Teflon sockets

I have used Jakeband teflon sockets for over 3 years. They are very well made and of high quality. Luciano from Jakeband can provide you with any custom socket you may need. This time, I requested a set of sockets for my 813 transmitting valves, a pair of UX-4 for the 300B and a pair of octal sockets for the driver stage.

Construction overview

Jakeband uses the following materials for the socket:

  1. Tellurium Copper (CuTe)  for pins
  2. Virgin teflon made in Germany
Jakeband sockets
Jakeband sockets

The socket pins are machined with CNC from a solid core copper tellurium CuTe with tolerances within +/- 0.01 mm. The contact surface which is obtained is the highest possible.Thus there is a better grip and and a lower electrical resistance and therefore better heat dissipation (e.g. on the filament pins).

The pins undergo three surface treatments:

  1. 1° electrolytic acid copper   to remove any impurities
  2. 2° electrolytic silver 99.999% thickness 20 microns
  3. 3°  24k gold thickness 3 microns to prevent oxidation and give more surface hardness

Why using CuTe pins?

The copper has a conductivity rating of at least 100% IACS (International Annealed Copper Standard). Brass has a conductivity rating of 28% IACS. Tellurium copper(CuTe) contact pin provides up to 320% greater conductivity than a standard brass pin

Pin gold plating

The gold plate is 3 micro-inches thick. It is purely there to prevent oxidation (and increases the surface hardness) however doesn’t  contribute to the conductive process. In fact gold is less conductive than tellurium copper. The gold plating is direct, nickel free.

Threaded pins

The new sockets come with threaded pins. This is an interesting concept that Jakeband is introducing and will be keen to test various connectors which will simplify the wiring to the socket.

I hope to test the new sockets shortly.

Contacting Jakeband

If you want to request them, you can reach out directly to Jakeband using the following form:



2 Replies to “Teflon sockets”

  1. When heated to a temperature above 260 ° C starts thermo-oxidative degradation of PTFE-4 with the release perfluoroisobutene (1st class of danger), hydrogen fluoride (2nd class of danger), carbon monoxide and tetrafluoroethylene (4th class of danger). At concentrations above MPC hydrogen fluoride and perftorizobulilen irritate the mucous membranes of the respiratory tract, causing inflammation of the respiratory system and in high concentrations – pulmonary edema. Hydrogen fluoride has the ability to cumulation. Carbon monoxide causes suffocation due to the formation of carboxyhemoglobin, acts on the central nervous system. Inhalation of fine particles of the polymer (PTFE spray is a substance of the 4th class of danger), as well as the volatile products evolved when heated, causing the phenomenon of “polymer fever”, reminiscent of metal (fever, chills, irritation of the upper respiratory tract, cough, shortness of breath ). Inhalation tetrafluoroethylene in significant quantities results in a plethora of organs, causing bleeding in the lungs, spleen, dystrophic changes leads to the liver.

    1. Thanks for the info on Teflon. I’m interested to hear if you think that 260C can be reached on the PTFE when soldering which will produce the degradation you quoted. It’s hard for me to see that it will happen. Any evidence to share?

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