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.
