[ARC5] 12SB7

[Ian Wilson]

Er, I meant 6BA7/12BA7 thank you the awake list member who corrected me :)

73, ian K3IMW

On Mon, Apr 4, 2016 at 7:07 AM, Ian Wilson <ianmwilson73 at gmail.com> wrote:

> 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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