Many years ago in the 1970`s I ran 4-1000A amplifiers on the Low Bands.I
have a neighbor who has fluorescent lamps on his front porch and my SSB
modulation would make the lamps talk..Literally...And flash...I had very
good grounding and still had issues...Nowadays I run YC-156A amps and no
problems of any kind...Very clean tube when set-Up and run properly. Ground
Loop is also a common problem for several Hams,follow advice from
Engineering people and solve your issues easily...Hello all&73..Jim..K7RDX..
On Wed, Feb 5, 2020 at 3:08 PM Steven Katz <stevek@jmr.com> wrote:
> The Hercules II uses a separate 14V 80A power supply and the
> interconnecting DC power cable is hot as hell, in my experience -- having
> owned one back in the 90s.
>
> Big difference between that and the self-contained SB-230.
>
> Steve, WB2WIK
>
> -----Original Message-----
> From: Amps <amps-bounces@contesting.com> On Behalf Of Alek Petkovic
> Sent: Wednesday, February 5, 2020 2:47 PM
> To: amps@contesting.com
> Subject: Re: [Amps] Amp causing RFI new attempt on the original request
>
> From 1-5 on grounding, in the Ten Tec maual.
>
> "In the interst of personal safety and to reduce the possibility of stray
> RF pickup on interconnecting cables, all station equipment should be well
> grounded to earth. It is important to strap all equipment chassis together
> with short heavy wire."
>
> The SB-230 may not be as susceptible to problems, as the Ten Tec, when it
> comes to grounding.
>
> If you are getting stray RF back into the driving transmitter, then this
> will be amplified and may cause any number of problems, including the Uncle
> Fester light bulb effect.
>
> 73, Alek. VK6APK
>
>
> On 6/02/2020 1:38 am, Henk Remijn PA5KT via Amps wrote:
> > I think this is an interesting question which deserves a better answer
> > then the ground loop discussion.
> >
> > The Tentec is a solid state amplifier and the SB220 is using tubes.
> >
> > In general tube amps are more lineair then solid state.
> >
> > I would try to measure them on a spectrum analyzer to see if there is
> > a different in produced spectrum.
> > Based on that you might consider an additional filter on your amplifier.
> >
> > Most likely the cheapest solution is some kind of ferrite around the
> > wires of the light.
> >
> > 73 Henk PA5KT
> >
> > Op 28-1-2020 om 17:37 schreef Gary Hendricks:
> >> I have a Tentec Hercules II amplifier. When I am on 40 meters only it
> >> sets off my neighbors outside motion light. I know these lights are a
> >> problem, but what has me concerned is when I run my old SB-230 at the
> >> same power level his light does not come on.
> >> Do you think this indicates some purity issues with the Tentec amp?
> >> Maybe something in the VHF range?
> >> I wonder if an old fashioned low pass filter might help. Any ideas?
> >> Gary K4MT
> >> _______________________________________________
> >> 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
> _______________________________________________
> 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
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|