independent of ground. This solution should fix that. If the relay was not fast enough I could use a diac and triac to switch the 24V faster. But the relay seemed to operate with no problems.
Also because the 24V AC would be completely isolated using a 120V to 24V transformer you could make the whole unit as a switch and leave the common as a separate return. All I am basically concerned about is, Will the 6-25 sequential code be recognised by the Wallbot2mp3 adapter, if it will  I can provide whatever signal conditioning is required. From what I have learned so far the 3 wire system only means that the switching is isolated from ground. This is why I wanted the manual to see if it could be isolated from ground easily. I would also have liked a diagram of the Wallbox2mp3 unit to see the input circuit for the 24V AC. If it was rectifying it I could simply use a DC.supply.

Yours

Allister Denyer

[Allister]

Hi Scudie
It does say on the wall box2 mp3 site that it is compatible with L56 wall boxes with 20 selections and it is listed in the software. So all. I need to do is check the coding in the manual I have ordered. But the coding I have checked on the scope with 12VDC and a 1k pull up resistor is very simple 5 pulses added to the selection. So 1 is 6 pulses and 20 is 25 pulses. I may need to do some signal conditioning as the adapter appears to use switched 24V AC. The unit seems to switch the signal to common. I am getting 2 x 6C4’s to see if I can also get the 250KHz oscillator going again. I don’t think the adaptor actually needs this. I received the unit with the tubes missing. It would be nice to know what kind of input signal the adaptor is actually looking for. There is no schematic for the adaptor in the manual. I am aware that different makes and types code differently.
Any information would be helpful.

Yours
Allister Denyer

[Allister]

Hi there

Is this site still operating .

I would like to know how to get the software to run your MP3 adaptor for a W1-L56

 

Yours

Allister Denyer

[Author]

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