[ARC5] 12SB7

[Ian Wilson]

The {6,12}SB7 have the same characteristics as the {6,12}BA6, which may be
easier to find. You could then rig up a 9-pin to octal conversion.

73, ian K3IMW

On Mon, Apr 4, 2016 at 6:05 AM, Phillip Carpenter <carpenterpa at tds.net>
wrote:

> Hi All,
>
> I have plenty of 12SA7s on hand. I'm looking for the higher
> transconductance 12SB7s.
>
> If none show up I'll sub 6AB7Ys.
>
> Respectfully,
>
> Phillip
>
> Sent from my iPhone
>
> > On Apr 4, 2016, at 8:18 AM, Bill Cromwell <wrcromwell at gmail.com> wrote:
> >
> > 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
> >
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