Threshold FET/10 He Service Manual

[Nounours18200]

Hi friends,

I am looking for the Threshold FET-10 preamplifier Service Manual: does any of you own this document ?

My email address is : nounours18200 (at) free (dot) fr

Thank you very much for your help

 

[analog_sa]

Analog Guy once posted a schematic without component values. It is more than sufficient if you need it for repair.

 

[Nounours18200]

I have sent him an email to get the info he has if he accepts to share it.

The "diagram" he posted in this topic
here

is only a low resolution PCB, but I have not found a complete schematic : and I am looking for the schematics with the components values and types, as I plan to replace some of them to improve it...

If any of you knows a source for the complete Service Manual...

Thanks a lot,

 

[marginwalker]

I'm very interested too!

I got a original Threshold Fet nine, it sounds very well and i'd like to give a chanche to a diy Fet-10 too 😉

 

[Nounours18200]

To date, I have not succeeded in getting this Service Manual:

-I have e-mailed almost all the websites supplying service manuals: none of them has it
-I have posted a lot of messages in various high-end audio forums, but no success
-I have sent a request to Threshold Audio Inc: no response yet (but I sent the mail just yesterday), but they will probably reply "ask to an official Threshold service office"....: not convenient for us.
-I have send 3 requests to Jon Soderberg from which I got other Service manuals in the past (he is a very nice person and his service manuals are excellent), but he has not replied to my mails: maybe he is on vacation.

it looks like if nobody has this "bloody" document ...

Any suggestion is welcome !

 

[Zen Mod]

To date, I have not succeeded in getting this Service Manual:

-I have e-mailed almost all the websites supplying service manuals: none of them has it
-I have posted a lot of messages in various high-end audio forums, but no success
-I have sent a request to Threshold Audio Inc: no response yet (but I sent the mail just yesterday), but they will probably reply "ask to an official Threshold service office"....: not convenient for us.
-I have send 3 requests to Jon Soderberg from which I got other Service manuals in the past (he is a very nice person and his service manuals are excellent), but he has not replied to my mails: maybe he is on vacation.

it looks like if nobody has this "bloody" document ...

Any suggestion is welcome !

well - if you send me one FET/10 , I'll back - engineer it ,and write service manual .

and I'll send you Fet/10 back ................

maybe you can ask some of your country man DiyA fellows to help you in back engineering .....

for start - you can make few ( as much you cant) pics of it and post them here ;

you can even mail big ones to me - I can shrink them , in case that you can't .

 

[analog_sa]

Yup. I'm with Choky. Reverse engineering a simple device like this is trivial, fast and easy. And not nearly as humiliating as begging for a freebie 🙂

The circuit is available - just read the component values from your unit.

 

[Nounours18200]

for start - you can make few ( as much you cant) pics of it and post them here ;

OK ! As soon as I am back to home after new year, I will take a lot of pics that I will post here (I had already planned to take pics for myself) so that we can work on this together).

Thanks to all, and happy christmas !
N.

 

[ANADIGIT]

FET 10/HE

I just bought FET 10/HE from ebay !
Has anyone interest ?

I can clone it very easy !

Thanks
Anadigit

 

[marginwalker]

It would be great!

 

[ANADIGIT]

PCB

I'm going to re-engineer it soon !
Very surprise with servo control and parallel differential stage !

There's no coupling cap and used +/- 18V REG

Thanks
Anadigit

 

[ANADIGIT]

Naked

Mother board without diff module look like PASS X2 without UGS module !

Schematic coming soon !

Thanks
Anadigit

 

[Nounours18200]

I have the full and official Threshold FET-10 He diagram: 7 pages that (high-resolution).

I send this full Diagram to Anadigit and ZenMod to help them in their work: I also study an upgrade for my FET-10, so I am very interested in sharing your ideas, particularly regarding parts replacement.

I hope we will design a "state of the art" upgrade for this grand father preamp: be aware that mine is far better than 99% of the current preamps actually still in production! With my SA/6e class A monoblocs, this preamp is a killer ...


Nounours🙂

 

[ANADIGIT]

Hi,

Give me a few weeks to completed them for upgraded PCB !

Thanks
Anadigit

 

[Nounours18200]

😀 😀

take your time and I hope you will provide us good ideas for this upgrade !!

I also work on changing some parts for better ones and will keep you informed when I have defined which ones I replace...

Nounours

 

[proton28]

Does this continue somewhere else? Where's the diagram? Where is the "state of the art" upgrade design?

 

[Zen Mod]

........

few times posted .... everywhere