[mdabro]

Thanks, Runeight. I have wrotten e-mail to Jeff.

Marek

 

[wiatrob]

Quote:

Originally Posted by pabbi1 /img/forum/go_quote.gif Just for grins, what trafo spec would be needed to run 2 boards at the default config?

You mean for like:

SOHA II - Super SE Hybrid - Page 17 - Head-Fi: Covering Headphones, Earphones and Portable Audio

 

[GeWa]

NANANANANANAAAA !!

Received a greenish looking board today from Jeff Rossel

Regards

 

[pabbi1]

Quote:

Originally Posted by wiatrob /img/forum/go_quote.gif You mean for like: SOHA II - Super SE Hybrid - Page 17 - Head-Fi: Covering Headphones, Earphones and Portable Audio

Yeah, except I will actually build it...

 

[mdabro]

Thanks, Runeight. I have wrotten email to Jeff.

Marek

 

[Ferrari]

Quote:

Originally Posted by GeWa /img/forum/go_quote.gif NANANANANANAAAA !! Received a greenish looking board today from Jeff Rossel Regards

So... there is a small chance that you are the second Europeans SOHAII builder? NANANANANAAA...A

 

[espressogeek]

I received my board this weekend and I am very excited. I am finishing up the BOM after work today.
I'll probably go with Panny FC caps because they are available for everything except the 160v positions.

Will 1/4 watt resistors fit in this thing all the way around? I already have several and I would like to keep my stock the same.

I order some 6922 JAN-Phillips tubes to start with. Hopefully they work well.

Are there any worthwhile upgrades to the smaller non-electrolytic that are a good bang for the buck?

Also, what toroid should I get. The one in the BOM is available from partsexpress but is there a suitable one that I can pickup from either Mouser or Digikey that will let me run the higher heater current later like Ferrari did? ( I think this is right )

Thanks!

 

[wiatrob]

From the Power Supply parts list page:

182J15

 

[espressogeek]

Quote:

Originally Posted by wiatrob /img/forum/go_quote.gif From the Power Supply parts list page: 182J15

Sorry, somehow I missed that. Would this have the extra gusto that is needed for the higher voltage option that I have seen mentioned around here? I am still a bit fuzzy on transformers.

Also, I just looked and it is twice the price of the one over on partsexpress!

http://www.partsexpress.com/pe/showd...ewRand=8170223

 

[04BluMach]

Quote:

Originally Posted by GeWa /img/forum/go_quote.gif NANANANANANAAAA !! Received a greenish looking board today from Jeff Rossel Regards

Got back from a week long trip - opened up the mailbox and guess what was waiting for me from Jeff

......... a greenish looking board just like GeWa received

Now I guess better finish up the my BOM determine what I have on hand and get some parts on order that I need right away.

Will probably go with some inexpensive new 12AU7 types (EI or JJ) just for check out and also snag a couple NOS 5963s.

Anyone have some recommendations on the NOS 5963's?

Thanks to Runeight and Jeff for the greenish boards! Looking forward to building this up....

 

[Ferrari]

The 182J15 from the BOM is a 30VA transformer.
To run higher heater current (later) you can better go for a 50VA transformer, for example 182K15 at Mouser. 80VA is cheaper

.
The price at Mouser is much too high

, maybe you can find it cheaper else where.

 

[espressogeek]

Thanks Ferrari. Now that I know what I am looking for I will finish my BOM.

Quote:

Originally Posted by Ferrari /img/forum/go_quote.gif The 182J15 from the BOM is a 30VA transformer. To run higher heater current (later) you can better go for a 50VA transformer, for example 182K15 at Mouser. 80VA is cheaper . The price at Mouser is much too high , maybe you can find it cheaper else where.

 

[Ferrari]

For those living in the US and looking for a 50VA toroidal transformer for your SOHA II, you might take a look at the Antek AN-0515.
Comparing to the 30VA Hammond 182J15 from the BOM, the price of the Antek AN-0515 is very reasonable at US$ 13 / piece + US$ 10 shipping cost within the US.

 

[holland]

I have one of those, but decided not to use it because of the prototype HV perfboard not leaving any room for that transformer in the case I chose.

Just FYI, for those in consideration. The Antek over rates their voltage. Most transformers rate voltage loaded. The Antek rates voltage unloaded. The VA is accurate though.

It also is a bit larger than others.

There's nothing really wrong with the Antek, other than the voltage. With the old B+ it was pulling voltage a bit under the 60V spec'd where other transformers were coming in around 63V or so, loaded. With the new adjustable HV, it's less of an issue.

 

[pinkfloyd4ever]

Quote:

Originally Posted by Ferrari /img/forum/go_quote.gif For those living in the US and looking for a 50VA toroidal transformer for your SOHA II, you might take a look at the Antek AN-0515. Comparing to the 30VA Hammond 182J15 from the BOM, the price of the Antek AN-0515 is very reasonable at US$ 13 / piece + US$ 10 shipping cost within the US.

Oh ya fo sho!! I'm trying to decide on a diy speaker amp kit and have decided to use one of their toroidal transformers. Since I've never bought a transformer other than a wallwart, the only transformer companies I've heard of around here are hammond, avel, amveco, and plitron. I only heard of Antel a week or so ago (ERRORRR

), but after reading alot on diyaudio.com and 41hz.com I've found that apparently they sell quality toroidals for significantly less $ than Avel and WAY less than Plitron. For some reason most of us headphone diyers haven't 'discovered' them...till recently

Much better selection than Avel too. And to add to what holland said, you can see their loaded voltages by clicking on the red link to each model's datasheet. And no I don't work for em

EDIT: while we're on the topic, I'm confused about the difference in a transformer with dual secondaries and a true center tapped secondary. How does it affect their ratings (voltages and VA) and can they both be used either in parallel or series? I really don't know much so I'm prob calling something wrong