Quote from: TinselKoala on April 26, 2013, 07:20:22 AM
Hi GL very nice work as usual.....

I love your spectrum analyzer display. What instrument is that from?  My lab is sorely lacking in that regard; I have been trying to obtain a spectrum analyzer plugin for my HP180a for some time now but just can't afford it.

I'm a little scared of your copyright notice.... May I please have permission to copy that schematic image of your Oscillator to my hard drive, for my personal use only?   

When it's finally too dim to see, I wonder what would happen if you warmed the batteries gently.....

Cheers, keep up the good work...
--TK

TK,

Yes, you can copy my circuit drawing to your hard drive. :-)

The spectrum analyzer is from my Icom PCR-1000 receiver.
(Icom has also made a new model called PCR2500).
The program I use is freeware and is called Talk PCR.
See here: http://www.m0kgk.co.uk/pcr1000.php

I will try to warm the battery when the LED goes out. :-)

GL.

My JT battery voltage is now [26.04.2013 1545] down to 2,51 Volt. That is a drop
of 0,04 Volt in 9 hours. LED light is still visible, but very low.

GL.

My JT battery voltage is now [26.04.2013 2145] at 2,51 Volt. That is a drop
of 0,00 Volt in 6 hours. LED light is still visible, but very very low. The oscillator is
still running happily at 477KHz. Question now is, will the oscillator keep running
on the "battery self charge effect" now that each cell in the batteries is depleted
down to  0,2092 Volt? Time will tell........................

GL.

Try how long does it run from a farad capacitor or smaller.... 

Quote from: forest on April 26, 2013, 04:29:14 PM
Try how long does it run from a farad capacitor or smaller.... 

forest,

Yes, I will try that also. But first I want to see how long the oscillator will keep
running on the two depleted batteries. It might take some weeks, it may take
longer. I think this is an important test because I have never been able to
fully drain a battery to zero volt by shorting the battery.

GL.