• The swap meet forum is for private non-commercial transactions. Only unmoderated members can post here.

    diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members. Use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

Haufe ST7679/1 audio transformers

Status
Not open for further replies.
Hi, these were the transformers I used most in DAC projects. I have the datasheet available. They are 1:1 transformers shielded by mumetall. Both have the same datecode. They sound excellent which is backed up by their properties as described in the datasheet. Haufe transformers are often used in quality studio equipment and broadcast gear.

As I just stumbled upon the pictures I took I don't have the actual data available right now. I am thinking of 100 Euro incl. shipping within Europe for both. These were soldered and desoldered with tin/lead solder and have not been overheated and such. They measure identical (as expected). As usual these are allergic to DC so make sure you have low offset of use caps in series.
 

Attachments

  • IMG_6538.JPG
    IMG_6538.JPG
    744.4 KB · Views: 318
  • IMG_6539.JPG
    IMG_6539.JPG
    748.3 KB · Views: 311
Last edited:
JP - thanks for taking the time to get the measurements. I know that Haufe makes great transformers. Someone will be getting a good deal with these.

For my experiments, I've decided to go a different direction. I already have some larger transformers that I'll wire up external to my DAC. I'll be using them with an AK4497 based DAC and I want to try these for converting the differential outputs to filtered single ended.
Thanks,
---Gary
 
Status
Not open for further replies.