MDAC First Listen (part 00100111)
- Thread starter Rosewind
- Start date
- Status
sam_cat
C'est Crounchifique!
JohnW
pfm member
There are 60 positions on the PCB for the larger Vishay thru hole types - but I'm also considering using x32 Vishay SMD 1206 sized resistors, but I've no experience of the SMD types WRT if they sound as good as the larger Vishay thru hole parts.
The SMD variants might also be cheaper then the larger thru hole parts.
I'm not suggesting that we populate all x60 PCB positions with the larger thru hole parts, but I can see the SMD positions having the potential to offer good results.
The SMD variants might also be cheaper then the larger thru hole parts.
I'm not suggesting that we populate all x60 PCB positions with the larger thru hole parts, but I can see the SMD positions having the potential to offer good results.
Steven Toy
Accuphase newbie
£120 is cheaper than L3 Fusion was. L3 Toy was an extra £50 for just 4 resistors!
That settles it, MDAC2 L2 24 x Vishays for me.
I'll stretch to 60 if there is a sonic benefit reported.
JohnW
pfm member
JohnW
pfm member
Dare I ask how many resistors there are in the VFET amps?
Are there likely to be semi-skimmed and full fat versions?
Far less then the MDAC2 design thankfully
I'll use Vishays in the VFET amps critical feedback network
Hi John,
Could this beastie provide true galvanic isloation?
http://www.sequoia.co.uk/product.php?id=1391
Seems it takes power from the source at the host end, and uses a psu at remote end which could be swapped for a linear unit or battery I guess..
Worth a look?
Could this beastie provide true galvanic isloation?
http://www.sequoia.co.uk/product.php?id=1391
Seems it takes power from the source at the host end, and uses a psu at remote end which could be swapped for a linear unit or battery I guess..
Worth a look?
JohnW
pfm member
Both L2 and L3 have a rear panel (5W miniXLR) Balanced headphone output as standard.
stefanwegner
Member
Hi John,
I'm not sure where I stand with payments, or even which version of the MDAC2 I am signed up for. Could you please send me an email to confirm my status?
Thanks very much!
I'm not sure where I stand with payments, or even which version of the MDAC2 I am signed up for. Could you please send me an email to confirm my status?
Thanks very much!
JohnW
pfm member
Stefan,
Renata has sent you a couple of emails this week answering your questions and confirming your payment status - you have replied to these Emails so I'm not sure what more I can add, I've copied part of the Emails below :-
"Thanks Renata!
ADC version will be a version without own chassis I understand. Any timeline for the full chassis development?
Kind regards,
Stefan
2015-07-08 12:56 GMT+02:00 renata cizmarova
Dear Stefan,
Just to give you a quick update. You have now paid the development installment up to L2 stage, this is the projects current development status so no further payments are required at this moment.
If you decide to go for L3 there will be one last development installment once John reaches that stage, but for the time being you have no outstanding payments.
Below is an updated chart with the features of the MDAC2 L2 / L3 versions:-
https://dl.dropboxusercontent.com/u/86116171/MDAC2 Versions 28 June 2015.jpg"
In answer to your most recent email today concerning the full width chassis, I don't wish to make any promises as my priority this side of Christmas is to complete the MDAC2 and VFET Amplifiers - once these two projects are completed then I can turn my full attention to the full width chassis as a priority project
Without making promises I might not be able to keep - it would be great if we could also supply the full width chassis at the same time as we release the MDAC2 PCB's but much depends on my pending visit to HK at the end of the month as to if this will be possible - otherwise we can source you a salvaged "Donor" MDAC1 if you don't wish to wait for the full width chassis....
Renata has sent you a couple of emails this week answering your questions and confirming your payment status - you have replied to these Emails so I'm not sure what more I can add, I've copied part of the Emails below :-
"Thanks Renata!
ADC version will be a version without own chassis I understand. Any timeline for the full chassis development?
Kind regards,
Stefan
2015-07-08 12:56 GMT+02:00 renata cizmarova
Dear Stefan,
Just to give you a quick update. You have now paid the development installment up to L2 stage, this is the projects current development status so no further payments are required at this moment.
If you decide to go for L3 there will be one last development installment once John reaches that stage, but for the time being you have no outstanding payments.
Below is an updated chart with the features of the MDAC2 L2 / L3 versions:-
https://dl.dropboxusercontent.com/u/86116171/MDAC2 Versions 28 June 2015.jpg"
In answer to your most recent email today concerning the full width chassis, I don't wish to make any promises as my priority this side of Christmas is to complete the MDAC2 and VFET Amplifiers - once these two projects are completed then I can turn my full attention to the full width chassis as a priority project
Without making promises I might not be able to keep - it would be great if we could also supply the full width chassis at the same time as we release the MDAC2 PCB's but much depends on my pending visit to HK at the end of the month as to if this will be possible - otherwise we can source you a salvaged "Donor" MDAC1 if you don't wish to wait for the full width chassis....
stefanwegner
Member
Stefan,
Renata has sent you a couple of emails this week answering your questions and confirming your payment status - you have replied to these Emails so I'm not sure what more I can add, I've copied part of the Emails below :-
"Thanks Renata!
ADC version will be a version without own chassis I understand. Any timeline for the full chassis development?
Kind regards,
Stefan
2015-07-08 12:56 GMT+02:00 renata cizmarova
Dear Stefan,
Just to give you a quick update. You have now paid the development installment up to L2 stage, this is the projects current development status so no further payments are required at this moment.
If you decide to go for L3 there will be one last development installment once John reaches that stage, but for the time being you have no outstanding payments.
Below is an updated chart with the features of the MDAC2 L2 / L3 versions:-
https://dl.dropboxusercontent.com/u/86116171/MDAC2 Versions 28 June 2015.jpg"
In answer to your most recent email today concerning the full width chassis, I don't wish to make any promises as my priority this side of Christmas is to complete the MDAC2 and VFET Amplifiers - once these two projects are completed then I can turn my full attention to the full width chassis as a priority project
Without making promises I might not be able to keep - it would be great if we could also supply the full width chassis at the same time as we release the MDAC2 PCB's but much depends on my pending visit to HK at the end of the month as to if this will be possible - otherwise we can source you a salvaged "Donor" MDAC1 if you don't wish to wait for the full width chassis....
So sorry John, but I haven't received any emails from Renata lately (her last email to me was June 13/2014). I've also never asked about a 'full width chassis'. Perhaps there is another Stefan?
JohnW
pfm member
Hi Stefan Wegner,
Oh our bad, it looks like Renata's made an error unless we just so happened to have two Stefans Emailing us this week - earlier this week I'd asked Renata to send you an update but I see its ts been sent to a "Stefan Kucher" instead.
I'm so sorry, I could not understand how we kept misunderstanding each other!
Sometimes its hard to live with a pretty Blond I'll ask Renata in the morning to reply to the correct Email address.
Oh our bad, it looks like Renata's made an error unless we just so happened to have two Stefans Emailing us this week - earlier this week I'd asked Renata to send you an update but I see its ts been sent to a "Stefan Kucher" instead.
I'm so sorry, I could not understand how we kept misunderstanding each other!
Sometimes its hard to live with a pretty Blond
I'll ask Renata in the morning to reply to the correct Email address.- Status