DIY headphone amplifier
 

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


------------------------------------------------------
Birmingham Independent Photographers
http://bip.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.

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

DIY headphone amplifier
 

On Sat, 15 Apr 2006 09:49:34 +0100, "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


Scottish Shortbread may be OK, but if you can find it, the archetypal
tin for these kinds of project was the metal OXO tin. I've just
recently had to build a small in-line battery powered pre-amp for a
microphone. I used a very old Altoids cough sweet tin, and the
performance was all I could wish for. It just held two nine volt
batteries side by side and a small piece of Veroboard for the amp
itself - perfect.

d

--
Pearce Consulting
http://www.pearce.uk.com

DIY headphone amplifier
 

"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


--------------------------------------------------------
Dramatised - Photography
Granularised - Photographs
Black and White - Prints
Blue and White - Cyanotypes
http://jemraid.wikispaces.com/

DIY headphone amplifier
 

"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 09:49:34 +0100, "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


Scottish Shortbread may be OK, but if you can find it, the archetypal
tin for these kinds of project was the metal OXO tin. I've just
recently had to build a small in-line battery powered pre-amp for a
microphone. I used a very old Altoids cough sweet tin, and the
performance was all I could wish for. It just held two nine volt
batteries side by side and a small piece of Veroboard for the amp
itself - perfect.

d

--
Pearce Consulting
http://www.pearce.uk.com

Ahhhh a Cmoy clone, and I thought Penguins were biscuits.
http://tangentsoft.net/audio/cmoy-tutorial/

Jem


------------------------------------
Dramatised - Photography Granularised - Photographs
Black and White - Prints Blue and White - Cyanotypes
http://jemraid.wikispaces.com/

DIY headphone amplifier
 

On Sat, 15 Apr 2006 10:15:08 +0100, "Jem Raid"
wrote:


"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 09:49:34 +0100, "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


Scottish Shortbread may be OK, but if you can find it, the archetypal
tin for these kinds of project was the metal OXO tin. I've just
recently had to build a small in-line battery powered pre-amp for a
microphone. I used a very old Altoids cough sweet tin, and the
performance was all I could wish for. It just held two nine volt
batteries side by side and a small piece of Veroboard for the amp
itself - perfect.

d

--
Pearce Consulting
http://www.pearce.uk.com

Ahhhh a Cmoy clone, and I thought Penguins were biscuits.
http://tangentsoft.net/audio/cmoy-tutorial/

Jem

What on earth is that power supply circuit all about? He has two 9
volt batteries, just like me, but instead of using the centre point of
the batteries for ground, he has put in a pair of resistors - which
drain an extra couple of milliamps from the battery. If he had just
used a double pole switch for power, all that silliness would have
been avoided.

d

--
Pearce Consulting
http://www.pearce.uk.com

DIY headphone amplifier
 

"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 10:15:08 +0100, "Jem Raid"
wrote:


"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 09:49:34 +0100, "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


Scottish Shortbread may be OK, but if you can find it, the archetypal
tin for these kinds of project was the metal OXO tin. I've just
recently had to build a small in-line battery powered pre-amp for a
microphone. I used a very old Altoids cough sweet tin, and the
performance was all I could wish for. It just held two nine volt
batteries side by side and a small piece of Veroboard for the amp
itself - perfect.

d

--
Pearce Consulting
http://www.pearce.uk.com

Ahhhh a Cmoy clone, and I thought Penguins were biscuits.
http://tangentsoft.net/audio/cmoy-tutorial/

Jem

What on earth is that power supply circuit all about? He has two 9
volt batteries, just like me, but instead of using the centre point of
the batteries for ground, he has put in a pair of resistors - which
drain an extra couple of milliamps from the battery. If he had just
used a double pole switch for power, all that silliness would have
been avoided.

d

--
Pearce Consulting
http://www.pearce.uk.com

Well Don if I was you I'd ask him myself.

Jem :-)



-------------------------------------
Birmingham Independent Photographers
http://bip.wikispaces.com/

DIY headphone amplifier
 

On Sat, 15 Apr 2006 11:22:21 +0100, "Jem Raid"
wrote:

What on earth is that power supply circuit all about? He has two 9
volt batteries, just like me, but instead of using the centre point of
the batteries for ground, he has put in a pair of resistors - which
drain an extra couple of milliamps from the battery. If he had just
used a double pole switch for power, all that silliness would have
been avoided.

d

--
Pearce Consulting
http://www.pearce.uk.com

Well Don if I was you I'd ask him myself.

Jem :-)


I'm not sure I'm *that* bothered. It just seems a little odd to
increase the battery current drain by 50% when you really don't need
to.

d

--
Pearce Consulting
http://www.pearce.uk.com

DIY headphone amplifier
 

"Jem Raid" wrote in message
...

"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 10:15:08 +0100, "Jem Raid"
wrote:


"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 09:49:34 +0100, "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


Scottish Shortbread may be OK, but if you can find it, the archetypal
tin for these kinds of project was the metal OXO tin. I've just
recently had to build a small in-line battery powered pre-amp for a
microphone. I used a very old Altoids cough sweet tin, and the
performance was all I could wish for. It just held two nine volt
batteries side by side and a small piece of Veroboard for the amp
itself - perfect.

d

--
Pearce Consulting
http://www.pearce.uk.com

Ahhhh a Cmoy clone, and I thought Penguins were biscuits.
http://tangentsoft.net/audio/cmoy-tutorial/

Jem

What on earth is that power supply circuit all about? He has two 9
volt batteries, just like me, but instead of using the centre point of
the batteries for ground, he has put in a pair of resistors - which
drain an extra couple of milliamps from the battery. If he had just
used a double pole switch for power, all that silliness would have
been avoided.

d

--
Pearce Consulting
http://www.pearce.uk.com

Well Don if I was you I'd ask him myself.

Jem :-)



-------------------------------------
Birmingham Independent Photographers
http://bip.wikispaces.com/


This is called, "them as makes the suggestion, gets the job" :-)

Jem


----------------------------------------------------------
Dramatised - Photography Granularised - Photographs
Black and White - Prints Blue and White - Cyanotypes
http://jemraid.wikispaces.com/

DIY headphone amplifier
 

On Sat, 15 Apr 2006 11:24:27 +0100, "Jem Raid"
wrote:


"Jem Raid" wrote in message
...

"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 10:15:08 +0100, "Jem Raid"
wrote:


"Don Pearce" wrote in message
...
On Sat, 15 Apr 2006 09:49:34 +0100, "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


Scottish Shortbread may be OK, but if you can find it, the archetypal
tin for these kinds of project was the metal OXO tin. I've just
recently had to build a small in-line battery powered pre-amp for a
microphone. I used a very old Altoids cough sweet tin, and the
performance was all I could wish for. It just held two nine volt
batteries side by side and a small piece of Veroboard for the amp
itself - perfect.

d

--
Pearce Consulting
http://www.pearce.uk.com

Ahhhh a Cmoy clone, and I thought Penguins were biscuits.
http://tangentsoft.net/audio/cmoy-tutorial/

Jem

What on earth is that power supply circuit all about? He has two 9
volt batteries, just like me, but instead of using the centre point of
the batteries for ground, he has put in a pair of resistors - which
drain an extra couple of milliamps from the battery. If he had just
used a double pole switch for power, all that silliness would have
been avoided.

d

--
Pearce Consulting
http://www.pearce.uk.com

Well Don if I was you I'd ask him myself.

Jem :-)



-------------------------------------
Birmingham Independent Photographers
http://bip.wikispaces.com/


This is called, "them as makes the suggestion, gets the job" :-)

Jem

Fair enough - consider the job done, as above.

d

--
Pearce Consulting
http://www.pearce.uk.com