[BC] Older transmitters

[Wade Giddens]

This Harris SX-5A was destroying transistors, which were relatively 
expensive.  The problem was solved by replacing the older style PA modules 
with the updated version.  They use a different transistor, which is far 
less expensive.  We also repaired a couple of PA toroid boards by replacing 
two or three toroid cores which had broken.  The transmitter has been doing 
quite well since then.

>
>
>There was another discussion about replacing transistors and possible
>substitutes.  That is the real problem with older solid state TXs, but
>if you are aware of the situation and stay on top of it, it is not as
>bad as the situation with tubes.  How the TX has been maintained is also
>a very big factor.
>
>R
>
>
>Wade Giddens wrote:
>
> >
> >
> >> From what I've seen of the discussion here on this topic, the focus
> >> has been
> >
> > on tube-type transmitters.  What about older solid-state
> > transmitters?  We are using a Harris SX-5A that is 22 years old.
> >
> >