[Radio Vintage]

I sell tube new boxed mod. 7403 / 3D21 or exchange with 6146B/S2001 ,
if you are interested ,
you write to my e_mail
Tnx Frank

[RapidRonnie]

On Nov 24, 12:14 pm, Radio Vintage wrote:
I sell tube new boxed mod. 7403 / 3D21 or exchange with 6146B/S2001 ,
if you are interested ,
you write to my e_mail
Tnx Frank

It might help to tell us what a 3D21 is since most of us have no
idea.

[David R Brooks]

RapidRonnie wrote:
On Nov 24, 12:14 pm, Radio Vintage wrote:
I sell tube new boxed mod. 7403 / 3D21 or exchange with 6146B/S2001 ,
if you are interested ,
you write to my e_mail
Tnx Frank

It might help to tell us what a 3D21 is since most of us have no
idea.

3D21 - pulse beam tetrode. 4kV, 175mA, 40W. (10AMPS peak!)