Because that's how it's been done for
over a century ... Engineers don't get
bonus points for creativity, only the
Scientists !!
73, Dick, W1KSZ
On Sun, Apr 9, 2017 at 7:20 PM, Bill Turner <dezrat@outlook.com> wrote:
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
> On Mon, 10 Apr 2017 01:54:42 +0000 (UTC), Catherine wrote:
>
> >My SB-220 still has Eimac tubes in it. I suspect they are the 40
> year-old originals, though I cannot prove it. Tubes should last a very
> long time in routine amateur service.
>
> REPLY:
>
> Tubes are notorious for becoming gassy due to air leaks and for
> internal arcing, neither of which transistors do.
>
> There is a reason tubes plug into sockets instead of being hard wired
> like transistors. Take a guess.
>
> 73, Bill W6WRT
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|