[ARC5] 12SB7

[Bill Cromwell]

Hi Les..
......Phil..
       .....Everybody,

I noticed that I have two of the 12SA7 in captivity here. I didn't find 
a 12SB7 datasheet/page to compare so I stopped and did not comment. If 
it turns out that Phil can actually use the 12SA7 I have one in glass 
and one in metal. I'll run them over my tube tester (to eliminate gross 
defects) and Phil can have them for the cost of postage. I use USPS 
First Class postage For U.S. and territories) for items that small and 
light and it comes to less than the smallest Flat-Rate boxes.

73,

Bill  KU8H


On 04/04/2016 02:14 AM, Leslie Smith wrote:
> Hello Phillip
> I cannot help with 12SB7, but suggest you compare the xSB7 with xSA7.
> According to the data here, the two have the same pin (base)
> function/connection.
> The xSA7 has half the conversion gain of the xSB7, and needs double the
> bias.
> Other parameters are close.  I did NOT check the heater current for the
> 12SB7!
> ESRC sell the 12SA7 for a reasonable price.  The 12SA7 is available from
> other sources too.
>
>
>     73 de Les Smith
>     vk2bcu at operamail.com
>
>