[AMPS] Henry 2K2

[Radiodan W7RF]

Hi Ian,

Do your thoughts on the negative lead or positive lead glitch resistor also
hold true for DC choke (choke input ps)?
+ or - OK, but with a greater need for insulation when placed in the
negative lead?


73, Dan Magro W7RF, (President WARC 1999, member SCDXC, SCCC)
Manufacturers Rep & Distributor for HENRY RF Power Amplifiers.
www.radiodan.com <http://www.radiodan.com>     RFpower@radiodan.com
<mailto:RFpower@radiodan.com> A trip to our web site is worth the click!




> -----Original Message-----
> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
> Behalf Of Ian White, G3SEK
> Sent: Tuesday, May 11, 1999 12:47 PM
> To: amps@contesting.com
> Subject: Re: [AMPS] Henry 2K2
>
>
>
> Picking up on one of Rich's remarks:
>
> >Henry's glitch-R in the neg. HV
> >lead is a mistake.   A glitch R should be added to the pos. HV circuit.
>
> It doesn't really matter which end of the HV circuit the glitch resistor
> and HV fuse are - unless the designer thinks that putting them in the
> negative return rail requires less insulation. In fact it requires
> *more* insulation, because a "crowbar" short from HV+ to chassis will
> tend to push the return rail down to *minus* the normal HV.
>
> To avoid breakdown, the negative rail and the negative end of the
> capacitor stack therefore need to be insulated to the same standard as
> the positive end.
>
> A certain line of amplifiers has the fuse in the return rail, with
> ordinary hookup wire running back to the capacitors through a hole in
> the chassis - not even a grommet.
>
> 73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
>                           'In Practice' columnist for RadCom (RSGB)
>                            http://www.ifwtech.demon.co.uk/g3sek
>
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>


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