[DEMI] Protecting pre-amps

[Chris Cox]

I usually leave mine on having read that same suggestion by (I think) Al 
Ward in the CSVHFS proceedings from Kansas City a few years back.  The 
reasoning was that the bias causes the threshold of damage onset to be 
raised.

I must admit that I haven't run them with switched power so how much of a 
real benefit there would be I don't know.

On Mon, 18 Mar 2002, Tree N6TR wrote:

> 
> I am working on my "foolproof" sequencing system for mast mounting a 
> couple of DEMI's preamps.  I seem to remember a discussoin where someone
> suggested that leaving the FETs biased on offered more protection against
> damage than leaving them off.
> 
> Since I am planning on running separate conductors for the preamp's power
> and the relays, I could leave them powered up when being disconnected.
> 
> Any thoughts or hard experiences to share?
> 
> Tree 
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-- 
73  Chris Cox  N0UK, G4JEC, ex-AB0CN, ex-G8PTC  RNARS #1157  EN34jv

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