I recently complete yet another EL34 SE. Problem is that the Hammond power transformer and choke have a severe mechanical vibration. This vibration can be felt throughout the chassis and well as on the opts (via mechanical coupling). The result is an audible 50Hz/60Hz hum on the speakers that can be heard from a meter away. What could this mean? Is my power transformer and choke saturated?
The transformer is 375CT @ 200mA. My current draw is all within limits. My PSU is a CLC filter rectified by a 5U4G. The first cap is a 5uF Solen followed by a 10H hammond choke and then a 100uF panasonic (at 1000V). The supply provides 420V for the EL34's and 290V for the 6SL7. The power transformer in question had been in another amp that had an electrolytic leak with fumes (yuck).
Any suggestions would be helpful and I would also go buy a new transformer if I had to. What do you think it is?
The transformer is 375CT @ 200mA. My current draw is all within limits. My PSU is a CLC filter rectified by a 5U4G. The first cap is a 5uF Solen followed by a 10H hammond choke and then a 100uF panasonic (at 1000V). The supply provides 420V for the EL34's and 290V for the 6SL7. The power transformer in question had been in another amp that had an electrolytic leak with fumes (yuck).
Any suggestions would be helpful and I would also go buy a new transformer if I had to. What do you think it is?