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Post by Deleted on Aug 27, 2010 8:10:53 GMT
Looks good to me Mike, just ordered mine to, there is one left now, might seem quiet expensive, but even combining the unit+postage, it would cost a lot more to make in small quantities here.
Mike,will you be able to get some 160VA toroidal power supplies made for those that want them, if so put me down for one please.
Mick.
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Post by clausdk on Aug 27, 2010 8:22:13 GMT
Mike,will you be able to get some 160VA toroidal power supplies made for those that want them, if so put me down for one please. Mick. Make that two  With a new job and all, I won't be finished with a wodden box before 2012, so I should maybe gat a box also  |
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Post by PinkFloyd on Aug 27, 2010 12:00:54 GMT
I will have Zero problems getting you guys the toroidals, I am just wondering whether 160VA is a bit too much.... 50VA may be a better bet.... I'll get a sample of each.
Mike.
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Post by PinkFloyd on Aug 27, 2010 12:09:23 GMT
He's going to send me a 50VA / 80VA and 100VA so I'll see which one suits the amp best  |
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Post by clausdk on Aug 27, 2010 22:19:52 GMT
This is starting to pish me off.. first a 100 uf cap was missing, which Mike has been so kind to send me.. So tonight I started putting the transistors and diodes on the board and what do you know I found out that I was missing one diode also  really annoying it is one of those that sits in the IN4001 holes and the component read IN4007.. Now I need to get one of those too.. Can they be bought as single pieces and where ?? It is really a dealbreaker to me when I buy something and parts of it is missing, the seller will not be getting a positive feedback from me, I know he would probably send me the missing parts if I write him, but it will take a looong time to get here... 4 solderings from being complete and I can not get anywhere because he could not be bothered by puttng the right things in the bag That is just so frustrating.. What are the red things on top of the diodes ? do I need some of them too ?? It would not surprice me if they should have been in the bag also |
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Post by Deleted on Aug 27, 2010 22:33:17 GMT
Claus, those are "snubber caps", which Mike has added (ie not in the kit). I think they come under Mikes "belt and braces" approach, I followed Mikes lead and put them on my Xcanv2, though I have to admit I have no idea of their effect  You can buy those diodes very easily, and as you need to, you way wish to get the UF4001 which are faster and offer a slight upgrade, again easily obtainable, from either your local outlet or via any online store or even Mike for that matter! Also, a lesson learned:- Check the contents of your kit before commencing work. Another lesson I learned the hard way was to measure as meany of the components as your DMM & ability allows, to avoid other disappointsments. Chris |
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Post by clausdk on Aug 27, 2010 22:39:36 GMT
I got some transistors called "something 246" that very in abundance, anybody up for a trade ;D ;D ;D I can also put a cap of 10uf in the pot ;D I am not the kind of guy who reads a partslist, I just plunge in But they would still not be there, I would just have been aware of it earlier.. |
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Post by clausdk on Aug 27, 2010 22:50:13 GMT
Would this do the trick docs-europe.origin.electrocomponents.com/webdocs/0928/0900766b809284f0.pdfI have to buy ten anyway so I might as well upgrade , as the difference in price is not that big, they are 4 times more expensive, but still quite cheap.. Should I get the snubber things also and what are their name ?? the shippng will be the same, so I might as well buy a little extra |
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Post by PinkFloyd on Aug 27, 2010 22:52:29 GMT
This is starting to pish me off.. Calm down dear, it's only a headphone amp  Shipped today. Not the end of the world Claus I've got PLENTY of these.... will send you a few Welcome to the world of "DIY"..... you are missing "one" capacitor and "one diode"? hehe...... don't fret mate....... there are always shortages or excesses in kits. Put yourself in the position of of "picker and packer".... have a look at all the bits and ask yourself if YOU could pack 100% of the items 100% of the time? think about it One capacitor and one diode missing does NOT warrant negative feedback.... chill out man..... mistakes happen (we are all human) . You are "missing" two components... contact the seller and make him aware of this, I'm sure he will send them over ASAP to you. In the meantime, I have sent you a 100uF cap today and will send you some UF4007 tomorrow. Contact David (Panda amp man) and tell him you have damaged one of the 1K5 Dale resistors.... I am CONFIDENT he will send you a few of them FOC. Just wait till you fire the amp up and, let's say, it doesn't work? You should NOT be frustrated during the build phase... if you are it means you are rushing the job....... take your time, enjoy building it... it's not a race Those are 47nF shunt caps and are NOT part of the kit.... if you read my previous posts you will have understood this Claus..... these are "add ons" I have fitted myself. Seriously man, don't rush the brush... take your time, sniff the roses... all is good and all will become clear Don't go in like a headless chicken.... you'll get nowhere fast that way Mike. |
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Post by clausdk on Aug 27, 2010 23:03:58 GMT
I am not really that angry, I just needed to get it off my chest.. Also the parts are cheap and apparantly easy avaible.. And at the price we are paying for this, I really can not complain about anything.. I have already given the seller positive feedback  I would like to say thanks for the diodes also in advance.. You are also right that I need to save my ranting to when it blows up and burns the house down when I at some point get it connected to a PSU  But it was still frustrating  |
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Post by PinkFloyd on Aug 27, 2010 23:13:09 GMT
As long as it doesn't turn up on my doorstep needing first aid |
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Post by clausdk on Aug 27, 2010 23:33:11 GMT
As long as it doesn't turn up on my doorstep needing first aid Only a matter of time my friend |
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Post by Deleted on Aug 28, 2010 7:12:30 GMT
In view of what i am reading from claus Mike, better get ready for my replacement parts list then!! ;D. I certainly wont be rushing, its just taken me about 6hrs to fit frans upgrade parts to my G2,(mind you, soldering those little tiny parts round the power supply with as shorter connections as possible, and making it look professional is no mean feat, even i suspect, to a competent electrician. Just hope it works when i fire it up to day . Mick. |
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Post by Deleted on Aug 28, 2010 7:45:13 GMT
1N4001 and 1N4007 have in fact similar properties when in 'conductive' forward mode, when they are conducting and doing their rectifying job. The only difference between them is the reverse voltage they can handle and their capacitance which is of no concern, certainly not when you are going to put snubber caps across them. 1N4001 = 50V (MORE then enough for this amp there is less then 35V AC) and 1N007 = 1000V. 1N4007 being the most universal as you can use them in a 230V AC rectifier where you can't use 1N4001. UF400x have different forward voltages (lower then 1N400x) and capacitances and are intended for rectifying the output voltages of switch mode power supplies (these work between 50kHz to 200kHz in general as opposed to 50/60Hz of the mains) Putting caps over them makes them MUCH slower as 1N400x without caps. UF400x rectified DC voltages will be aproxiamtely 0.2V higher then if rectified with 1N400x diodes. The caps do have one advantage and that is the rectifier becomes almost zero Ohms for RF signals (talking above 1MHz here) This has the advantage of noises on the mains above 1MHz (introduced by badly filtered switching devices/refridgerators and other things with motors that switch on an off) that are present are NOT 'rectified' (they are effectively shorted) and are no longer able to cause, so called differential mode, noises on the amps powerrail. Nasties between 50Hz and 20kHz will still be rectified and these are the audible ones. BUT... have no fear because.. The 2.2 Ohms resistors together with the big reservoir caps in the powerline part of the amp completely 'eliminate' these rectified peaks anyway. These nasties are dissipated in the 2.2 Ohms resistor. Any warmth in these resistors b.t.w. is caused by drawn current of the amp and are NO indication there are nasties on the powerline. common mode signals still can find it's way into the amp more easily but these can be filtered out with a good mains filter. The 2.2 Ohms resistors and caps pose no 'barrier' for this kind of signals. That's about the technical. You may judge the audible consequences. I do agree with Claus that they should be more carefull assembling the kits and would like all 4 diodes and the caps to be the same. The price of the kit, however, is so rediculously low that you can't blame them for some 'sloppyness' Mike received 'extra' parts and you a shortage. Were the extra parts meant so you could match some of those ? |
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Post by clausdk on Aug 28, 2010 8:40:51 GMT
Frans: You are a treasurechest of information  It even sounds simple this time What is strange to me, is that first we put in a component that makes sure that the current only flows one way, which is probably because the caps and other parts will be harmed by current in the wrong diretion ?? But putting the snuffercaps on top, gives the current a loophole, so if current is running the wrong way, would it not take the "capway" and make havoc ?? It seems like a oneway street, where convertibles are allowed to go in the wrong way |
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Post by clausdk on Aug 28, 2010 8:45:14 GMT
Mick:
I can post pictures of MY soldering, that would relieve the pressure, as Mike does a very proffesional job and would be hard to follow for guys like us . . . . .
Then you can say to yourself "it is not as pretty as it could be, but prettier than claus' work" LOL
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Post by clausdk on Aug 28, 2010 8:51:15 GMT
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Post by PinkFloyd on Aug 28, 2010 8:55:11 GMT
Claus,
I didn't use any of my 1N4001 so will send you all four of them.... anything else you need whilst I'm at it?
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Post by clausdk on Aug 28, 2010 8:57:53 GMT
In view of what i am reading from claus Mike, better get ready for my replacement parts list then!! ;D. I certainly wont be rushing, its just taken me about 6hrs to fit frans upgrade parts to my G2,(mind you, soldering those little tiny parts round the power supply with as shorter connections as possible, and making it look professional is no mean feat, even i suspect, to a competent electrician. Just hope it works when i fire it up to day . Mick. I have spent about 8 hours to populate and solder the thing, but I also messured all the resistors to check what their values were. Another thing that came in handy was a maginifying glass, as the letters on the parts are very small and can be hard to read, maybe I need glasses |
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Post by clausdk on Aug 28, 2010 9:04:32 GMT
Claus, I didn't use any of my 1N4001 so will send you all four of them.... anything else you need whilst I'm at it? Thanks Mike, I really appreciate it. Everything else is soldered in to place, now I just hope it is in the right places ;D ;D I will send you a small present, as soon as I figure out what to send, as a small token to show how gratefull I am for your help.. |
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Post by PinkFloyd on Aug 28, 2010 9:06:05 GMT
These ones Claus?  If so, they are meant to be kissing each other |
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Post by PinkFloyd on Aug 28, 2010 9:08:38 GMT
Frans..... Output resistors..... I'm thinking starting with 75R and will mount them on the head socket so they will be easy to remove.....
120R would be my preferred impedance but let's try a few.
Claus, before you ask, I will send an assortment of resistors to you so you can try a few different values.
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Post by clausdk on Aug 28, 2010 9:09:05 GMT
Exately, good to hear as I am not sure they do not kiss..
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Post by clausdk on Aug 28, 2010 9:16:17 GMT
Claus, before you ask, I will send an assortment of resistors to you so you can try a few different values. ;D ;D ;D ;D ;D ;D You are my hero |
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Post by clausdk on Aug 28, 2010 9:21:22 GMT
Claus, I didn't use any of my 1N4001 so will send you all four of them.... anything else you need whilst I'm at it? Well come to think about it I will be needing a HPsocket and RCAsockets.. |
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