Profet Amplifier

[vizion]

by that, you mean push pull f4, Jacco ?

[jacco vermeulen]

Si, Senor.

Some American remakes are better than the French original movies.
Not many , some.

[miklos]

"because a lot of fake 2SK1058 & 2SJ162 out there"

Anybody knows how to recognize the fake Hitachi Mos Fets?

[jacco vermeulen]

How about printing out the datasheet and measuring a sample ?

Both Rds(on), the various capacitances, and the power handling capability are easy enough to determine.
Plus Vgs level is the first giveaway, who would stick a Lateral die in a fake device ?

[gaborbela]

HI
I finished my ProFet amplifier ,At the firs time I powered up and everything was working fine .The sound excellent much much better than how I expected . I'm using Exicon mosfet , Caddock resistors , pure silver wire .
Now I'm planing to build two more channel and used in a balanced mode .
If someone has information how to connect the two channel together so I can use it in a balanced mode please let me know .
I know the Profet has another version called Triphon that amplifier can be bridged and used in a balanced mode .
Do I have to build two more channel so I can used in a balanced mode? I have power enough now in stereo mode to .
Or the two channel bridged only reason for more power ?
I can buy THAT 1200 High CMRR Balanced Line Receiver JRDG - 2PCS from Ebay but I need help I don't know how to use it .
Thanks for any information .

Greetings

[miklos]

Gabor,
What you need for bridging amplifiers is precise the opposite of the THAT 1200 ,which is balanced in/unbalanced out.

[gaborbela]

Hello Miklos

After your name I think you are Hungarian .
I understand I need exact the opposite of that OPA but what type or any schematic somewhere?
I can build it if there is a schematic or some information but with out that I'm lost .
Can you write to me to mathelaszlo2@yahoo.ca
In case if you better in Hungarian please write Hungarian.
Thank you very much .
Greetings

[gaborbela]

Hello
I jus check the data of the THAD120X and these receive balanced in . So for the balanced input I think these should be OK.
So for my firs question these would be the answer .
For th secon question how to bridge to amplifier together I still don't know the answer !??
I think the best it woud be if I could connect two PC board together in X mode .
I would get the power what I want and I would have XLR input !!
Greetings

[gaborbela]

Hello
Here is the data of the OPA.
http://www.thatcorp.com/datashts/1200data.pdf
Greetings

[AndrewT]

Why do you want your amps to operate in balanced mode?
Is it to obtain improved interference rejection?