The Phonoclone and VSPS PCB Help Desk - Page 202

240z4u · 22nd June 2012, 02:23 PM

Honestly, there isn't anything "wrong" but it just doesn't sound like I want it to. Its really a great sounding setup, but not quite "there". The caps may do the trick.

Evan

Woody1911a1 · 22nd June 2012, 11:58 PM

Quote:

Originally Posted by 240z4u

Honestly, there isn't anything "wrong" but it just doesn't sound like I want it to. Its really a great sounding setup, but not quite "there". The caps may do the trick.

Evan

i felt the same way when i built mine using a wima mkp on the output . then i installed , i think it was jensen poly's and BIG improvement .

i've got the mundorf's here and going to try them when time allows

cheers Woody

240z4u · 23rd June 2012, 02:22 AM

Thanks Woody. Please keep us updated! I definitely want a bit more top end "sparkle". It really is a great phono stage though. I can get mundorfs locally, so that's particularly interesting.

Evan

Mr Onion · 23rd June 2012, 09:29 AM

Richard. Having read Happiness is Z Shaped I was wondering about using z foils as R1 in my PhonoClone. Not cheap I know but worth it? What do you think?

dimkasta · 23rd June 2012, 07:22 PM

Well it s when people start talking about miraculous changes that I try to hold a small basket... Especially the RF suppressing change described is a bit suspicious...
It could be a nice test though. Lots of people regard them very highly. If I had easy access to some I would give them a try.
Perhaps I will try to get some with my next order and try them along with my next mod to increase the gain a bit

masiebers · 24th June 2012, 03:26 AM

Quote:

Originally Posted by dimkasta

My approach would be to expose some nice and comfortable pads so that I could solder and desolder easily the resistors directly to them

Dimitri

Dmitri, Thanks for your thoughts, but do you think the board is strong enough to withstand three or four desolder/solder's per year?

Mark

rjm · 24th June 2012, 07:09 AM

I would allow 3 de/solder cycles, max, total. Any part you might want to change more often should be mounted on standoffs. You can buy little gold pins for the purpose, or simply solder a wire lead into the pads, and solder the component to the wire lead stub.

rjm · 24th June 2012, 07:22 AM

Quote:

Originally Posted by Mr Onion

Richard. Having read Happiness is Z Shaped I was wondering about using z foils as R1 in my PhonoClone. Not cheap I know but worth it? What do you think?

The output noise of the phonoclone is defined by the op amp, not the input resistors, so there is technically no advantage in using low noise resistors.
A bulk foil resistor also has very low inductance, which can have certain advantages re. RFI interference or feedback stability.

My opinion? I don't think the improvement will be worth the cost in this application. If I was going to try, though, I'd go with the Vishay as being half the price and properly encapsulated as well.

Mr Onion · 24th June 2012, 09:41 AM

Thanks Richard. Thats saved me a fair wad (I'd have needed 4 as I need 5ohms on the input side)

dimkasta · 24th June 2012, 10:27 AM

Quote:

Originally Posted by masiebers

Dmitri, Thanks for your thoughts, but do you think the board is strong enough to withstand three or four desolder/solder's per year?

Mark

No. As Richard verified.

Quote:

or simply solder a wire lead into the pads, and solder the component to the wire lead stub.

I was talking about something like that.

Another approach I have seen around is soldering the resistors directly on the RCA sockets.

22nd June 2012, 02:23 PM	#2011
240z4u diyAudio Member Join Date: Dec 2004 Location: Madison WI	Honestly, there isn't anything "wrong" but it just doesn't sound like I want it to. Its really a great sounding setup, but not quite "there". The caps may do the trick. Evan __________________ Yeah... it seemed like a good idea at the time.

23rd June 2012, 02:22 AM	#2013
240z4u diyAudio Member Join Date: Dec 2004 Location: Madison WI	Thanks Woody. Please keep us updated! I definitely want a bit more top end "sparkle". It really is a great phono stage though. I can get mundorfs locally, so that's particularly interesting. Evan __________________ Yeah... it seemed like a good idea at the time.

24th June 2012, 07:09 AM	#2017
rjm Richard Murdey diyAudio Member Join Date: May 2004 Location: Kyoto Blog Entries: 75	I would allow 3 de/solder cycles, max, total. Any part you might want to change more often should be mounted on standoffs. You can buy little gold pins for the purpose, or simply solder a wire lead into the pads, and solder the component to the wire lead stub. __________________ RJM Audio (phonoclone.com / G+)

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23rd June 2012, 09:29 AM	#2014
Mr Onion diyAudio Member Join Date: Feb 2012	Richard. Having read Happiness is Z Shaped I was wondering about using z foils as R1 in my PhonoClone. Not cheap I know but worth it? What do you think?

23rd June 2012, 07:22 PM	#2015
dimkasta Dimitris diyAudio Member Join Date: May 2010 Location: Athens	Well it s when people start talking about miraculous changes that I try to hold a small basket... Especially the RF suppressing change described is a bit suspicious... It could be a nice test though. Lots of people regard them very highly. If I had easy access to some I would give them a try. Perhaps I will try to get some with my next order and try them along with my next mod to increase the gain a bit

24th June 2012, 09:41 AM	#2019
Mr Onion diyAudio Member Join Date: Feb 2012	Thanks Richard. Thats saved me a fair wad (I'd have needed 4 as I need 5ohms on the input side)