Nuvistors? OR NOT?

[ZAP101]

Hey all,
Many thx to hot water...
Can anybody identify the following (3) Tubes(if they even are tubes...They are small,like a nuvistor, but they are Glass with multiple leads...I cannot find the p#s on any Vac. tube site??? ???
The #s are as follows...
Sylvania
SD-804A
SD-806C
SD-834

                                                                    Many thx,
                                                                                      mike
What a great forum! ;D

 

[ZAP101]

OK everyone here is what I have found so far...these are subminiature Sylvania Developmental Tubes...The SD-834 directly crosses with a 6k4...the 804A is a triode, and the 806C is a pentode...Still looking for a pinout on the latter two, any help?

                                                                                                    Thanks,
                                                                                                                mike