[Amps] RE: Amps Digest, Vol 3, Issue 59

[Bill Fuqua]

         The whole point is legal operations. Very few ham or for that 
matter NO CB operator needs to be concerned with
filament currents over 30Amps.  You don't need more than 30 Amps filament 
current in an amplifier that will
produce the legal limit. However, a few hams do use larger tubes and 
operate them well below specs and run the
legal limit.  Some years ago the legal limit for most modes was half what 
it is today and hams ran used 4-1000 tubes
that had reduced emissions to make legal limit amplifiers.
         A CBer has no use for a filament that draws more than 30 amps in 
an amplifier because he can't legally own
an amplifier much less use it.  Frankly, I mostly find them to be no more 
than a minor nuisance on this list.
         You could make it a list where people must meet certain 
qualifications to participate. But, it would be a real problem for those 
that screen them. Legal users of amplifiers are:

Hams
Broadcast transmitter operators and technicians  ( you really don't need a 
license to do this anymore)
Persons working in legitimate research facilities.  ( plasma generators, 
particle accelerators, NMR, mass spectrometry ......)
Technicians that work with certain medical equipment (MRI, various cancer 
treatment devices)
And I am sure there are others.

But what really gets me is all the ads on ham trader list (QRZ list server 
and others) that obviously are selling CB linear amplifers and 
those  posting are obviously not a hams.

And the other thing that I find really objectionable are hams that assist 
CBers build amplifiers, build them for CBers , or them selves operate out 
of band as illegal radio operators ("freebanders").

73
Bill wa4lav


At 02:51 AM 3/15/2003 -0800, rlm wrote:
>Good point, Art.  Few Hams have experience with tubes that draw over
>30A of filament current.  My guess is that there are currently more CB
>amp builders who have experience in this area than Hams.