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DIY headphone amplifier
"Jem Raid" wrote in message ... "Arfa Daily" wrote in message ... "Jem Raid" wrote in message ... I'm thinking of making a headphone amp and have found various sites with circuits. I've also found the circuit diagram for the Grado RA1 amp, turns out to be a single chip of £0.50 value and a few resistors, it gets great reviews and costs anywhere between £350 and £400. It is in a mahogany case though. I intend to make mine in a roomy Scottish Shortbread biscuit tin we got for Christmas. I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? Jem Only if you build the Elektor Electronics valve headphone amplifier ... d;~} Arfa Hmmm Elektor ahh yes ............. would I get the component list on an A3 sheet .... double sided of course?-) Jem Oh you little sceptic !! It was a very simple and elegant little design ... Arfa |
DIY headphone amplifier
"Tony Gartshore" wrote in message ... In article , says... I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? I suspect the vintage tin may perform better on Ebay.. Depending on whether or not the degree of 'battering' can be described as 'patina' or not.. T. Jem ------------------------------------------------------ Birmingham Independent Photographers http://bip.wikispaces.com/ Dear Tony, What a wonderful reply I fell about laughin'. Thanks - Jem -------------------------------------------------------- Dramatised - Photography Granularised - Photographs Black and White - Prints Blue and White - Cyanotypes http://jemraid.wikispaces.com/ |
DIY headphone amplifier
In ,
Don Pearce typed: but if you can find it, the archetypal tin for these kinds of project was the metal OXO tin. Sweet memories ! All of my early valve projects were OXO based. Nowadays we are lucky to get OXO and biscuit tins that are not plastic. Grump, grump. Jo |
DIY headphone amplifier
"Arfa Daily" wrote in message ... "Jem Raid" wrote in message ... "Arfa Daily" wrote in message ... "Jem Raid" wrote in message ... I'm thinking of making a headphone amp and have found various sites with circuits. I've also found the circuit diagram for the Grado RA1 amp, turns out to be a single chip of £0.50 value and a few resistors, it gets great reviews and costs anywhere between £350 and £400. It is in a mahogany case though. I intend to make mine in a roomy Scottish Shortbread biscuit tin we got for Christmas. I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? Jem Only if you build the Elektor Electronics valve headphone amplifier ... d;~} Arfa Hmmm Elektor ahh yes ............. would I get the component list on an A3 sheet .... double sided of course?-) Jem Oh you little sceptic !! It was a very simple and elegant little design ... Arfa Picks himself up from the floor and runs round to the newsagent, "Is that politikal, Mate" Jem ---------------------------------------------------- Dramatised - Photography Granularised - Photographs Black and White - Prints Blue and White - Cyanotypes http://jemraid.wikispaces.com/ |
DIY headphone amplifier
Jem Raid wrote:
I'm thinking of making a headphone amp and have found various sites with circuits. I've also found the circuit diagram for the Grado RA1 amp, turns out to be a single chip of £0.50 value and a few resistors, it gets great reviews and costs anywhere between £350 and £400. It is in a mahogany case though. I intend to make mine in a roomy Scottish Shortbread biscuit tin we got for Christmas. I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? Jem Could you list the parts in a Grado RA ! amp and a link to the circuit diagram ta in advance -- Dave www.davewhitter.myby.co.uk Music is Art - Audio is Engineering Steam is Fun ------------------------------------------------------ Birmingham Independent Photographers http://bip.wikispaces.com/ |
DIY headphone amplifier
" Dave xxxx" wrote in message . uk... Jem Raid wrote: I'm thinking of making a headphone amp and have found various sites with circuits. I've also found the circuit diagram for the Grado RA1 amp, turns out to be a single chip of £0.50 value and a few resistors, it gets great reviews and costs anywhere between £350 and £400. It is in a mahogany case though. I intend to make mine in a roomy Scottish Shortbread biscuit tin we got for Christmas. I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? Jem Could you list the parts in a Grado RA ! amp and a link to the circuit diagram ta in advance -- Dave www.davewhitter.myby.co.uk Music is Art - Audio is Engineering Steam is Fun ------------------------------------------------------ Birmingham Independent Photographers http://bip.wikispaces.com/ earwigo Dave http://www.hydrogenaudio.org/forums/...hp/t29528.html The parts list is unnecessary as you will see :-) Jem -------------------------------------------------------- Dramatised - Photography Granularised - Photographs Black and White - Prints Blue and White - Cyanotypes http://jemraid.wikispaces.com/ |
DIY headphone amplifier
"Jem Raid" wrote in message
I'm thinking of making a headphone amp and have found various sites with circuits. I've also found the circuit diagram for the Grado RA1 amp, turns out to be a single chip of £0.50 value and a few resistors, it gets great reviews and costs anywhere between £350 and £400. It is in a mahogany case though. http://www.geocities.com/rubin_jpk/r...RADO_schem.gif I intend to make mine in a roomy Scottish Shortbread biscuit tin we got for Christmas. I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? This is pretty ironic, given all the angst about the sonics one reads about JR4556 chips. I must have read 1,000 articles suggesting that one audio component or another could be "mind-blowingly" enhanced by replacing 4556 chips with something more highly thought-of by the author. Of course, its just fine, but people like to bad-mouth parts that are readily-available and cheap, even if they perform just fine. If you've misplaced your soldering iron, just try one of Behringer's offerings with a headphone jack. They are very fond of 4556 chips and chips like them... ;-) http://www.behringer.com/HA4700/index.cfm?lang=ENG |
DIY headphone amplifier
"Arny Krueger" wrote in message ... "Jem Raid" wrote in message I'm thinking of making a headphone amp and have found various sites with circuits. I've also found the circuit diagram for the Grado RA1 amp, turns out to be a single chip of £0.50 value and a few resistors, it gets great reviews and costs anywhere between £350 and £400. It is in a mahogany case though. http://www.geocities.com/rubin_jpk/r...RADO_schem.gif I intend to make mine in a roomy Scottish Shortbread biscuit tin we got for Christmas. I do also have an old, smaller and thicker gauge but rather battered Smith's Crisp's tin from the 1950's does anyone think that vintage tins may perform better than new ones? This is pretty ironic, given all the angst about the sonics one reads about JR4556 chips. I must have read 1,000 articles suggesting that one audio component or another could be "mind-blowingly" enhanced by replacing 4556 chips with something more highly thought-of by the author. Of course, its just fine, but people like to bad-mouth parts that are readily-available and cheap, even if they perform just fine. If you've misplaced your soldering iron, just try one of Behringer's offerings with a headphone jack. They are very fond of 4556 chips and chips like them... ;-) http://www.behringer.com/HA4700/index.cfm?lang=ENG I've found biscuit tins to sound crummy....sorry, couldn't resist it..... I bought a BTech headphone amp from Maplins, something like £ 30.00 Uses the 5532 chip which drives my AKG K270s and Koss Pro4AAs to quite sufficient level. Interestingly, it's the same chip that Meridian use in the headphone section of the 201 pre-amp. At the price, it didn't seem worth building one. With a simple modification, I made it into a passive "pre-amp" with separate headphone and amplifier volume controls to drive small active 'speakers. S. |
DIY headphone amplifier
"Serge Auckland" wrote in
message I bought a BTech headphone amp from Maplins, something like £ 30.00 This one? http://www.rock-grotto.co.uk/B-tech.htm Uses the 5532 chip which drives my AKG K270s and Koss Pro4AAs to quite sufficient level. I find this to be an interesting application of this chip. It does have has a lot of current drive capacity for a chip that is usually considered to be for line-level and low-level use. Interestingly, it's the same chip that Meridian use in the headphone section of the 201 pre-amp. 5532s are used all over the place, particularly for pro audio. At the price, it didn't seem worth building one. With a simple modification, I made it into a passive "pre-amp" with separate headphone and amplifier volume controls to drive small active 'speakers. How does it sound? ;-) |
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