; From: [EMAIL PROTECTED] [mailto:amradio-
> [EMAIL PROTECTED] On Behalf Of Ed Swynar
> Sent: Sunday, October 30, 2005 10:07 AM
> To: Discussion of AM Radio
> Subject: Re: [AMRadio] High Voltage Power Supplies
>
> Hi Jim,
>
> Many thanks for all the info!
>
> Well, mine i
DON W4BWS
> > - Original Message -
> > From: <[EMAIL PROTECTED]>
> > To: "Discussion of AM Radio"
>
> > Sent: Sunday, October 30, 2005 7:27 AM
> > Subject: Re: [AMRadio] High Voltage Power Supplies
> >
> >
&
rade" the silicone
> string with some of the newer, more robust chunks of silicone that were
> simply unavailable 30-odd years ago...
>
> ~73!~ Eddy VE3CUI - VE3XZ
>
>
>
>
> - Original Message -----
> From: "Jim Candela" <[EMAIL PROTECTED]>
&g
> To: "Discussion of AM Radio"
> 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 "overwhe
Maybe you need a higher PIV rating for your diodes. Should be at least 10
kv.
73, Ed Richards, K6UUZ
Simi Valley, California, 93065
Home of Air Force 1 Pavilion
On Sun, 30 Oct 2005 09:08:11 -0500 "Ed Swynar" <[EMAIL PROTECTED]>
writes:
> 'Morning All,
>
> I'm curious as to why I have to replace
Typo, Those diodes I mentioned are both 1000 volts
PIV. I incorrectly stated 100 volts.
1N5408 Data sheets:
http://www.datasheetcatalog.com/datasheets_pdf/1/N/5/4/1N5408.shtml
1N4007 data Sheets:
http://www.datasheetcatalog.com/datasheets_pdf/1/N/4/0/1N4007.shtml
Article about reverse breakdown
of AM Radio"
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 no
Ed Swynar wrote:
Hi Jim,
Many thanks for all the info!
Well, mine is the "classic" late 70's era string of 7 diodes per leg, each
paralleled with a resistor / disk capacitor combo. The transformer is,
indeed, centre-tapped, & the design is full-wave rectification, the output
of which goes dire
AM Radio" ;
<[EMAIL PROTECTED]>
Sent: Sunday, October 30, 2005 9:42 AM
Subject: Re: [AMRadio] High Voltage Power Supplies
> Eddy,
>
> It might be helpful if you describe that power
> supply topology. Is it full wave with transformer
> center tap, full wave bridge, an
Eddy,
It might be helpful if you describe that power
supply topology. Is it full wave with transformer
center tap, full wave bridge, and is the filter a pi
type, choke input filter, etc. If this is an option
for you, make a sketch, and scan it into a JPEG file,
and upload it to the net soemwhe
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 elimin
'Morning All,
I'm curious as to why I have to replace the silicon diode strings in my 2500
VDC power supply about every 8-10 years, or so...I just went through the
exercise again early this morning --- turned on the B+ to my 2 x 813 linear, &
got nothing back for my trouble but smoke from insid
12 matches
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