[AMRadio] Re: High Voltage Power Supplies


bcarling at cfl.rr.com bcarling at cfl.rr.com
Sun Nov 6 16:32:39 EST 2005


Thanks

On 31 Oct 2005 at 13:00, ne1s wrote:

> This part sounds like an inrush limiter, not a transient suppressor. They 
> are useful to prevent inrush current stress of tube filaments, and may also 
> be a good idea for HV supplies, especially capacitor input. 
> 
> Digikey carries them - the Digikey part number for the CL-30 is KL003 - 
> something. 
> 
> The CL-80 is useful to prevent the power microswitch from welding closed on 
> your R-390/R390A (Jan Skirrow whote this up - it's somewhere on the web). 
> 
> 73,
>  -Larry/NE1S 
> 
> bcarling at cfl.rr.com writes: 
> 
> > Noit sure Don - a fellow ham traded these to me.
> > They are black disks and look pretty much like a large 
> > ceramic capacitor, if you can imagine... 
> > 
> > They are marked:
> > STM  and  CL-30 
> > 
> > I think the resistance at rest is about 3 to 5 ohms. 
> > 
> > On 30 Oct 2005 at 9:24, Rev. Don Sanders wrote: 
> > 
> >> OK Bry, You got my interest. What is the part number and are they from
> >> Mouser? I know I need several for my boatanchors and my 2 Astrons(20 and 35
> >> amp). 
> >> 
> >> Healthfully yours,
> >>                           DON W4BWS
> >> ----- Original Message ----- 
> >> From: <bcarling at cfl.rr.com>
> >> To: "Discussion of AM Radio" <amradio at mailman.qth.net>
> >> Sent: Sunday, October 30, 2005 7:27 AM
> >> Subject: Re: [AMRadio] High Voltage Power Supplies 
> >> 
> >> 
> >> > On 30 Oct 2005 at 9:08, Ed Swynar wrote:
> >> >
> >> > > Is this the reult of transients / voltage spikes somehow "overwhelming"
> >> > > the diodes...?
> >> >
> >> > Probably - why not try one of those transient suppressors (varistor I
> >> think)
> >> > on the primary side of your power tranny?
> >> > I just put one in my Astron 35M and it eliminated the "THUNK!"
> >> > at power-on.
> >> >
> >> > A number of guys have put them into Johnson xmtrs with similar
> >> improvement.
> >> > Maybe it could save your diode strings.
> >> >
> >> > Do you have a capacitor-input filter on the p.s.u.?
> >> > Choke input filters tend to be a bit kinder to the rectifiers.
> >> >
> >> > 73 de AF4K, Bry
> >> >
> >> > ______________________________________________________________
> >> > AMRadio mailing list
> >> > Home: http://mailman.qth.net/mailman/listinfo/amradio
> >> > Help: http://mailman.qth.net/mmfaq.html
> >> > Post: mailto:AMRadio at mailman.qth.net
> >> > AMfone Website: http://www.amfone.net
> >> > AM List Admin: Brian Sherrod/w5ami
> >> > 
> >> 
> >> 
> >> ______________________________________________________________
> >> AMRadio mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/amradio
> >> Help: http://mailman.qth.net/mmfaq.html
> >> Post: mailto:AMRadio at mailman.qth.net
> >> AMfone Website: http://www.amfone.net
> >> AM List Admin: Brian Sherrod/w5ami
> >  
> > 
> > ______________________________________________________________
> > AMRadio mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/amradio
> > Help: http://mailman.qth.net/mmfaq.html
> > Post: mailto:AMRadio at mailman.qth.net
> > AMfone Website: http://www.amfone.net
> > AM List Admin: Brian Sherrod/w5ami
>  
> ______________________________________________________________
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> AMfone Website: http://www.amfone.net
> AM List Admin: Brian Sherrod/w5ami





More information about the AMRadio mailing list

This page last updated 22 Oct 2017.