• 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.

Lundahl LL1630/10mA Single Ended Preamp Output Transformers

Pair of Lundahl LL1630/10mA

Selling a pair of Lundahl LL1630 preamp output transformers gapped at 10mA.

These are single ended preamp output transformers. They have a
a 7.2:1 step down ratio, and are gapped for 10mA unbalanced DC current.

Suggested uses:

  • A traditional configuration with a single or paralleled 6SN7 sections, depending on the operating point and current you want to run. One section run at 7-10mA works, or you could parallel two sections at 5mA each.
  • These are ideal for a high-gain, low-Rp tube like a 5842/WE417A line stage run at a more sane 10mA of plate current for a more delicate sound.
  • The above 5842/417A would also make an excellent first stage driver for an LCR RIAA circuit.

These were originally designed to be used in a special configuration (paralleled primaries and secondaries) in the Ciuffoli SESS Tube Headphone Amplifier using the 5842 tube.

Asking $170/pair plus shipping from St. Louis, MO 63108 USA.
Please feel free to email with questions!

Thanks,
Tom
 

Attachments

  • Lundhal_ll1630_010.jpg
    Lundhal_ll1630_010.jpg
    180.1 KB · Views: 350
  • Lundhal_ll1630_011.jpg
    Lundhal_ll1630_011.jpg
    180.6 KB · Views: 358
  • Lundhal_ll1630_012.jpg
    Lundhal_ll1630_012.jpg
    172 KB · Views: 305