[time-nuts] HP 10811 update

[Robert LaJeunesse]

FYI, The MPSA18RLRAG is a stock item at Digi-Key, min beta 500 at 1 & 10mA, 45V & 200mA rated, TO-92. $0.33 each.

http://www.digikey.com/product-detail/en/MPSA18RLRAG/MPSA18RLRAGOSCT-ND/1139919




>________________________________
> From: paul swed <paulswedb at gmail.com>
>To: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
>Sent: Wednesday, July 24, 2013 9:29 PM
>Subject: Re: [time-nuts] HP 10811 update
> 
>
>Well learned quite a bit Q4 does have an issue. Further there is a reason
>it has such high Beta. Its must deliver 30 ma to the oscillator and buffer.
>I was quite surprised by this current level. I was  guessing the oscillator
>was a few mils and the buffer maybe 8.
>The 2n3904 simply does not cut it. Need to do some digging in the ole
>transistors.
>Regards
>Paul.
>
>
>