Recent content by Radioman

Tony, I disconnected the thermostat and the signal was still there. Apparently the stat appears to have mains running into it! What a crap design. If you can give the values for the components I would be very grateful. I agree though I don't think the filter will be very effective as you...

Yes, I note L1 C20, C22 and C23 all missing!! What was that saying about some tar? I cannot get the board part no. as the poxy plastic lugs at the back near the hinge refuse to let me take it off despite removing the two screws. That's why we hate designers and their project managers...

Tony, On another forum (4m website) they tell me that the valve modulating circuit may well be thyristor controlled referenced to neutral. Since I have pme earth arrangement I guess I have got radiated AND conducted interference. Not bad eh! May be their designers should work for HMG in...

I think in the last few years before CE really got going their was a rather cavalier attitude to EMC by the manuafacturers. There must be lots of Hams with this and I have asked the RSGB EMC committee if they know of a fix. Fortunately (?) there are no other hams near me and the interference...

Thanks for that Tony. I will try disconnecting the thermostat cable (nice antenna NOT!). If I can locate on the board where the dc power runs in I could get a linear psu and feed from that instead perhaps. Then I will discover its the on board circuitry... Might be time to get a new...

Agile, you know your onions obviously and I appreciate your input. Well I haven't tried disconnecting the thermostat yet but I did put 5 ferrites on that cable. The ferrites are the ones about 1/2 inch diameter, 1/3 inch long, clip on style. Result: nothing and as you predicted. I don't...

Yes, so much for BS EN 55011 then. Baxi hang your head in shame. And just how did you get a CE mark then......?

Thanks for the suggestions. I have placed a substantial ferrite on the mains input. I suspect that the 15kHz (and it seems to be exactly that) is the cycle time for the switch mode psu on the control board. I await some more ferrites from Maplin to put on the line to the thermostat which...

If anybody knows how to cure the radio interference from a Baxi 105e (about 3 years old) I would be forever in their debt. Details: emits intereference peaks every 15kHz on 14MHz band. I don't know whether the newest control board does this (P/N 5112380)

If anybody knows how to cure the radio interference from a Baxi 105e (about 3 years old) I would be forever in their debt. Details: emits intereference peaks every 15kHz on 14MHz band. I don't know whether the newest control board does this (P/N 5112380)

If anybody knows how to cure the radio interference from a Baxi 105e (about 3 years old) I would be forever in their debt. Details: emits intereference peaks every 15kHz on 14MHz band. I don't know whether the newest control board does this (P/N 5112380)