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    Vintage v's New Dynakit Mark III - Advice please

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    brud

    Posts : 2
    Join date : 2017-01-31

    Vintage v's New Dynakit Mark III - Advice please

    Post by brud on Fri Feb 03, 2017 2:34 am

    Hello all

    I have recently purchased from eBay an original Dynakit Mark III , unassembled in its original box and am in the process of building same. I plan to purchase another Mark III to go with a Dynaco PAS 3 that I have also just purchased. I am substituting the SDS main PCB and the capacitor PCB from them as well ( in the Mk III)

    My dilema is this.

    Do I purchase a "modern" kit from Triode with current transformers, again substituting SDS PCB's x 2 ( Main and CapsPCB) OR do I wait and purchase an "old" MK III from eBay. The debate seems to resolve around the Output transformer , original V's current. I would appreciate the wisdom of the group to help me here !

    Here in Australia we are 240 Vac line voltage, Should I purchase a modern 240 Vac Power transformer for any units I run here in Australia OR run the 110Vac transformers from a step down PS ?

    If the groups wisdom is go 240Vac, I will have available for sale/trade x 1 NOS ( never used 110Vac Power Transformer) and x 1 Main original PCB also unused NOS. Maybe someone has a Mk III they want trade / sell for consideration for the Transformer/PCB ??

    On a slightly different note - Dynaco PAS 3. I have read the possible upgrades out there and frankly there is alot of controversy re how far one should go. I suspect the electrolytics and selenium is a no brainer, how do others feel about the rest. I have reservations that some of the upgrade paths are unfounded and not technically supported, eg : Phono upgrade on PAS 3. Is there a link to simple and objective upgrading of the PAS 3???

    Thankyou and appreciate your advice

    Cheers
    Bruce
    Sydney Australia




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    peterh

    Posts : 817
    Join date : 2012-12-25
    Location : gothenburg, sweden

    Re: Vintage v's New Dynakit Mark III - Advice please

    Post by peterh on Fri Feb 03, 2017 4:16 am

    brud wrote:Hello all

    I have recently purchased from eBay an original Dynakit Mark III , unassembled in its original box and am in the process of building same. I plan to purchase another Mark III to go with a Dynaco PAS 3 that I have also just purchased. I am substituting the SDS main PCB and the capacitor PCB from them as well ( in the Mk III)

    My dilema is this.

    Do I purchase a "modern" kit from Triode with current transformers, again substituting SDS PCB's x 2 ( Main and CapsPCB) OR do I wait and purchase an "old" MK III from eBay. The debate seems to resolve around the Output transformer , original V's current. I would appreciate the wisdom of the group to help me here !

    Here in Australia we are 240 Vac line voltage, Should I purchase a modern 240 Vac Power transformer for any units I run here in Australia OR run the 110Vac transformers from a step down PS ?

    If the groups wisdom is go 240Vac, I will have available for sale/trade x 1 NOS ( never used 110Vac Power Transformer) and x 1 Main original PCB also unused NOS. Maybe someone has a Mk III they want trade / sell for consideration for the Transformer/PCB ??

    On a slightly different note - Dynaco PAS 3. I have read the possible upgrades out there and frankly there is alot of controversy re how far one should go. I suspect the electrolytics and selenium is a no brainer, how do others feel about the rest. I have reservations that some of the upgrade paths are unfounded and not technically supported, eg : Phono upgrade on PAS 3. Is there a link to simple and objective upgrading of the PAS 3???

    Thankyou and appreciate your advice

    Cheers
    Bruce
    Sydney Australia





    Why don't you buy a MkIII from dynakitparts.com ? It's the original.
    http://www.dynakitparts.com/dynakit-products/amplifier-kits?product_id=210

    As for the PAS3, apart from Se replacement ( maybe a power board) see:
    http://triodeelectronics.com/sdslacabofor1.html

    just wait and listen. Use your ears. A lot of "snake-oil" mods is out there, some
    is beneign, some is detrimental.

    avatar
    Bob Latino
    Admin

    Posts : 2537
    Join date : 2008-11-26
    Location : Massachusetts

    Re: Vintage v's New Dynakit Mark III - Advice please

    Post by Bob Latino on Fri Feb 03, 2017 9:42 am

    I would buy a new Mark III kit from Dynakitparts rather than Triode Electronics. The Mark III kit costs $100 LESS from Dynakitparts. Also - recently Triode Electronics has had some issues with answering customer Emails and shipping parts promptly. Read this forum post below from about a year ago regarding Triode Electronics  ..

    Triode Electronics issues ...

    Bob
    avatar
    PeterCapo

    Posts : 421
    Join date : 2008-12-05

    Re: Vintage v's New Dynakit Mark III - Advice please

    Post by PeterCapo on Fri Feb 03, 2017 9:41 pm

    How unfortunate but true.  Triode USA’s customer service leaves a lot to be desired.  It’s really too bad, because they have some interesting stuff.

    I am a believer in channel-to-channel consistency.  With just one monoblock that was produced at a given point in time, you’d need another from close to that same time to reduce the likelihood of production variation that could end up making one monoblock sound a bit different from the other, even if you replace the PC boards.  I would not be inclined to mix one Mark III from fifty years ago with another Mark III from 2017.

    I would just get two new monoblocks from Kevin at Dynakitparts or from Roy.  Don't overlook Bob's Stereo 120.

    As far as the PAS goes, I can only suggest reading the most impressive and revealing studies at http://www.audioregenesis.com/
    avatar
    j beede

    Posts : 394
    Join date : 2011-02-07
    Location : California

    Re: Vintage v's New Dynakit Mark III - Advice please

    Post by j beede on Fri Feb 03, 2017 11:27 pm

    If you have your heart set on tube monoblocks... Here is what I would do in descending order of preference:

    1) Buy a vintage pair of matching MkIIIs to update/restore
    2) Buy a new pair of modern MkIII kits
    3) Find a second vintage MkIII to rebuild along with yours

    ...j

    I did #1 above a couple years back and would do it again.

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    PeterCapo

    Posts : 421
    Join date : 2008-12-05

    Re: Vintage v's New Dynakit Mark III - Advice please

    Post by PeterCapo on Sat Feb 04, 2017 1:12 am

    brud wrote:Is there a link to simple and objective upgrading of the PAS 3...

    Have a look here and be sure to look at the attachment to post #1: http://audiokarma.org/forums/index.php?threads/original-dynakit-dynaco-pas-preamp-a-low-cost-refresh.755387/

    gtech2020

    Posts : 1
    Join date : 2017-05-04

    Voltage difference between transformers

    Post by gtech2020 on Fri May 12, 2017 12:59 am

    Bob Latino wrote:I would buy a new Mark III kit from Dynakitparts rather than Triode Electronics. The Mark III kit costs $100 LESS from Dynakitparts. Also - recently Triode Electronics has had some issues with answering customer Emails and shipping parts promptly. Read this forum post below from about a year ago regarding Triode Electronics  ..

    Triode Electronics issues ...

    Bob

    Hi Bob

    We measured a 20 volt difference between the transformers at Dynakitparts and the ones from Triode Electronics. Here the voltage was 460v on Dyna vs. 480v on Triode. How does that impact performance?, I'm referring to mkiii transformers

    Dingojazz

    Posts : 50
    Join date : 2010-09-03

    What the heck...

    Post by Dingojazz on Thu Jun 01, 2017 6:52 pm

    do both, if you can.  Go for the VTA / Dynaparts MkIIIs while you wait for the second vintage III to show up. Meanwhile, build and enjoy the Dynaparts IIIs. I have these (octal version), and they're mighty fine amps.  
    Of course, the second vintage unit is unlikely to be an 'in the box' version, but at least they'll be roughly contemporary.  then you can "A/B" the systems and see what you like.  Sell the lesser ones to recoup costs.  Have fun!

    K.

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