DIY Sony VFET pt 2 (N-Channel Build)

[Ylab]

Then there is the matter of building a mezzanine board to translate the Edcor pinout to the Jensen..

That would be nice to have a mezzanine board that can adapt the cinemag and the Jensen transformers!

 

[flg]

Why don't we see the drain of Q1 on gnd and the lower supply on -36? This would keep power supply noise off the Drain of the VFET... Is it the distortion character in the right phase or?

 

[Nelson Pass]

Because the power supply V- is attached to Earth ground at the AC outlet.

Unfortunately.

However, it has given us another approach to supply filtering.

 

[Nelson Pass]

Has anyone considered playing with the edcor (xformer rolling), or already done it?

Yes, the Jensen and Cinemag 600:600 transformers previously used
worked well.

The downside is less gain, but also using them as auto-formers has
limited their operation to non-inverting as in the N channel version.

That said, I always go by a) Price and b) What ZM prefers.

 

[flg]

Thank you Nelson

 

[myleftear]

a) Price and b) What ZM prefers.

These parameters seem reasonable …

Will first build it by the book anyway, and then stick to the a/b rule as of above, even if mZM had a point about the edcors…

Thank you very much!

 

[wwwtttwww]

Edcor +1.

Edcor has online shop. People just need to select, pay and wait.

Other two don't have online shop. I emailed, and asked price, finally got a quote and wanted to pay and never got back how to proceed with payment. Then I gave up and just ordered Edcor.

 

[myleftear]

Edcor +1.

Edcor has online shop. People just need to select, pay and wait.

Other two don't have online shop. I emailed, and asked price, finally got a quote and wanted to pay and never got back how to proceed with payment. Then I gave up and just ordered Edcor.

You (that is, all of us wanting some) probably have to find a representative (with an online-shop). Being in europe, i only know european guys…

 

[Zen Mod]

World is small

Especially if you count that getting goods is taking some time

in fact - everything is easy when obtaining something new, in current production, and delays are easy to endure

problem is when you want to find something not in current production...... often happens that even "money not object" approach is not enough - when there is no supply ..... and demand is always greater

old speakers/drivers, for instance

 

[TungstenAudio]

Audio Transformers By Cinemag Inc.
Best is to contact CineMag through their email address. Be patient, they are very busy catching up with demand.
I order my Jensen transformers from Cable Solutions. Good response and shipping times.

 

[Zen Mod]

...... What ZM prefers.

that should be universal criteria here, in Papaland

 

[wwwtttwww]

Thank you for the info.

 

[vitorio]

that should be universal criteria here, in Papaland

I agree completely

 

[thompsontechs]

that should be universal criteria here, in Papaland

The bearded ones stick together....

 

[Nelson Pass]

I shaved this morning, something I do when it gets itchy.

 

[Zen Mod]

my Beard is soft, from both sides

same as I am

 

[HumbleDeer]

This only makes me want to put you in a little cat house more now! Come on, ACCEPT THE PETS.

 

[Monk55]

All “N” parts on board…both OS & sinks Lapped-in.

 

[rif]

How did you do the lapping? Does it require expensive tools?

 

[Monk55]

Very Flat piece of steel…220 grit….patience. Don’t let your paper clog i.e. clean often. Insure you countersink heatsink holes slightly after. I also use bottoming tap & vacuum.