[Boatanchors] amp internal shielding

[Glen Zook]

My Tempo 2001 didn't have any such shielding and there was a lot of r.f. getting into the AC power line.  Finally got rid of it with a lot more bypassing as well as a toroid on the power cord (right at the amplifier).  

Part of this kind of problem lies in whether or not the power transformer is encased in metal.  When there is a shield on the power supply there is considerably less chance of having problems.  My Tempo 2001 has an open frame power transformer.

Glen, K9STH

Website:  http://k9sth.com


--- On Thu, 11/13/08, BLIMPY <blimpboy at sonic.net> wrote:

From: BLIMPY <blimpboy at sonic.net>

most Grounded Grid  rf amps dont have shielding between the PA coil and the power transformers.

why would they need it ?
 
whole xfmr core is like a giant choke anyway.
 
distance is the deal...and some pretty nice amps have been made with precious little of that ( Ken TL-922 , Collins 30-L1  etc )