CS>C/S generators

[Gary Robertson]

Hi 
  I am a pigeon fancier in the north east of England I used C/S a couple of 
years ago 'I bought a generator from Dazer u.k I was very pleased with it until 
I got a new silver rod put in by Dazer u.k.After this it did not have the same 
effect is this because they may have used an inferior silver rod or could there 
be another explanation 
regards
Gary