|[AMRadio] Cap Substitution|
jt.n1ese at gmail.com
Thu Feb 14 22:55:24 EST 2008
Nope Bob, this guy definitely only had three 1N2069's in parallel -
two cathodes to one anode connected directly to a 6.3V tranny.
I'm not looking to put it back the way he had it, I'm putting it back
the way the schematic shows it with a 1N4007 instead of the 1N91 shown
(already have in my junk box) and a filter cap.
I'm just trying to understand how he was getting the 24V relay to work
with a 6.3V tranny.
On Thu, Feb 14, 2008 at 10:49 PM, Bob Macklin <macklinbob at msn.com> wrote:
> Connecting diodes in parallel does not really effect the current like
> connecting batteries in parallel. The diode with he lowest forward drop will
> handle most of the current.
> But if you really had diodes connected with anode to cathode you don't have
> a rectifier. That configuration is used in voltage limiter circuits.
> Got to Radio Shack and get some 1N4000 series diodes and use them for
> rectifiers. You only need one for a 1/2wave rectifier. Or 4 connected in a
> bridge for a full wave rectifier.
> Are you sure the ones you have are not connected in a bridge circuit. There
> would be 4 diodes. And 2 of them would have the cathodes connected together.
> The other 2 would have the anodes connected together.
> Bob Macklin
> Seattle, Wa,
> "Real Radios Glow in the Dark"
> ----- Original Message -----
> From: "JT Croteau" <jt.n1ese at gmail.com>
> To: "Discussion of AM Radio in the Amateur Service"
> <amradio at mailman.qth.net>
> Sent: Thursday, February 14, 2008 7:38 PM
> Subject: Re: [AMRadio] Cap Substitution
> > As a follow up to all this talk..
> > The person who did this mod, was rectifying the power to this 24V
> > relay with three 1N2069's in parallel with 2 cathodes facing one
> > direction and the other cathode facing the opposite direction. These
> > were wired to a dedicated 6.3V tranny he also added. Any idea why he
> > would have done this rather than using the 24V tap on the filament
> > transformer specially there for a 24V relay? I measure roughly 26V on
> > this tap so I would assume the tranny is fine.
> > --
> > JT Croteau, N1ESE - Manchester, NH (FN42gx)
> > Contest Manager, TARA Skirmish
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JT Croteau, N1ESE - Manchester, NH (FN42gx)
Contest Manager, TARA Skirmish
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