Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ncusack on August 24, 2017, 08:14:26 am

Title: Power transformer without endbells location?
Post by: ncusack on August 24, 2017, 08:14:26 am

Hello,


I'm wondering if a power transformer that doesn't have endbells like a Hammond 261g6 needs to be housed inside the chassis or if it's ok to mount it on the outside?

Title: Re: Power transformer without endbells location?
Post by: kagliostro on August 24, 2017, 08:29:20 am

If you have the transformer outside, the chassis acts as shield between the transformer and the circuit (that is inside)

if, on the contrary, you put the transformer inside the chassis there is nothing that acts as shield between the transformer and the circuit

Hiwatt used PT & OT without bells and shields on preamp tubes (but theyr chassis are very large, plenty of room)

(http://i.imgur.com/jr62Tli.jpg)

Franco

Title: Re: Power transformer without endbells location?
Post by: PRR on August 24, 2017, 09:07:49 pm

Hammond 261g6 is OK outside the chassis. But not where your kids or cats will poke sharp metal at it.
(http://www.mouser.com/images/hammond/lrg/262f6_b.jpg)