I was about to make a similar suggestion. But if the transformer has a 24V secondary jut use a FW diode bridge.
Bob Macklin K5MYJ Seattle, Wa, "Real Radios Glow in the Dark" ----- Original Message ----- From: "jeremy-ca" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" <[email protected]> Sent: Friday, February 15, 2008 7:03 AM Subject: Re: [AMRadio] Cap Substitution > Start from scratch and build a tripler using the 1N4007's you mentioned and > 150-220MF caps. Put a diode across the coil after its finished. Also use a > 10-20K bleeder on the PS output, 2-3W is sufficient. > > Carl > KM1H > > ----- Original Message ----- > From: "JT Croteau" <[EMAIL PROTECTED]> > To: "Discussion of AM Radio in the Amateur Service" > <[email protected]> > Sent: Friday, February 15, 2008 9:51 AM > Subject: Re: [AMRadio] Cap Substitution > > > > Carl: 6.3VAC with three 1N2069's across the relay, 2 facing the > > opposite direction from the other with 150 uF of capacitance. > > > > - JT > > > > On Fri, Feb 15, 2008 at 9:14 AM, jeremy-ca <[EMAIL PROTECTED]> wrote: > >> What is the full AC secondary voltage of the tranny, 6 or 12V? He may > >> have > >> been attempting a doubler or tripler circuit and you got it with parts > >> missing or miswired. If one diode was across the relay coil it is to > >> prevent > >> back EMF. A 24V relay will usually pull in around 16-18V. > >> > >> Carl > >> KM1H > >> > >> > >> > >> ----- Original Message ----- > >> From: "Bob Macklin" <[EMAIL PROTECTED]> > >> To: "Discussion of AM Radio in the Amateur Service" > >> <[email protected]> > >> > >> > >> Sent: Thursday, February 14, 2008 11:05 PM > >> Subject: Re: [AMRadio] Cap Substitution > >> > >> > >> > With a single 1N4007 and a capacitor you will have a filtered 1/2wave > >> > rectifier. It should charge to .9 time the 24V. That should be OK. > >> > > >> > You could use 4 1N4007s in a bridge and not use the capacitor. > >> > > >> > Bob Macklin > >> > K5MYJ > >> > Seattle, Wa, > >> > "Real Radios Glow in the Dark" > >> > ----- Original Message ----- > >> > From: "JT Croteau" <[EMAIL PROTECTED]> > >> > To: "Discussion of AM Radio in the Amateur Service" > >> > <[email protected]> > >> > Sent: Thursday, February 14, 2008 7:55 PM > >> > Subject: Re: [AMRadio] Cap Substitution > >> > > >> > > >> >> 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. > >> >> > >> >> - JT > >> >> > >> >> On Thu, Feb 14, 2008 at 10:49 PM, Bob Macklin <[EMAIL PROTECTED]> > >> 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 > >> >> > K5MYJ > >> >> > Seattle, Wa, > >> >> > "Real Radios Glow in the Dark" > >> >> > > >> >> > ----- Original Message ----- > >> >> > From: "JT Croteau" <[EMAIL PROTECTED]> > >> >> > To: "Discussion of AM Radio in the Amateur Service" > >> >> > <[email protected]> > >> >> > > >> >> > 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 > >> >> > > >> >> > > >> >> > > ______________________________________________________________ > >> >> > > Our Main Website: http://www.amfone.net > >> >> > > AMRadio mailing list > >> >> > > Searchable Archives: > >> > http://www.mail-archive.com/[email protected]/ > >> >> > > List Rules (must read!): http://w5ami.net/amradiofaq.html > >> >> > > List Home: http://mailman.qth.net/mailman/listinfo/amradio > >> >> > > Help: http://mailman.qth.net/mmfaq.html > >> >> > > Post: mailto:[email protected] > >> >> > > To unsubscribe, send an email to [EMAIL PROTECTED] > >> >> > with > >> >> > > the word unsubscribe in the message body. > >> >> > > > >> >> > > >> >> > ______________________________________________________________ > >> >> > Our Main Website: http://www.amfone.net > >> >> > AMRadio mailing list > >> >> > Searchable Archives: > >> > http://www.mail-archive.com/[email protected]/ > >> >> > List Rules (must read!): http://w5ami.net/amradiofaq.html > >> >> > List Home: http://mailman.qth.net/mailman/listinfo/amradio > >> >> > Help: http://mailman.qth.net/mmfaq.html > >> >> > Post: mailto:[email protected] > >> >> > To unsubscribe, send an email to [EMAIL PROTECTED] > >> with > >> >> > the word unsubscribe in the message body. > >> >> > > >> >> > >> >> > >> >> > >> >> -- > >> >> JT Croteau, N1ESE - Manchester, NH (FN42gx) > >> >> Contest Manager, TARA Skirmish > >> >> ______________________________________________________________ > >> >> Our Main Website: http://www.amfone.net > >> >> AMRadio mailing list > >> >> Searchable Archives: > >> http://www.mail-archive.com/[email protected]/ > >> >> List Rules (must read!): http://w5ami.net/amradiofaq.html > >> >> List Home: http://mailman.qth.net/mailman/listinfo/amradio > >> >> Help: http://mailman.qth.net/mmfaq.html > >> >> Post: mailto:[email protected] > >> >> To unsubscribe, send an email to [EMAIL PROTECTED] with > >> >> the word unsubscribe in the message body. > >> >> > >> > > >> > ______________________________________________________________ > >> > Our Main Website: http://www.amfone.net > >> > AMRadio mailing list > >> > Searchable Archives: > >> http://www.mail-archive.com/[email protected]/ > >> > List Rules (must read!): http://w5ami.net/amradiofaq.html > >> > List Home: http://mailman.qth.net/mailman/listinfo/amradio > >> > Help: http://mailman.qth.net/mmfaq.html > >> > Post: mailto:[email protected] > >> > To unsubscribe, send an email to [EMAIL PROTECTED] with > >> > the word unsubscribe in the message body. > >> > > >> > >> ______________________________________________________________ > >> Our Main Website: http://www.amfone.net > >> AMRadio mailing list > >> Searchable Archives: > >> http://www.mail-archive.com/[email protected]/ > >> List Rules (must read!): http://w5ami.net/amradiofaq.html > >> List Home: http://mailman.qth.net/mailman/listinfo/amradio > >> Help: http://mailman.qth.net/mmfaq.html > >> Post: mailto:[email protected] > >> To unsubscribe, send an email to [EMAIL PROTECTED] with > >> the word unsubscribe in the message body. > >> > > > > > > > > -- > > JT Croteau, N1ESE - Manchester, NH (FN42gx) > > Contest Manager, TARA Skirmish > > ______________________________________________________________ > > Our Main Website: http://www.amfone.net > > AMRadio mailing list > > Searchable Archives: http://www.mail-archive.com/[email protected]/ > > List Rules (must read!): http://w5ami.net/amradiofaq.html > > List Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > To unsubscribe, send an email to [EMAIL PROTECTED] with > > the word unsubscribe in the message body. > > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
