[Amps] Fabrication & part placement

[kg7hf at comcast.net]

Thanks guys,

I'm trying to fit the 3cx800 into a stripped Dentron 2500 cabinet.  I would like to raise the tube up and put the base into a little pressurized cabinet that the blower will push air into, then have it vent up the chimney.   I was just a bit concerned about raising the tube up too close to the top of the cabinet.  I think there will be enough clearance though if all I need is an inch or so top and bottom.

Paul, kg7hf

-------------- Original message -------------- 
From: "jeremy-ca" <km1h at jeremy.mv.com> 

> Leave at least 1" and 2" preferably between any variable cap and coils from 
> sheet metal and especially any steel items. Otherwise you will have 
> coupling, detuning and wasted power. The Dentron Clipperton L is a prime 
> example of this as well as any of the Amp Supply "No Tune" models. 
> 
> Carl 
> KM1H 
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Colin Lamb" 
> To: ; ; 
> Cc: 
> Sent: Thursday, April 17, 2008 1:51 PM 
> Subject: Re: [Amps] Fabrication & part placement 
> 
> 
> > If you look at the plate tuning capacitor, you will see what the minimum 
> > spacking needs to be between the top of the tube and the cabinet. If it 
> > does not arc in the cap, it will not arc to the cabinet. Remember, 
> > however, that you 30 pound cat can jump on top of the top and deflect it a 
> > bit, so allow that. Normally, the air goes up, so the spacing for air 
> > will not matter too much. 
> > 
> > Or, you can use the rule of thumb. If you can put your thumb between the 
> > plate cap and the cover, that is more than sufficient. Except, how do you 
> > get your thumb in their with the cover on. 
> > 
> > And, of course, turn the high voltage off before sticking your thumb in. 
> > 
> > 73, Colin K7FM 
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> > 
>