Connecting a 370bx-transformer (Cornet)

renton1 · « **on:** 15 Apr 2004, 08:38 am »

Hi,
I´m an absolute beginner in tube-amps and have bulit a cornet as my first one. The only thing left is connecting the transformer. I don´t understand the schematics on it. Can anyone please tell how it should be connected to run the preamp at 220 to 240 Volts?
Many thanks and best wishes,
Ralf

mgalusha · « **Reply #1 on:** 15 Apr 2004, 02:10 pm »

Ralf,

According to the Hammond web site the connections are as follows:

220V primary

Line -> Blue/Yellow
Neutral -> White

Connect the Brown to the Black/Red.

All other leads are unused and should be insulated.

240V primary

Line -> Blue
Neutral -> White

Connect the Brown to the Black.

All other leads are unused and should be insulated.

The diagram is located at: http://www.hammondmfg.com/300series.htm - scroll to nearly the bottom of the page.

Hope this helps.

mike g.

library · « **Reply #2 on:** 15 Apr 2004, 04:03 pm »

Try to look at the schematics at hammond home page. I am running my nval cornet at 210V.