Huntron 1005 Oscillator can we find the problem?

Thread Starter


Joined Apr 9, 2020
Hi All,
like many the Oscillator died in my Huntron 1005B. as you know they are no where to be found. I came across the old kit schematic and figured I would try and build one. My 1st problem was IC1 and IC2 as they are not identified in the original schematic. I was told by some members to try LM336.
At this point I have made the PCB but its a no go. I seem to be able to adjust the gain a bit but it seems to go into clipping very fast. The frequency does not adjust at all. So here I am bringing it to the pros. It should produce 80Hz at 10VPP.
Any suggestions or see any errors?
Best regards

Moderator edit: Follow up from this similar thread.



Joined Aug 27, 2009
If it looks like this . The Oscillator is dead. Guaranteed. I think all the others are jealous.LOL It's a great tool to have..
I had about 10 of the 2000 series. Donated all but one of them because the test voltages (LOW (10Vpk), MED1 (15Vpk), MED2 (20Vpk) and HIGH (60Vpk) ranges ) are potentially dangerous to components inside modern low-voltage circuits. Analog signature analysis (ASA) was great when things were a lot more primitive. white paper.pdf

Note: This post was moved by a MOD from another Huntron thread so it's not trolling the OP's questions about the Oscillator.
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