Re: tektronix 7S14 batteries and time base question


Bruce Griffiths
 

Just use SMT LEDs.
However the photocurrent will need to at least 50 uA to ensure that output impedance is low enough.
A shunt capacitor across the output LED may also be required.
Bruce

On 26 December 2019 at 16:38 Gary Robert Bosworth <@grbosworth> wrote:


It is a shame that the original spacing for the batteries was so tight. I
realize the need to keep the leads short, but it makes it difficult to
replace the Mercury cells in such a tight spot. It would be nice if
someone could come up with a tiny hybrid fix that could be dropped into the
small footprint.

Gary

On Tue, Dec 24, 2019 at 11:21 AM Bob Headrick <bobh@...> wrote:

Efficiency as measured by voltage transfer, it would be interesting to
compare power transfer efficiency. With 20mA on the driven LED is it
possible to get even a few microamps of output current?

- Bob W7OV

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Miguel Work
Sent: Tuesday, December 24, 2019 8:49 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] tektronix 7S14 batteries and time base question

IR wins! :)

Efficiency
IR 1,16 0,85 73,28%

RED 1,9 1,3 68,42%

YELLOW 2 1,2 60,00%

BLUE 3,2 2,3 71,88%





--
Gary Robert Bosworth
@grbosworth
Tel: 310-317-2247


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