Good morning, all the connection you draw are correct. I'm sorry the colours aren't good in the pic, the R9 resistor is a 1K as you wrote, and the two resistors R7a and R7b are respectively 10K and 2K connected in series..
Sir mosfet66 . . . . . . . .
I made two 1X side by side dupes of your circuits component and foil sides and placed the guesstimated schema just below them .
Your component interconnects, I have marked up in PINK lines.
I checked out your perfboard creation . . . . . and by my green check offs of the pins of the IC . . . . . seems like all connections agree.
My view of the area under the RED star was a bit iffy, so I mainly depended on the foil side for that area for connections and routing confirmation.
Variants noted :
Seems like you had to opt for 46K resistors for the 43.2 Ones . . .no problem . . .as the only critical area with them are the R1-R2 slots, where that C portion amp halves the voltage supply
for use as a a reference. BUT you are STILL providing proper balanced voltage division with the present two 46 K's being used there.
There are some resistor color codes that just appear to be using all black bands to me.
To wit . . . . . the R9 at the very top should be a 1K, and it is one of those that appear all blacks, YET I am seeing the two REDS on the 2.2 ohm that is being just two positions over to its left.
Down at the bottom center, it looks like you had to make up R7 , by using two series resistors, of R7a--b, and to me, that R7a looks all blacks BUT seems like I can see the final RED "K"
band designator of the other R7b resistor.
Do we still have the original working board to compare against, or did it have to donate some of its parts for this construction, like the D1 damping diode and the power FET .
For further troubleshooting and analysis do you have an Old Silly Scope and know how to load, trigger and shoot it ?
Or possibly, you only have a DVM and maybe an older and additional analog metered VOM.
PLUS . . . just in case I have to introduce you to "Mac Gyver" *** testing . . . . .:
Some scrap electronics around that will yield us, a loan of an approximate
1 ufd capacitor in the poly family . . . . (Thats being of a type akin to your present C1).
About a 10 ufd electrolytic and some test leads with clip ends.( Or hook up wire to make equivalent solder tack on test leads with.)
(And I already sees that you has some "Yaller " hook up wire, you used for jumpers.)
***
https://en.wikipedia.org/wiki/MacGyver
http://lifehacker.com/top-10-awesome-macgyver-tricks-that-speak-for-themselve-476433796
http://www.cracked.com/photoplasty_1460_20-macgyver-style-tricks-fixing-everything-in-your-life/
Thasssssit . . . . .
Le Perfboard creation . . . . .
73's de Edd
.
Unfortunately i don't have an oscilloscope, i've got only a multimeter. The original circuit is safe (i bought all the components for the prototype).
I actually didn't understand what do you mean in the last part of your answer about the testing, can you explain it to me?
Furthermore I've got a question: I tested the cap and it gave me a 8.6nF value, is it right? I mean isn't it too little? Furthermore the cap I used in the prototype gave me a 7.7nF testing it...
Marco
