Valve Itch phono - Page 56

Salas · 11th December 2011, 08:48 PM

It can be different in tube phono but it looks that's the good range, 18-22k.

merlin el mago · 11th December 2011, 09:01 PM

I have a couple of Shinkohs 18K, 22K are Vishay VSH1

merlin el mago · 12th December 2011, 10:08 AM

GB 1% RIAA caps Elfa answer:

Good morning Felipe

First item (65-456-44) now in stock, seconfd item (65-457-01) still not arrived here.
Hopefully this week.

Please advice how to proceed?

Best regards Mats

Export Sales Department
ELFA AB
SE-175 80 Järfälla
SWEDEN
E-mail: export@elfa.se
Phone: +46 8 580 942 30
Fax: +46 8 580 941 11
Internet: www.elfa.se

Felipe

woodturner-fran · 12th December 2011, 06:21 PM

Felipe: looks like after christmas maybe?

***************************************
I intend doing the resistor on mine later tonight - butI need to have a good detailed listen before I do the swap.

Just in case I'm confused here, or for others coming along after, you do mean changing R1 (47k) for something in the range of 18-22K?

Might be worth updating the sch or maybe the parts list to show the change....

Fran

Salas · 12th December 2011, 07:54 PM

Changing R1 is the test, yes. Can't be recommended for any SUT anyway.

woodturner-fran · 12th December 2011, 08:54 PM

So I replaced the 47k with 22k and have been listening for the last half an hour or so. Little enough change, perhaps a little more clean sounding, but not huge......

Fran

Salas · 12th December 2011, 08:56 PM

Did it change the HF level at all?

woodturner-fran · 12th December 2011, 10:02 PM

I don't think so

Salas · 12th December 2011, 10:28 PM

It did bring up HF for 47K VS 18-22K on scope and FFT, but it could be damping better on Itch's input and makes small difference. Still a little more cleaner is enough to keep it there. Is the new resistor quality the same as when it was 47K terminated?

woodturner-fran · 12th December 2011, 10:35 PM

Both resistors are more or less no-name metal films from farnell or mouser. Nothing special.

I've been listening more and I do think its a little cleaner alright - just more confident now of my first impressions. The other factor here is the cart - I'm using a benz L2....

Fran

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11th December 2011, 08:48 PM	#551
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	It can be different in tube phono but it looks that's the good range, 18-22k.

11th December 2011, 09:01 PM	#552
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	I have a couple of Shinkohs 18K, 22K are Vishay VSH1

12th December 2011, 10:08 AM	#553
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	GB 1% RIAA caps Elfa answer: Good morning Felipe First item (65-456-44) now in stock, seconfd item (65-457-01) still not arrived here. Hopefully this week. Please advice how to proceed? Best regards Mats Export Sales Department ELFA AB SE-175 80 Järfälla SWEDEN E-mail: export@elfa.se Phone: +46 8 580 942 30 Fax: +46 8 580 941 11 Internet: www.elfa.se Felipe

12th December 2011, 06:21 PM	#554
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	Felipe: looks like after christmas maybe? *************************************** I intend doing the resistor on mine later tonight - butI need to have a good detailed listen before I do the swap. Just in case I'm confused here, or for others coming along after, you do mean changing R1 (47k) for something in the range of 18-22K? Might be worth updating the sch or maybe the parts list to show the change.... Fran

12th December 2011, 07:54 PM	#555
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Changing R1 is the test, yes. Can't be recommended for any SUT anyway.

12th December 2011, 08:54 PM	#556
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	So I replaced the 47k with 22k and have been listening for the last half an hour or so. Little enough change, perhaps a little more clean sounding, but not huge...... Fran

12th December 2011, 08:56 PM	#557
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Did it change the HF level at all?

12th December 2011, 10:02 PM	#558
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	I don't think so

12th December 2011, 10:28 PM	#559
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	It did bring up HF for 47K VS 18-22K on scope and FFT, but it could be damping better on Itch's input and makes small difference. Still a little more cleaner is enough to keep it there. Is the new resistor quality the same as when it was 47K terminated?

12th December 2011, 10:35 PM	#560
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	Both resistors are more or less no-name metal films from farnell or mouser. Nothing special. I've been listening more and I do think its a little cleaner alright - just more confident now of my first impressions. The other factor here is the cart - I'm using a benz L2.... Fran