D-LA2A Support Thread

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[silent:arts]

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Jun 4, 2004
Messages
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Location
Berlin, Germany
a useful looking link from that thread about grid stoppers:

http://www.groupdiy.com/index.php?topic=258781

but it's for the old prodigy pro forum version..

how do I make that link compatible with the one today?
 
Hi All ,
Anybody have a BOM for the Dual LA-2A for the european customers including where to buy tubes and T4B cells ??
And also the right type of tubes
Thank you all !!
Fabio
 
What happened to the build thread from S.A. first build?

I just looked for it a couple weeks ago referencing the PCB I have from that buy.
 
kazper said:
What happened to the build thread from S.A. first build?
I just looked for it a couple weeks ago referencing the PCB I have from that buy.
there never was a build thread except the one at Franks place.

Audioman said:
Anybody have a BOM for the Dual LA-2A for the european customers including where to buy tubes and T4B cells ??
And also the right type of tubes
here you find some links for the caps I used, and a BOM bernbrue once did.
T4Bs:
http://www.dripelectronics.com/t4b.html
http://www.studioelectronics.biz/sunshop/index.php?l=product_detail&p=1142
 
Would any la2a bom work for most of this build? I have found some US friendly BOM's for diffrent layouts and was wondering if most of it would be the same?

Eric
 
It'll probably work for the resistors at least. But most of the electrolytic caps may not fit on the board. Plus the PSU is different.

Rob
 
Thanks,

I actually orderd the PSU from the group buy so Im good to go there. As for caps I can figure that out pretty easily.

Im just being lazy Im sure I can get together a BOM onmy own pretty quickly.

Eric
 
Hi all,

Will this work for the relays??

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=Z767-ND

Eric
 
This thread is great news !!!

Now, to the questions :

Will the antek 1T250 work here?

Seems like an economical option...i think the voltages and VA´s are right
 
Great thread idea Silent Arts.

To everyone else, Silent Arts has been so helpful in my experience at the "Franks Place" forum for this project and I am glad the thread can continue here at groupdiy.

Now for my question, since these things put out huge amounts of gain, can I substitute input transformers and use 1:1 ratio transformers rather than the normal 1:4 to lower the amount of gain? Besides substituting the 100k gain pot for a the 25kpot/75k resistor as discussed at Franks Place , could I substitute 1:1 input transformers instead?  I have these Sowters lying around which are 600/600 ohms 1:1  and I would love to make use of them.

Thanks
 
Thanks,

I was wondering about the input iron also. Im considering using Lundhal transformers and Talked with Kevin the US distribitor and he suggested using 1:1 on the input as well.
Im working on a USA Bom and noticed I cant find the silver Mica caps. Does anybody have a usa source for those?

Eric
 
Thats what I figured but I thought that I would try and stay true to your original design.

Eric
 
[silent:arts] said:
Silvas said:
Will the antek 1T250 work here?
looks good to me, but you won't have any relay power for the bypass (actually those are "compressor in" relays.

Eric, your relays are fine.

But it is possible to steal some voltage from the heaters secondary to do this right? running the relays at 5v ? or i can use a second toroid (have lots of 10va anteks lying around).

Thanks !
 

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