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Post by PinkFloyd on Jun 26, 2006 22:50:43 GMT
Just spent a few minutes drawing this "point to point" diagram hope it helps. As long as you connect the parts as shown you'll have a fully operational crossfeed. Parts standard: 2k2 metal film resistor 2K metal film resistor 330R metal film resistor 47nf Metalised polyester film capacitor 200nF Metalised polyester film capacitor (220nF will be fine also) 4 x Nickle plated phono sockets Parts Audiophile: 2k2 0.1% metal film resistor 2K 0.1% metal film resistor 330R 0.1% metal film resistor 47nF Polypropylene film capacitor 200nF Polypropylene film capacitor (220nF will be fine also) 4 x Gold plated phono sockets Have fun! Cheap crossfeed in a mint tin: A bit more costly but nicer looking in the mini Hammond enclosure:
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rickcr42
Fully Modded
Rest in peace my good friend.
Posts: 4,514
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Post by rickcr42 on Jun 26, 2006 23:32:46 GMT
needed to be here mike even though I realise you personally have no use for the accessory
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Post by jonnywolfet on Jun 28, 2006 19:00:15 GMT
awesome pinkfloyd, ill build one as soon as i get the parts. thanks for upping the info!!!
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Post by PinkFloyd on Jun 28, 2006 19:03:49 GMT
awesome pinkfloyd, ill build one as soon as i get the parts. thanks for upping the info!!! No probs Mr. Wolfet, any questions just ask!
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Post by PinkFloyd on Jul 1, 2006 21:14:05 GMT
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rickcr42
Fully Modded
Rest in peace my good friend.
Posts: 4,514
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Post by rickcr42 on Jul 2, 2006 1:59:45 GMT
Tasty.The cosmetics suck but still tasty. Kinda like when you drop a nice piece of meat on the deck while transferring it from the grille to the serving plate.Yeah it hit the ground and yeah it will not be palatable for some but hell boy ! You don't waste a piece of meat like that so no matter how ugly it looks you slap it around to get the road dust off,toss it down your neck anyway,enjoying every damn bite as you look at everyone at the same table who have been watching YOU for the last ten minutes and say........................... "what ?" .
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Post by PinkFloyd on Jul 2, 2006 9:11:09 GMT
There's a limit to what you can do with a Hammond enclosure but, to be honest, the mini Hammond actually does look tasty in real life. It's solid, it's smaller than a packet of cigarettes and it sits very well on the deck thanks to the 3m "bump on" feet. How dare you compare my work to a piece of meat that has fallen onto the floor! Cosmetics are faultless with even the screws and phono sockets tightened up so they are symetrical...... this is state of the art construction Rick and not akin to one of your raw meat and bone dinners you've dropped on the floor Edit: On the "dinner" subject you mean to tell me you actually use a "plate" I was always under the impression that the Rickmonster ate direct from the live beast
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Post by jonnywolfet on Jul 2, 2006 11:06:50 GMT
pinkie, where do you source your parts? im a bit of a novice, and dont really know what resitor types to choose or polywhatsamisit capacitor values. the maplin website confuses me!!! www.maplin.co.uk/Search.aspx?criteria=metal%20film%20resistor&doy=2m7&source=15aaargh! so many different types!! what are the high spec ones? would they be better for audio? should i get the resistor starterpack? would that be a good idea for future projects? www.maplin.co.uk/search.aspx?MenuNo=1578&FromMenu=y&doy=#DayOfYearagain, aaaargh!!! what do i choose? is there a better site i can order from? i have ordered a book on basic electronics i really want to learn about amp diy, and will probably bug you quite a bit untill i get a handle on this! thanks in advance jon.
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xerxes
Been here a while!
Posts: 1,115
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Post by xerxes on Jul 2, 2006 12:24:10 GMT
In the crossfeed I built I used Evox Rifa capacitors, which is what Mike has used in his crossfeed and Welwyn RC55Y precision resistors; not the same as the ones Mike has used, but good quality and well up to the job. You can get these resistors and capacitors at RS Components, you'll find them in the Electronic Components section under Passives, I would have linked to them, but for some reason links to specific pages on RS' web site don't work. I also built a switching version which allowed you to bypass the crossfeed completely or select 3 different levels of crossfeed. You can see that in this thread: rockgrotto.proboards39.com/index.cgi?board=b&action=display&thread=1103403789&page=1 and there are some pictures here: www.tdsf.co.uk/Xfeed/Xfeed.htmlIncidentally, I don't actually use the crossfeeds, I discovered I prefer the sound without them, but I did enjoy building them and they were a good first projects, with no nasty power to worry about.
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Post by PinkFloyd on Jul 2, 2006 14:16:05 GMT
Just to totally gross you out Rick: Got totally carried away on the stripboard with the words "bullet proof" at the forefront of my mind ;D My own personal crossfeed has got to be able to withstand nuclear attack so not only are the components connected by the copper traces they are also P2P under the board. Will slot this engine into a Hammond later.... whoah!
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Post by PinkFloyd on Jul 2, 2006 15:27:35 GMT
Most of the parts (well, all of them) can be got from www.rapidonline.com1 x 30-1558 Hammond aluminium enclosure £4.95 1 x 10-4166 47nF Metallised polyester capacitor £0.11 2 x 10-4151 220nF Metallised polyester capacitor £0.18 1 x 62-0792 packet of 100 x 330R resistors £0.95 1 x 62-0844 packet of 100 x 2K resistors £0.95 1 x 62-0847 Packet of 100 x 2K2 resistors £0.95 1 x 34-0505 stripboard £0.57 2 x 20-1240 Red gold plated phono socket £2.20 2 x 20-1245 Black gold plated phono socket £2.20 Total: £13.06 Those capacitors are metallised polyester types if you want to use the polypropylene types then you'll get them from rswww.com
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xerxes
Been here a while!
Posts: 1,115
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Post by xerxes on Jul 2, 2006 17:15:42 GMT
.......and if you do it like this: You'll need about £5.00 worth of solder as well. I seem to remember reading somewhere that polypropelene caps sound better than polystyrene. Has anyone done a direct comparison?
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Post by jonnywolfet on Jul 2, 2006 17:37:48 GMT
awesome, just spent some cash. ill post my experiences. thanks!
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Post by PinkFloyd on Jul 2, 2006 19:03:25 GMT
.......and if you do it like this: You'll need about £5.00 worth of solder as well. It's a Euro thing xerxes, I'm laying down as much lead as I can doing my bit for greenhouse gases... future generations will thank me for the beautiful warm, sunny weather they are experiencing. No, seriously, I had a certain length of solder hanging loose on the bench and decided to use it all up as I'm moving house soon.... it also adds "weight" to the unit and, as we all know, "weight" equates to "quality". This isn't one of your cheapskate,light, Euro friendly efforts...... on no..... this is full on, in yer face, jam packed with lead, designed to last, capable of withstanding a nuclear attack, for use in all weathers, space compatible, ozone blasting, sea level rising, earthquake compatible built like a brick shithouse quality. Gonna use some MILITARY grade hookup wire and encase the entire shebang in globs of epoxy resin.. this puppy will LAST!
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Post by PinkFloyd on Jul 2, 2006 19:08:06 GMT
awesome, just spent some cash. ill post my experiences. thanks! Nice one Mr. Wolfet! Remember to cut a section of copper off the stripboard (as shown by the red line) for the resistors to go across. Easy way to do this is to get a craft knife, score down a couple of lines on the stripboard then lay a hot iron between the two lines you've scored.... this will lift the copper trace and leave a nice non conductive channel for you. Look at the pictures it will explain itself. Note: you don't have to solder all the tracks as shown in that picture, I was just being silly. Mike.
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Post by PinkFloyd on Jul 2, 2006 19:19:53 GMT
Oh yes. I can't hear that much of a difference between the two but most people claim polypropylene sounds better. Polyester (IMO) sounds organic and grainy whereas polypropylene sounds decidely rubbery, boingy and quacky.. some people prefer the polyprop signature but I prefer polyester or a combo of the two. You mentioned polystyrene...... yes, they are nice sounding but only available in relatively small values, sound very nice paralleled with polyesters.
My particular favourite is a combo of polyester, polyprop and silvered mica... nice smooth organic sound when paralleled.
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rickcr42
Fully Modded
Rest in peace my good friend.
Posts: 4,514
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Post by rickcr42 on Jul 2, 2006 19:53:19 GMT
Was working security for a biker party/pig roast a few years back (knucklhead patrol though mostly "park over there " ) and could not wait for the "beast" to be totally done so I took out my trusty buck knife and commenced to carving out hunks for my own private snacky time which pissed off not a few party goers when they seen the carnage I perpetrated on the carcass ! Good thing the Rickmonster is well loved or I think maybe it would have been my ass in the pig cage spinning slowly over the open fire.especially when it was discovered I had tapped my own private keg right next to the pig which was also where I had parked my jeep.Someone say "private party ?" the plus side is the easy to use/easy to find damn near anywhere part combined with it is massive enough with all but the most overkill interconnects (heavy cables "tip" lightweight audio gear).the minus side is they are so widely in use for everything small project DIY audio it is to the extreme BORING point for me so is the last refuge-only if I must-or custom front panel.Only so much you can do with paint dude and the cost of powder coating not very cost effective unless you do a large run. soooo there Adds character to the meat dude ! Secret recipe OK.You win pink dude.I must have been delusional when I posted..........or drunk as fk (pick B,pick B)
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rickcr42
Fully Modded
Rest in peace my good friend.
Posts: 4,514
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Post by rickcr42 on Jul 2, 2006 20:14:17 GMT
looks like something you would find under the hood of a 50's era hot rod ;D all about adding MASS to such a lightweight assembly.we like our audio to not just have weight in the bass but weight in the pocket too so if we drop it we know it is gone when our bodies stop listing to the right I don't see no Kevlar or plate steel Mike ? Bullet proof ? pffft,in your dreams bud...... Polyester is usually soft around the edges.nice enough but you do lose a bit of the micro detailing.Polypropylene can have a "plastic" sound that once you know it is readily identified but this is less so if you go past Polypropylene and Metalised Polypropylene and stright to Film and Foil Polypropylene. all about the construction method with the metalised being metal depositied on the dielectric sheet,bonded to the plastic,while the film and foil is an actual foil sheet then a plastic sheet rolled together (and why they are so damn heavy for the size in direct comparison to other caps ). MKP is metalised,FKP is foil ALL passive devices are Nuke Proof being totally uneffected by an EMP Damn mike ! Are you totally out of your mind dude ? Expect of visit from the "PC Police" sometime in the night where they will do their best to make you conform.Can't have such talk in a public forum,others may get ideas and then where will we be ? ANARCHY !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! also a good idea to stagger the materials if you want to avoid a "signature" sonic profile.that means if you have something with an input coupling cap and an output coupling cap it is usually best to use two entirely different caps rather than two diferent values of the same-at least that is my experience/opinion such as it is. Where you MUST use identical caps is any network that is switched such as a multi-position crossfeed network or switched filters ot you will get screwy sonics when you switch from one setting to another by changing the entire "sound" at the postion my fav is finding the best single cap/type for each positional duty using bypasses only when it is to shunt something to ground such as RFI different strokes man .
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Post by PinkFloyd on Jul 2, 2006 20:57:31 GMT
You got it
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Post by PinkFloyd on Jul 3, 2006 22:10:57 GMT
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rickcr42
Fully Modded
Rest in peace my good friend.
Posts: 4,514
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Post by rickcr42 on Jul 3, 2006 23:25:40 GMT
PULL ! BLAMMO !!!!!PULL ! BLAMMO !!!!!Next !
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