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.
https://forum.allaboutcircuits.com/...king-for-some-advice-on-repair-please.176073/

 

IC1 and IC2 are 2.5V references. LM334-2.5. I found it in an obscure parts list.

 

IC1 and IC2 are 2.5V references. LM334-2.5. I found it in an obscure parts list.

Much appreciated. I also realized D4 was reversed in my schematic but its still not working.

 

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.

https://smtnet.com/library/files/upload/ASA 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.