.....either you do it or you get somebody else to, but there's any number of
ways to attenuate a rampant 'vinyl' signal it seems (pending the arrival of
some Alps pots - see elsewhere)!

See this whole side recording I did last night:

http://www.moirac.adsl24.co.uk/showntell/Marlene-AT.jpg

And here's the same side I did just now:

http://www.moirac.adsl24.co.uk/shown...ne-Ortofon.jpg

The *only* thing that is different between the two recordings is the cart I
used in each case - the first one is an AT OC5 with an output of 0.4mV; the
second is an Ortofon MC200U with an output of only 0.09mV!

Surprising, ain't it? I thought it might work but not to such an extent!!

:-)

OK, that's all - back to what you were doing!!

On Tue, 20 Oct 2009 16:43:34 +0100, "Keith G"
wrote:

....either you do it or you get somebody else to, but there's any number of
ways to attenuate a rampant 'vinyl' signal it seems (pending the arrival of
some Alps pots - see elsewhere)!

See this whole side recording I did last night:

http://www.moirac.adsl24.co.uk/showntell/Marlene-AT.jpg

And here's the same side I did just now:

http://www.moirac.adsl24.co.uk/shown...ne-Ortofon.jpg

The *only* thing that is different between the two recordings is the cart I
used in each case - the first one is an AT OC5 with an output of 0.4mV; the
second is an Ortofon MC200U with an output of only 0.09mV!

Surprising, ain't it? I thought it might work but not to such an extent!!

:-)

OK, that's all - back to what you were doing!!



Why did you leave that first one slamming so hard for a whole side? I
presume the two big blips in the second one were scratches.

d

"Don Pearce" wrote in message
...
On Tue, 20 Oct 2009 16:43:34 +0100, "Keith G"
wrote:

....either you do it or you get somebody else to, but there's any number
of
ways to attenuate a rampant 'vinyl' signal it seems (pending the arrival
of
some Alps pots - see elsewhere)!

See this whole side recording I did last night:

http://www.moirac.adsl24.co.uk/showntell/Marlene-AT.jpg

And here's the same side I did just now:

http://www.moirac.adsl24.co.uk/shown...ne-Ortofon.jpg

The *only* thing that is different between the two recordings is the cart
I
used in each case - the first one is an AT OC5 with an output of 0.4mV;
the
second is an Ortofon MC200U with an output of only 0.09mV!

Surprising, ain't it? I thought it might work but not to such an extent!!

:-)

OK, that's all - back to what you were doing!!



Why did you leave that first one slamming so hard for a whole side?



I didn't 'leave it slamming'! I have no way of attenuating the signal 'til I
get the Alps and fix my 'pot in a box' - is what my whole previous thread
was about!!



; presume the two big blips in the second one were scratches.


No, the record isn't scratched; they are 'pops' - and sound like this
(actual):

First one: http://www.moirac.adsl24.co.uk/showntell/Pop1.mp3

Second one: http://www.moirac.adsl24.co.uk/showntell/Pop2.mp3


They are easily fixed - I 'draw' through them with a 'pencil' or even draw
the wave by hand in Sound Forge - see Before and After on the first pop
he

http://www.moirac.adsl24.co.uk/showntell/Pop1Before.jpg

http://www.moirac.adsl24.co.uk/showntell/Pop1After.jpg

Good, innit?

****, my posts are *comprehensive and entertaining* are they not...??

;-)

In article ,
Keith G wrote:
I didn't 'leave it slamming'! I have no way of attenuating the signal
'til I get the Alps and fix my 'pot in a box' - is what my whole
previous thread was about!!

Make an attenuator out of fixed resistors. Only reason to go for a posh
pot is the channel balance is likely better than a cheap one. But fixed
resistors will better them both.

--
*There are 3 kinds of people: those who can count & those who can't.

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:
I didn't 'leave it slamming'! I have no way of attenuating the signal
'til I get the Alps and fix my 'pot in a box' - is what my whole
previous thread was about!!

Make an attenuator out of fixed resistors. Only reason to go for a posh
pot is the channel balance is likely better than a cheap one. But fixed
resistors will better them both.


I did consider that and probably have already got some suitable/unused
resistors here, but dismissed it - certainly for long-term use - due to all
the variables. But you've given me the idea for an interesting little
fabrication - if I built a box with rows of 'in and out' phono sockets
connected to a number of fixed resistances, what values would you suggest?

On Tue, 20 Oct 2009 19:32:41 +0100, "Keith G"
wrote:


"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:
I didn't 'leave it slamming'! I have no way of attenuating the signal
'til I get the Alps and fix my 'pot in a box' - is what my whole
previous thread was about!!

Make an attenuator out of fixed resistors. Only reason to go for a posh
pot is the channel balance is likely better than a cheap one. But fixed
resistors will better them both.


I did consider that and probably have already got some suitable/unused
resistors here, but dismissed it - certainly for long-term use - due to all
the variables. But you've given me the idea for an interesting little
fabrication - if I built a box with rows of 'in and out' phono sockets
connected to a number of fixed resistances, what values would you suggest?


I reckon steps of 6dB (halving the voltage each time) would be about
right. You need a resistor in series (R1) followed by another to
ground (R2). By keeping the sum of them at about 10k, you will get
the best performance.

Att. R1 R2
6dB 5.1k 5.1k
12dB 8.2k 2.7k
18dB 8.2k 1.2k
24dB 8.9k 620 ohms

Not exact values, but the nearest that give standard resistors.

d