FS: (UK) Heatsinks (0.04 C/W) 300mm x 32mm x 100mm 1.5Kg - Page 1
Forum section: electronics / general

author: TopLoser
author_rank: Unknown
timestamp: July 26, 2013, 08:40:22 pm
content: I've just been coerced into buying a large quantity of high quality heastsinks. They were an unwanted order and are all new and unused, just taken out of the shipping crate.http://uk.farnell.com/h-s-marston/890sp-03000-a-100/heat-sink-300mm/dp/4106015?Ntt=4106015http://www.farnell.com/datasheets/1692180.pdfBig heavy (300mm x 32mm x 100mm extruded aluminium, fins are perfect for accepting self tapping screws to attach fans to for ultimate performance (0.04 C/W). 1.5Kg in weight.List price is £65+VAT anybody want any for £10 each? Shipping is extra of course, but I will ship them anywhere (I'm in the UK).

author: PedroDaGr8
author_rank: Super Contributor
timestamp: July 26, 2013, 11:35:34 pm
content: You should try listing these on any audio sites you may be on (ie DIYAudio). Audio guys would love these things, especially at this price. If you were in the states i'd likely be down for one, alas shipping will likely kill it otherwise.

author: TopLoser
author_rank: Unknown
timestamp: July 26, 2013, 11:49:09 pm
content: oooh that's a great idea. Already had a number of people wanting them and I do agree shipping is the biggest cost when they are this cheap.Shipping to the US would be about £8 each if you buy 5... the more you buy the cheaper shipping becomes. Why not buy 10 or 20 and become my US distributor!!

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2013, 09:26:31 am
content: hmm, whats the shipping to hungary?

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 10:05:34 am
content: £20 for up to 10 of them, very reasonable really

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: July 27, 2013, 12:32:32 pm
content: Unfortunately I doubt most audio enthusiasts would be interested in these. They are clearly manufactured to be used exclusively with a serious amount of forced air cooling, which the audio enthusiasts shuns for obvious reasons.Fin spacing and the overall physical dimensions makes them perfectly useless for natural convection cooling (fanless, IE. still air).

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2013, 01:08:11 pm
content: i dont know how much did you buy and still able to sell it under their 100of price

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: July 27, 2013, 01:35:40 pm
content: Quote from: AcHmed99 on July 27, 2013, 01:16:29 pmAbsolutely. A small fan would make a world of difference.I just tend to mention the potential problem, when this subject raises its head. Many beginners seem unaware of the different types of heat sinks, and how to properly put to use - in particular - the convection cooled type.It can feel rather frustrating, when you see a well built audio power amp, where the builder has put significant time, money and effort into the project. Yet despite this, then the fine machine ends up burning its way through the floorboards, whenever it has been switched on for a few moments.

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 05:40:00 pm
content: M. Andras... how can I sell at below the 100 off price? Well... I bought 120 of them for about 1.5 times the scrap aluminium value. They were in a large shipping crate that had been badly handled, about 20 of them had slightly bent fins as a result. The intended customer returned them and I bought them for a very fair priceI buy many, many items like this. At the same time as the heatsinks I bought:840 off MICROCHIP - PIC18F2520-I/SP (Sealed box of unopened tubes of 15, £50 the lot)http://uk.farnell.com/microchip/pic18f2520-i-sp/ic-8bit-flash-mcu-18f2520-sdil28/dp/9321233100 off NICHICON - LLS1H472MELB - CAPACITOR, 4700UF, 50V (£5 the lot)http://uk.farnell.com/nichicon/lls1h472melb/capacitor-4700uf-50v/dp/881322120 off PANASONIC - EETED2D102CA - CAPACITOR, 1000UF, 200V (£2 the lot)http://uk.farnell.com/panasonic/eeted2d102ca/capacitor-1000uf-200v/dp/1198614100 off ROTH ELEKTRONIK - RE200-LFDS - PCB, EUROCARD, FR4, DBL-SIDED, 2.54 (£50 the lot)http://uk.farnell.com/roth-elektronik/re200-lfds/pcb-eurocard-fr4-dbl-sided-2-54/dp/1172149?Ntt=1172149100m roll of Nexans RG316 coax (£10)http://uk.farnell.com/nexans/rg316u-100m/cable-coax-rg316u-100m/dp/1217852Those were the prices I paid. Obviously they won't be for sale at those pricesI have huge amounts of reels of SMT caps, waffle trays of PICs and memory devices, unopened tubes of all sorts of semiconductors, heavy boxes of capacitors, all sorts of cable, so much stuff I haven't started to look through most of it...

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2013, 05:46:39 pm
content: hmm, where can you get such a good dealbtw that 20 pounds would be per heatsink or total price of shipping for 10 of them?

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2013, 05:52:34 pm
content: even at 2heatsinks would be 20?

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 05:57:55 pm
content: Yes, that's the UPS fixed shipping rate for packages up to 20Kg.

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2013, 06:16:35 pm
content: and what sort of payment you prefer?btw is that nexans coax cable any good for general purpose use or its specially for some application?

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 06:20:12 pm
content: It's specialised cable, meant for high temperature (up to 200C) and high frequency (3GHz).PayPal is fine, but bank transfer preferred for larger value payments.

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2013, 06:47:31 pm
content: looked up some connectors of that cable it would be good for scope interconnectscan you put aside for me that 2 lot of caps the nexan coax and 2 of the heatsink? next week is payweek for me so i cant pay sooner

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 06:53:22 pm
content: Careful with the caps and the cable...QuotePM me when you want the heatsinks, I'm not going to sell them all in a hurry!

author: Monkeh
author_rank: Super Contributor
timestamp: July 27, 2013, 07:37:04 pm
content: So how much for those 4m7 caps?

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 07:48:07 pm
content: 1 off £0.50 each10 off £0.45 each50 off £0.40 eachThink I've got about 80 left as of a few minutes ago.

author: Monkeh
author_rank: Super Contributor
timestamp: July 27, 2013, 07:52:43 pm
content: And delivery within our glorious empire?

author: TopLoser
author_rank: Unknown
timestamp: July 27, 2013, 07:59:14 pm
content: Shrugs shoulders, lets guess at £1.50 regardless of quantity? Or I can charge you exactly what the nice lady at the Post Offices extorts out of my wallet on the day. Your choice.

author: nctnico
author_rank: Super Contributor
timestamp: July 28, 2013, 04:48:21 pm
content: Quote from: ElectroIrradiator on July 27, 2013, 12:32:32 pmOTOH only a little bit of airflow is required to get a decent level of cooling. So a low noise fan at low rpm together with these heatsinks can provide quite some cooling capacity. A temperature controlled fan is also an option. If an amplifier is pushed to the limits the music is probably much louder than most fans.

author: M. András
author_rank: Super Contributor
timestamp: July 28, 2013, 05:06:57 pm
content: but it injects noise into the music!!!!!!!! as the blades moves they create unbalanced soundwaves

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: July 28, 2013, 05:27:54 pm
content: Quote from: nctnico on July 28, 2013, 04:48:21 pmUnfortunately, when the good people over on DIYaudio need large heatsinks, then it is usually because they want the output stage(s) to run full on class A. So a temp controlled fan is rather pointless. You either need it, or you don't.For class AB cooling isn't too much of an issue. 100W rated output is still fairly reasonable. 25W output in class A frequently isn't...Personally I also prefer my audio gear to be fan less. Fortunately I prefer headphones to speakers, so I don't have much of a problem with cooling.

author: DaveW
author_rank: Frequent Contributor
timestamp: August 05, 2013, 01:35:39 pm
content: 6 heatsinks arrived today; very well packed! Thanks TopLoser, a pleasure buying from you

author: neslekkim
author_rank: Super Contributor
timestamp: August 05, 2013, 09:59:42 pm
content: Quote from: TopLoser on July 27, 2013, 05:40:00 pmso what are those PICs going for? (also looking for the smaller, 8pins pics etc)

author: TopLoser
author_rank: Unknown
timestamp: August 07, 2013, 08:01:34 pm
content: Quote from: neslekkim on August 05, 2013, 09:59:42 pm£1 each, £25 for 45, £40 for £100 ?

author: mikstick
author_rank: Newbie
timestamp: August 20, 2013, 11:29:46 pm
content: Was that £0.45 on the caps.............if so can I get 20?email me your paypal and details............. thanks

author: Monkeh
author_rank: Super Contributor
timestamp: August 20, 2013, 11:48:58 pm
content: D'oh, I forgot to say thanks for my caps.

author: nctnico
author_rank: Super Contributor
timestamp: August 23, 2013, 12:49:53 pm
content: I've received the heatsinks and they are better than expected. They even have a smooth machined surface. Its against my principles to buy things I don't need right away but I have a feeling I'm not going to regret this purchase

author: TopLoser
author_rank: Unknown
timestamp: August 23, 2013, 04:07:57 pm
content: Quote from: nctnico on August 23, 2013, 12:49:53 pmMany thanks for paying for the extra one I accidentally put in your parcel. And apologies to the guy who received 3 instead of 4...!! (sorted now).And yes they are very high quality machined surfaces. Plenty more left if anybody wants any.

author: M. András
author_rank: Super Contributor
timestamp: August 23, 2013, 07:32:42 pm
content: the 3 which i got are even mirror finish with a small wittness marks from the flycutter. but the sides dont seem to be machined but who mounts anything on the side anyways

author: mikstick
author_rank: Newbie
timestamp: August 26, 2013, 08:57:06 pm
content: thanks so much for a great deal on those caps, quality stuff! Arrived safe and quick. Take care

author: cavlovic
author_rank: Contributor
timestamp: October 02, 2013, 08:36:39 pm
content: Hey,can you tell me how much would 5 of your heatsinks cost shipped to Montenegro?Thank you.

author: DaveW
author_rank: Frequent Contributor
timestamp: October 03, 2013, 12:27:08 pm
content: Quote from: TopLoser on August 23, 2013, 04:07:57 pmNo problem and thanks for sorting it out so quickly! Two of them are now working in a 750W dummy load!

author: M. András
author_rank: Super Contributor
timestamp: October 03, 2013, 08:16:41 pm
content: Quote from: DaveW on October 03, 2013, 12:27:08 pmtemps pleasewith model number of the attached fans