Roender's FC-100 Rev.1 Group-Buy

[pinnocchio]

Originally Posted by Rudi_Ratlos

Gentlemen,

the "last" participant of this round has paid, and I will order the PCBs tomorrow morning.
Most of you already know the procedure: the lead-time is 12 days, the shipping lasts 3-4 days, so I will have the PCBs by middle of October.

In the meantime I will prepare your letters and match the NJL-transistors.
I will send you the letters as soon as the PCBs have arrived.

Concerning the 4x34VAC / 50W BADEL-transformer:

The price of the "standard transformer" is about 21€.
I would like and order the following options:

1) reduced induction - 4€
2) magnetic shielding - 2,50€
3) shield winding - 3€

The price for the transformer will be about 31€ then.

Do you agree to my choices?

Best regards - Rudi_Ratlos

I'm good with that! I'll take one

Do

[evette]

Mr. Rudi ,are these transformers 117volts primary? Evette

[AndrewT]

A universal transformer wound as 50/60Hz, 115+115Vac is good for 110, 115, 120, 220, 230 & 240 Vac.

[evette]

Thanks Mr. Andrew T,,Mr. rudi can you put me down for 2.. Thanks Evette

[klaus-wick]

Hello,

as participant of the first group buy i already built the FC-100. It works well with four print-transformers 10VA, but why not improve?

My problem - like a few others - is, that i built mono-blocks.

So, what's about some feedback if there is any interest for transformers 20VA 2x34V, so that we are able to ask Rudi if he can order this ones too?

For my opinion there is no need to make these transformers nearly free from magnetic disturbing when the main transformer is a "normal (naked)" one.

We measured signal to noise in my test setup -made from wood- 100dB with these print transformers - and those are blowing more field than a toroidal core .......
greets from Ruhrpott / Germany

Klaus

[Rudi_Ratlos]

Gentlemen,

I ordered the PCBs this morning.
I was informed that due to Chinese National Day holidays, which will last from from September 30th to October 7th,
the production of the PCBs will be delayed by 1 week.

Concerning the transformer group-buy:

Klaus-Wick is of course right saying that the magnetic optimisation of the shunt's transformer alone will not yield any overall audible progress.

I will therefore only order one option: "magnetic shield", which adds 2.50€ to the transformer's costs.
The minimum wattage of any transformer that BADEL will produce on a customer's demand is 50W.

Since the weight of a transformer is less than 1Kg, shipping of one transformer will be 7€ worldwide.

Find enclosed a preliminary transformer group-buy list.

Best regards - Rudi_Ratlos

[Jazzzz]

Originally Posted by Rudi_Ratlos

Do you agree to my choices?

Yes i do

And while we're on it, where did you get these nice looking 2 x 25 VAC transformers from, Rudi?

Best regards, Basti

[mj777]

I'm in for 1 pc. - 4x34VAC / 50W 230V.

regards,
Marjohn

[Rudi_Ratlos]

Bastian, these are NUVOTEM / Talema encapsulated transformers.

Best regards - Rudi

[Rudi_Ratlos]

If I order more than 10 transformers, I will be able to offer you 10% price reduction .

Best regards - Rudi_Ratlos