Mod your Beresford 7520

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24-04-2010, 01:17
Robscix

Yes, that is what I figured, I would just unsolder the leg instead of clipping it then I can reverse the mod if need be.
To note, I also seen the DIL socket pic and thought that was a great idea for reversing the mod or trying tou other types in this circuit position. Great stuff.
26-04-2010, 20:38
RoboCopper

AD8066 soldered with adapter factory made??

Hi,
While I am waiting for my LM4562NA I had some spares AD8066 which is not compatible for Beresford unless you have SOIC adapter. I got some adapter for AD8066 chip and after hard work with the solder I do like the sound which is coming out of chip.
Open, spacious, organic, plenty of highs, warm, although maybe I would not suggested to open systems, there is slight hiss or hum.
That is the reason I would like to purchase factory made AD8066 soldered to this adapter which is compatible to Beresford.
Anybody knows the online shop which sell that?
On ebay there is none.
Thank you.
26-04-2010, 20:48
RoboCopper

Where to buy LM4562NA which works properly?

Hi,
In the last month I ordered LM4562NA from ebay.
But the item was not working properly, there was a sound distortion in treble especially when listening vocal classical female recordings.
Luckily, I got refund from seller.
Few questions:
1. Shall I mention the name of that seller where I got this half working chip?
2. I am looking to buy LM4562NA from ebay but from seller which definitely sells stock which should work.
Can somebody check this link and suggest me reputable seller?
http://shop.ebay.co.uk/i.html?LH_Pre...=p3286.c0.m283

To me the best could be: this one ?
As the other chips which letter start with JR did not work properly.
Should it start with ER like others?
Can somebody suggest me which one I should go for?
I prefer to purchase on ebay, but any other reputable place on the net is fine.

Thank you

Rob
26-04-2010, 21:45
Maximum

I got some of my chips from farnell. Free delivery, and you can be more sure you aren't buying a fake. LM4562NA chips should be under 5 quid each.
26-04-2010, 21:53
Butuz

Hi Guys. Please help me avoid having to read 150 pages!!!!

My 7520 runs standard supplied PSU. What is the best upgraded PSU??? Can be shop bought or DIY.

Thanks

Butuz
26-04-2010, 23:16
Codifus

Quote:

Originally Posted by RoboCopper

Hi,
In the last month I ordered LM4562NA from ebay.
But the item was not working properly, there was a sound distortion in treble especially when listening vocal classical female recordings.
Luckily, I got refund from seller.
Few questions:
1. Shall I mention the name of that seller where I got this half working chip?
2. I am looking to buy LM4562NA from ebay but from seller which definitely sells stock which should work.
Can somebody check this link and suggest me reputable seller?
http://shop.ebay.co.uk/i.html?LH_Pre...=p3286.c0.m283

To me the best could be: this one ?
As the other chips which letter start with JR did not work properly.
Should it start with ER like others?
Can somebody suggest me which one I should go for?
I prefer to purchase on ebay, but any other reputable place on the net is fine.

Thank you

Rob

I bought my LM4562NAs and OPA2132 from digi key in the US;

http://search.digikey.com/scripts/Dk...62NA&x=28&y=17

Be sure to click the change country button on the very top right of the website.
27-04-2010, 07:41
StanleyB

I have added the Caiman power supply as an accessory on my website for those who have modified their TC-7520 and want to take advantage of the extra benefits the Caiman power supply offers. After lengthy testing of the Caiman PSU with the TC-7520, my beta testers have reported no problems, but significant SQ improvements.
The Caiman power supply won't benefit the TC-7520 with NE5532 opamps that much. But with LM4562 and THS4032 (i.e the opamps I have tried), the result is definitely one of the best and cheapest upgrades you can try. The usual money back guarantee applies if you can't hear any difference.
27-04-2010, 08:18
Butuz

Fantastic cheers Stan. I got my 7520 second hand of this forum and it came supplied with several op amps for me to try including LM4562.

Butuz
27-04-2010, 12:33
leo

Quote:

Originally Posted by StanleyB

I have added the Caiman power supply as an accessory on my website for those who have modified their TC-7520 and want to take advantage of the extra benefits the Caiman power supply offers. After lengthy testing of the Caiman PSU with the TC-7520, my beta testers have reported no problems, but significant SQ improvements.
The Caiman power supply won't benefit the TC-7520 with NE5532 opamps that much. But with LM4562 and THS4032 (i.e the opamps I have tried), the result is definitely one of the best and cheapest upgrades you can try. The usual money back guarantee applies if you can't hear any difference.

Agreed! it improved both line outs and also the headphone output for me, you'd have to spend much more in time and expense to better the improvement it brings
27-04-2010, 12:35
leo

Quote:

Originally Posted by RoboCopper

Hi,
While I am waiting for my LM4562NA I had some spares AD8066 which is not compatible for Beresford unless you have SOIC adapter. I got some adapter for AD8066 chip and after hard work with the solder I do like the sound which is coming out of chip.
Open, spacious, organic, plenty of highs, warm, although maybe I would not suggested to open systems, there is slight hiss or hum.
That is the reason I would like to purchase factory made AD8066 soldered to this adapter which is compatible to Beresford.
Anybody knows the online shop which sell that?
On ebay there is none.
Thank you.

Be careful with the AD8066 used in this dac, I found it quite touchy and measured some stability issues , it sometimes behaved and sometimes it didn't.
High level hiss and hum could be the sign of it going unstable
27-04-2010, 13:48
Codifus

Quote:

Originally Posted by Butuz

Fantastic cheers Stan. I got my 7520 second hand of this forum and it came supplied with several op amps for me to try including LM4562.

Butuz

Does your 7520 have the very 1st power supply or the one labelled Beresford.me? I was one of the very 1st owners of the 7520 and I was upgraded to the Beresford.me PSU. Improvements were significant.

If you have that original PSU (not labelled Beresford.me) then you *MUST* upgrade:)

CD
27-04-2010, 14:00
trailer

Quote:

Originally Posted by RoboCopper

Can somebody suggest me which one I should go for?
I prefer to purchase on ebay, but any other reputable place on the net is fine.

Thank you

Rob

http://markgrantcables.co.uk/shop/in...roducts_id=111

Another option.
27-04-2010, 20:39
Butuz

Quote:

Originally Posted by Codifus

Does your 7520 have the very 1st power supply or the one labelled Beresford.me? I was one of the very 1st owners of the 7520 and I was upgraded to the Beresford.me PSU. Improvements were significant.

If you have that original PSU (not labelled Beresford.me) then you *MUST* upgrade:)

CD

Hi There. The one I have is the Beresford.me 12v 1.5a.

Butuz
27-04-2010, 20:56
Butuz

Just took the 49720HA metal can out and put 4562NA in and I think I prefer it!

Butuz
27-04-2010, 21:12
Codifus

Quote:

Originally Posted by Butuz

Hi There. The one I have is the Beresford.me 12v 1.5a.

Butuz

So you have the one I upgraded too. You're in good shape. I just orderd the Caiman PSU so we'll see how that goes.

CD
27-04-2010, 21:19
Codifus

Quote:

Originally Posted by Butuz

Just took the 49720HA metal can out and put 4562NA in and I think I prefer it!

Butuz

You know that the 49720HA is supposed to be a refined LM4562NA?
Also, when swapping opamps you really need to let the system settle in. Constantly playing music for 3 weeks, yes, 3 weeks minimum, for starters.

I've put the LM4562NAs back into my system twice, and this is what I observed;

initial 1st week observation: clear but very 2 dimensional.
2nd week: systems loses clarity, sounds get somewhat muffled as if someone put a thick curtain in front of the soundstage.

3rd week: Revelation:) It's as if the LM4562s have finally gotten in sync with the 7520 circuit board. Music is clear, coherent, and 3 dimensional.

CD
08-05-2010, 22:19
RoboCopper

Hi to all good people on this forum.
I just got LM4562NA 3 days ago, and it sound beautiful, open, natural, with tighter bass and lively sound. Now I must burn in together with 7520.
Cant wait for it as well as to try even better more expensive upgrades.
What are other better Op Amps to try with open, sound with clear midrange, clean highs and tight bass where it needs to be rather on lighter not darker side?
Also, is it better to buy power supply (which one) or to build one yourself?
Thanks to all.
Regards
Rob
09-05-2010, 09:57
Covenant

Quote:

Originally Posted by RoboCopper

Hi to all good people on this forum.
I just got LM4562NA 3 days ago, and it sound beautiful, open, natural, with tighter bass and lively sound. Now I must burn in together with 7520.
Cant wait for it as well as to try even better more expensive upgrades.
What are other better Op Amps to try with open, sound with clear midrange, clean highs and tight bass where it needs to be rather on lighter not darker side?
Also, is it better to buy power supply (which one) or to build one yourself?
Thanks to all.
Regards
Rob

I like the AD826 op-amp which, IMHO, is a better all-rounder than the LM4562. With regard to power supplies I think its not an economic solution to build your own (unless your after the satisfaction). Stans suggestion is probably the best.
10-05-2010, 09:35
RoboCopper

Thanks Jerry,
Just a quick question in relation to AD826? Can you shortly describe the sound please?

Other questions:
1. As I am quite happy with LM4562NA, I would like to try THS4032, but where to buy it together with 8pin adapter SOLDERED together (once I tried to solder another chip, but my skills are not professional for that task). Any links would be appreciated, I prefer ebay purchase.
Is this safe "bet" to buy? Is it original? Anybody had any experience from that seller?

2. What is Stan suggestion for power supply, my Beresford has normal PS ( Unifive is written on it)

Regards
10-05-2010, 11:07
StanleyB

Quote:

Originally Posted by RoboCopper

2. What is Stan suggestion for power supply, my Beresford has normal PS ( Unifive is written on it)

My power supply is excellent, which is why I include it with the DAC :).
Of course, that doesn't mean that you can't try out other power supplies. I have customers using solar cells with a regulator and rechargeable batteries, or 12V car batteries, or CB radio linear power supplies, etc. My own latest experiment is with Maxwell super caps batteries.
10-05-2010, 11:11
RoboCopper

Quote:

Originally Posted by StanleyB

My power supply is excellent, which is why I include it with the DAC :).
Of course, that doesn't mean that you can't try out other power supplies. I have customers using solar cells with a regulator and rechargeable batteries, or 12V car batteries, or CB radio linear power supplies, etc. My own latest experiment is with Maxwell super caps batteries.

Hi Stan,
So this power supply which I have purchased with my 7520 is good (Unifive, 12v, 1.5A)? What PS is supplied with new 7520's?
Thank you for suggestions as well as well for excellent DAC's
Rob
10-05-2010, 11:21
StanleyB

Quote:

Originally Posted by RoboCopper

So this power supply which I have purchased with my 7520 is good (Unifive, 12v, 1.5A)? What PS is supplied with new 7520's?

UniFive 12V, 1.5A. Have you seen the stand alone power supplies of other DACs on the market and compared them to mine? If anyone has, it is highly noticeable that my power supplies are of far better quality as well than those of my competitors in this price range.
10-05-2010, 11:30
RoboCopper

No, unfortunately I have not seen other PS, I am new to DAC market, but my ears tell me that 7520 (and brain) is excellent sounding DAC with upgrade possibilities.
I wonder if building own PS (e.g.with toroidal PS) would improve the sound or
is in not simply economical in terms of sound benefit?
10-05-2010, 11:34
StanleyB

Quote:

Originally Posted by RoboCopper

I wonder if building own PS (e.g.with toroidal PS) would improve the sound or
is in not simply economical in terms of sound benefit?

Try a CB linear power supply and modify that one. I used one from Maplin to test the proof of concept.
10-05-2010, 13:50
leo

At least Stans PSU's don't burn out unlike some certain others :eyebrows:
10-05-2010, 14:56
RoboCopper

What about this question..

1. As I am quite happy with LM4562NA, I would like to try THS4032, but where to buy it together with 8pin adapter SOLDERED together (once I tried to solder another chip, but my skills are not up for that task). Any links would be appreciated, I prefer ebay purchase.
Is this safe "bet" to buy? Is it original? Anybody had any experience from that seller?
http://cgi.ebay.co.uk/Ths4032-Dual-O...item3358f1a69b
10-05-2010, 15:42
StanleyB

If you do a search in Google or the forum for Tirna Electronics you should be able to get the THS4032 from there. Many people on AoS uses their service for mods etc.
10-05-2010, 16:25
Covenant

Quote:

Originally Posted by RoboCopper

Thanks Jerry,
Just a quick question in relation to AD826? Can you shortly describe the sound please?

Other questions:
1. As I am quite happy with LM4562NA, I would like to try THS4032, but where to buy it together with 8pin adapter SOLDERED together (once I tried to solder another chip, but my skills are not professional for that task). Any links would be appreciated, I prefer ebay purchase.
Is this safe "bet" to buy? Is it original? Anybody had any experience from that seller?

2. What is Stan suggestion for power supply, my Beresford has normal PS ( Unifive is written on it)

Regards

Just bear in mind that my 7520 is modded-Murata regs and 15v supply-I dont know if some of the improvement is down to this but the AD826 IMHO has a better grip of deep bass (no bass boom) and a lovely 3 dimensional soundstage. For what they cost (about £4 each) its worth a try.
10-05-2010, 16:32
trailer

Quote:

Originally Posted by Covenant

Just bear in mind that my 7520 is modded-Murata regs and 15v supply-I dont know if some of the improvement is down to this but the AD826 IMHO has a better grip of deep bass (no bass boom) and a lovely 3 dimensional soundstage. For what they cost (about £4 each) its worth a try.

I would agree.
I tried most of the usual suspects and settled on the AD826. Everything sounds more musical and natural.
10-05-2010, 19:59
leo

The AD826 can drive harder loads than most other choices too, capacitive loads shouldn't cause it any problems so is less picky with interconnect cables etc
This chip will also really appreciate the better regulation giving better performance
11-05-2010, 06:37
Gazjam

Quote:

Originally Posted by trailer

I would agree.
I tried most of the usual suspects and settled on the AD826. Everything sounds more musical and natural.

Me too.
Tried loads of different ones to the point of nausea..
826 defo the best for me.

LM4562's dont sound as much like a good record player as the 826's!
11-05-2010, 07:03
StanleyB

I have been trying to borrow/buy two pieces of AD826 in order to try them out, but no luck so far. Anyone knows where I can find a pair of them?
11-05-2010, 07:13
RoboCopper

Quote:

Originally Posted by StanleyB

If you do a search in Google or the forum for Tirna Electronics you should be able to get the THS4032 from there. Many people on AoS uses their service for mods etc.

Thank Stanley,
I know, I read it on previous pages, they seem to be the very helpful and knowledgeable.
BUT, they do NOT sell it any more!!!!

Copy/Paste from them:
"We no longer sell these, due to a fault that we are still investigating."
"the only reason we stopped selling them on adaptors is that about 50% of them were instable and oscillated at MHz. This is because they are very high bandwidth and are trying to drive too much parasitic capacitance across the leads to the headphones or power amplifier in Audio DAC applications. there is a standard "fix2 for that but we have not had time to investigate it as yet so we are not selling them until we do sort the problem. It is quite possible that you would encounter the same problem with the one in the link."
"It is most likely fixable, but we haven't tried yet. We will put the news up on our website (www.tirnaelectronics.co.uk) when we have a fix for it. So keep checking our website. Apart from that, I cannot give a more firm answer of when we will have it ready for sale again."

I wonder where I can get them with adapters, and of course without the fault?
Anybody else had similar fault with THS4032?

Also, it seems that AD826 is maybe better option than LM4562NA? (for some ears of course)
11-05-2010, 07:20
StanleyB

Quote:

Originally Posted by RoboCopper

I wonder where I can get them with adapters, and of course without the fault?
Anybody else had similar fault with THS4032?

Also, it seems that AD826 is maybe better option than LM4562NA? (for some ears of course)

Good luck with your search for the THS4032. AD826? Heard of them, but never tried them. Everyone has their own preference, so buy up a set of all the opamps recommended on the forum and see which ones you like.
11-05-2010, 07:42
trailer

Quote:

Originally Posted by StanleyB

I have been trying to borrow/buy two pieces of AD826 in order to try them out, but no luck so far. Anyone knows where I can find a pair of them?

RS do them Stan:

http://uk.rs-online.com/web/search/s...%29#breadCrumb
11-05-2010, 08:04
StanleyB

Anyone hear with an RS account?
11-05-2010, 08:27
leo

Quote:

Originally Posted by StanleyB

I have been trying to borrow/buy two pieces of AD826 in order to try them out, but no luck so far. Anyone knows where I can find a pair of them?

You can have mine Stan, I've only got one though
11-05-2010, 08:40
StanleyB

Cheers Leo It's half of the problem solved :).
11-05-2010, 15:48
Peter Galbavy

Also seen the AD826 on Farnell for the same price, in case they are easier to deal with: http://uk.farnell.com/analog-devices...826/dp/1438583
12-05-2010, 08:06
RoboCopper

In my experience and opinion all those electrical merchants including Farnel, RS, digikey etc.. are cumbersome to deal with, due to their higher postage prices and some strange rules.
Maybe I used to eBay too much?
12-05-2010, 09:53
Peter Galbavy

As per my other thread I ordered a variety of pairs of opamps from Farnell and the standard delivery is free - the only thing is a minimum order of £20 for credit cards. E-mail said all posted last night. Not cumbersome at all :)
12-05-2010, 10:07
RoboCopper

Quote:

Originally Posted by Peter Galbavy

As per my other thread I ordered a variety of pairs of opamps from Farnell and the standard delivery is free - the only thing is a minimum order of £20 for credit cards. E-mail said all posted last night. Not cumbersome at all :)

Looks OK, I need to get £20 of order value, which should not be too hard.
How much was a delivery? Thanks
12-05-2010, 10:08
RoboCopper

Quote:

Originally Posted by RoboCopper

Looks OK, I need to get £20 of order value, which should not be too hard.
How much was a delivery? Thanks

I see now..........IT IS FREE :) :stalks:
12-05-2010, 13:04
Peter Galbavy

:-P
12-05-2010, 17:05
Butuz

1 Attachment(s)

Well I never thought I'd find myself doing this sort of thing!

I always thought the type of people that busied themselves with things like valve rolling, speaker cable rolling, interconnect rolling, etc simply did not have enough to do in work. :lol:

But lo! I find myself even more work shy....

...... op amp rolling!!! :scratch::eek::doh:

http://theartofsound.net/forum/attac...1&d=1273683936

:cool:

Butuz
12-05-2010, 17:39
Covenant

Careful Butuz it's addictive!
12-05-2010, 18:48
RoboCopper

Quote:

Originally Posted by Butuz

Well I never thought I'd find myself doing this sort of thing!

I always thought the type of people that busied themselves with things like valve rolling, speaker cable rolling, interconnect rolling, etc simply did not have enough to do in work. :lol:

But lo! I find myself even more work shy....

...... op amp rolling!!! :scratch::eek::doh:

http://theartofsound.net/forum/attac...1&d=1273683936

:cool:

Butuz

Like this photo! Very creative......must do one myself once I collect more opamps :)
12-05-2010, 19:09
Maximum

Just remember to give them some time if they are new chips, and if you use headphones remember both opamps have a say in the sound. You may even get tempted to remove the MLC 5/6 caps to see what that does, or try the cap mod in it's place. You're through the looking glass now mate. :)

I have placed 2/3 orders under £20 before and had no problem. Well apart from the credit card company thinking one was a fraud test payment. That could have been on my debit card though.
12-05-2010, 19:40
RoboCopper

Quote:

Originally Posted by Maximum

Just remember to give them some time if they are new chips, and if you use headphones remember both opamps have a say in the sound. You may even get tempted to remove the MLC 5/6 caps to see what that does, or try the cap mod in it's place. You're through the looking glass now mate. :)

I have placed 2/3 orders under £20 before and had no problem. Well apart from the credit card company thinking one was a fraud test payment. That could have been on my debit card though.

Hi, as English is not my 1st language, I am not sure what would mean "You're through the looking glass now mate" in previous context? (I did search for that phrase on Google, but still do not get it).
Anyway, would you suggest removing those caps mods first or shall I try 4-5 different OpAmps first?
Cheers
12-05-2010, 20:08
StanleyB

MLC5/6 affect the soundstage and focal presence. If you remove them you get a wider soundstage with a slightly laid back midrange.

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