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Old 20th February 2008, 09:21 AM   #1
dan _s is offline dan _s  Israel
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Default Dynaco mkIII A431 op's

Hi all
i'm looking for a pair of output transformers to replace dynaco mkII outputs (A430) since they don't have 4ohm taps, which i need for my current speakers.
the most available and "drop fit" option is the A431 clone Triode electronics in chicago sell. triodeelec used to sell magnaquest trannies but now they are unlabeled. they claim them to be good at least as originals.
does anyone have experience with the Triode electronics dynaco clones? quality? electrical measurements?
any other options for replacement transformers?

mr Ned Carlson?

thanks
dan
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Old 20th February 2008, 10:01 AM   #2
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Hi Dan,

Can't provide you with any electrical measurements but I have used both the A470 (Dynaco 70) and the A431 (MK 3). The A431 in particular is a big unit!

They are both well built, robust transformers. They appear well made with nice long, quality leads. They run cool.

As far as the sound goes - well, they sound great to me, no complaints at all.

I have dealt with Matt at triode on quite a few occasions and he has always been honest, helpful and straightforward to deal with.

Hope this helps,

Rob
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Old 21st February 2008, 06:52 PM   #3
dan _s is offline dan _s  Israel
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Hi Rob, i use now A430 which are exactly the same size as the A431's, so no problems fitting. do you have originals or replicas?
thanks for the input
dan
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Old 22nd February 2008, 01:53 AM   #4
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hey-Hey!!!,
There is another winder of the A431 to consider, Heyboer TX in Michigan. Their price on them is better than the Dynaclone and quality is excellent.

AFIK, there was a minor difference in U-L tap location between the two, with the 430's being a few percent lower.
cheers,
Douglas
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Old 22nd February 2008, 03:24 AM   #5
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Hi Dan,

I have the triode replicas.

Rob
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Old 22nd February 2008, 06:42 AM   #6
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Default Re: Dynaco mkIII A431 op's

Quote:
Originally posted by dan _s
...triodeelec used to sell magnaquest trannies but now they are unlabeled. they claim them to be good at least as originals.
does anyone have experience with the Triode electronics dynaco clones? quality? electrical measurements?
any other options for replacement transformers?

If you visit Shannon Park's www.diytube.com and dig around--- they had done a series of tests on (if I remember correctly) the Z-565 EL-84 dynaco transformers and several clones\replicas. It might give you some insights to consider and take into account.

We quit making the ST 70 and MK III outputs some time ago. I have some coil stock of the large 120 watt A-451 outputs as well as a few of the ST-35 (EL-84) outputs. In the future I want to do a limited edition run of some ST-70 outputs but with a really hotrodded coil design and state of the art core laminations--- while maintaining the same impedances and power ratings and etc. But that will be off in the future a bit.

msl
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Old 22nd February 2008, 06:56 AM   #7
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Quote:
Originally posted by Bandersnatch
There is another winder of the A431 to consider, Heyboer TX in Michigan. Their price on them is better than the Dynaclone and quality is excellent.
So just who are these folks? I've seen you mention them numerous times. Have they ever produced any transformers of their own or are they just the Kinkos of the transformer world?

se
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Old 22nd February 2008, 09:23 PM   #8
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Quote:
Originally posted by Steve Eddy


So just who are these folks? I've seen you mention them numerous times. Have they ever produced any transformers of their own or are they just the Kinkos of the transformer world?

se
You make it sound like producing the vintage designs is a bad thing. I have used them to produce modified vintage units that were either( though usually both )un-sourceable or ridiculously expensive elsewhere. For example, their multiple tap 10k output based on the Peerless S-265-Q cost me about $100 each. One of the two other known sources refused to modify it, and wanted more than $300 per copy, and the other was of similar 3:1 cost disadvantage.

If you'd like to discuss their own designs, I suggest you speak to them pesonally and lay out your needs and expectations and see how they'd work for you.
cheers,
Douglas
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Old 23rd February 2008, 12:16 AM   #9
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Quote:
Originally posted by Bandersnatch


....based on the Peerless S-265-Q....
Peerless transformers has a federally registered trademark which identifies our products. I would appreciate it if you restrained yourself from using our brand name and\or it's protected trademarks.

Please don't abuse or misappropiate our goodwill for your unauthorized knockoffs.

Anyone who would be interested in authentic Peerless products is more than welcome to contact us at MagneQuest.

msl
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Old 23rd February 2008, 01:34 AM   #10
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Quote:
Originally posted by MQracing


Peerless transformers has a federally registered trademark which identifies our products. I would appreciate it if you restrained yourself from using our brand name and\or it's protected trademarks.

Please don't abuse or misappropiate our goodwill for your unauthorized knockoffs.

Anyone who would be interested in authentic Peerless products is more than welcome to contact us at MagneQuest.

msl
Dear Mike,
I don't need your authorization. There is nothing owned by you to authorize which has any bearing on me taking apart vintage output Iron, modifying it, and publishing those details. You may wish there was, but I am afraid that your wishes are just not a valid reason that I feel any need to act upon.

We've been all over this, if you have something new to say, please feel free to contact me; I'll be most happy to listen and consider your request.
Best Regards,
Douglas
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