5687 Tong-Sol NOS

[hottube]

I tested these tube on A HICKOK TV7-U. Low 38
88 - 90 date code 644
88 - 86 644
91 - 91 644
99 - 98 644
Two nice pairs here
70 and shipping
thank you stay safe

 

[merlin el mago]

I didn't see the Tungsol brand marked in the tubes.

 

[hottube]

well thats what they are. If you want them I will shot a pic.Or you can run the date code
If not I will get to it
thanks Rick

 

[Duke58]

They are Tung Sol tubes.

Confirmed by the "3" under the 5687 "stop sign" markings.

I've been running a pair in my 300B amp for the past year.