[Amps] 3CX1500A7/8877 vs el cheapo GS-35B

[MIKE DURKIN]

this isnt too close is it ??

<http://www.flickr.com/photos/kc7noa/4444845719/in/photostream/lightbox/>

> From: dezrat1242 at yahoo.com
> To: amps at contesting.com
> Date: Tue, 31 Jul 2012 19:44:41 -0700
> Subject: Re: [Amps] 3CX1500A7/8877 vs el cheapo GS-35B
> 
> ORIGINAL MESSAGE: 
> On Tue, 31 Jul 2012 18:45:05 -0700, Mike wrote:
> 
> >
> >Wha? No shield from input to output?
> >
> >Mike KC7NOA 
> 
> REPLY: 
> Also, I firmly believe if you're going to mount the plate choke that close to
> the anode(s) you should put a shield in between. There is parasitic capacitance
> between the tube and the choke that could set up unwanted resonances. Even
> without resonances, simple capacitive coupling between tube and choke will
> induce currents you really don't want. In one of my earlier designs I burned
> about a dozen turns on the choke just for that reason. 
> 
> Better safe than sorry. 
> 
> 73, Bill W6WRT
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