> I have three amps ....SB200 , SB1000, Dentron Clipperton L ..... They all
>work fine ,But the SB1000 & Clipperton both have Transformer Buzz & hum. The
>SB200 transformer is super quiet ..... Why is that ?? What is heathkit
>doing that the other are not ?? Can I do anything about it......
In the SB-1K, more than half the noise seems to be coming from the steel
cover, vibrating in the stray magnetic field. Changing to a non-ferrous
cover would probably help.
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'