Good question. These are older, and say “Tentlabs heater supply” on the schematic and “filament supply” on the box. Original packaging. Rev1.1. I may need to call Tentlabs and ask, unless someone can tell by the picture.
I have sent off an email to Tentlabs for help. My guess is DHT and 2.5A, but can really tell. I will discount them if you want to try them out, or wait until I have more info.
From Tentlabs:
hello Josh,
these are old ones, how nice to see them.
In those days I called them heater supplies, but they were intended to heat filaments. Nowadays these are called filaments and a bit more sophisticated. Their current is limited to 1,5A, well suited for a 300b for instance.
let me know if this helps.
best wishes,
-
Guido
hello Josh,
these are old ones, how nice to see them.
In those days I called them heater supplies, but they were intended to heat filaments. Nowadays these are called filaments and a bit more sophisticated. Their current is limited to 1,5A, well suited for a 300b for instance.
let me know if this helps.
best wishes,
-
Guido