[volt-nuts] Replace neons with LEDs in Fluke 845AB

[Dallas Smith]

Hi Lou,

It's normal for some leakage in germanium transistors. Do you have a 
curve tracer?
If you change them to Si you will have to re-bias them (i.e. R207_8).
The 84 Hz may change also, might have to adjust C203.
But should be possible.

Dallas


On 6/6/2016 7:33 AM, Lou Amadio wrote:
> For Dallas Smith
> Thanks for the info. It is in keeping with the original design.
> My 845AB 15v supplies are currently down and I suspect the germanium
> transistors around T202 may be leaky?.
> Am thinking of replacing them with Si transistors. Your thoughts?
> Regards, Lou
>
> On Mon, Jun 6, 2016 at 12:35 PM, Dallas Smith <dosmith at outlook.com> wrote:
>
>> Hi Lou,
>>
>> Its been awhile since I made this mod, but I had the foresight to save the
>> project to K04BB's site.
>>
>> K04BB /Fluke/Fluke 845A AB <
>> http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Fluke/Fluke_845A_AB
>> Still works great, hope you have the same results.
>>
>> Dallas
>>