i was wondering when the early most version of the 70L7
became avaliable as well as the gt version
not to mention gt tubes from the first
thank you
tom

Tom, do a search or get on Antique Radio Forum for tube issue dates. D.K. Owens has developed a list of some tubes. It's interesting.

:i was wondering when the early most version of the 70L7
:became avaliable as well as the gt version
:not to mention gt tubes from the first
: thank you
: tom
:
:
:
:
:
:
:
:
:
:
:
:
:

: ok
:: thank you
:: tom
::
::
::
::
::
::
::
::
::
::
::
::
::

Hi

70L7GT was released on 3-28-39. No other versions are listed.

Norm

:: ok
::: thank you
::: tom
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::
:::