Pot question on ETI651

[RobN]

Would this be a bottom view or top view of the pot’s on the ETI651.

[dbanner]

Back of pot view. How do I know? You could not solder any wire to front of pot, only on back of pot housing(for grounding) as shown. This is good clue as to orientation of pots in diagram.

[dbanner]

Hmm.

[RobN]

I kinda figured the back as well just because if it was the front they would be a small circle in the middle to represent the stem and as you said connecting to the bottom of the base. Also I’m not sure it would make a difference other than the log pot, I not sure but I thing the other 2 would work either way. I would like to know for sure if anybody wants to collaborate.

[RobN]

Or maybe it’s elaborate, which ever.

[dbanner]

Yes, it usually makes a difference. Normally you'd want to turn clockwise to increase, anticlockwise to decrease, generally speaking. So the wiring to the outer lugs are important to get right. I've connected pots the wrong way many, many times, Sometimes I get lucky. I just switch wires around, no problem.
Unlike me, if you pay careful attention to the wiring diagram, you get it right the first time.

[dbanner]

The clockwise/ anticlockwise is when viewing from front panel

[dbanner]

I should have mentioned, as you stated, the log pots, pin 1 is ground. And it definitely makes a difference getting the wiring correct.
I noticed the volume pot in your diagram, pin 1 is connected to ground, so I'm guessing it's a log pot. The other two pots most likely are linear pots? I guess the components list would specify.

[dbanner]

I know volume pots are supposed to be logarithmic type pots. I don't bother with volume on my rigs.
I always have trouble finding log pots at my local dealer. And I could never remember if A or B is log or Lin. I always get them mixed up. Then I think in the old day these were reversed with the inclusion of C type which I don't remember what the C was for. That why I never hassle over volume pots. I just leave them out whenever I can

[RobN]

Yes there seems to be a issue for the A & B suffix it seems to have changed from the past. There is a good article about it on the internet that I have read and it still don’t make any sense why. I guess just to mess with our heads. I get them from digikey here in the states that have tons of different kinds and explain the A&B crap on the data sheet.

[RobN]

I’m going to go ahead and assume (which I don’t like to do because it makes a a!! Of u & me) that it is the bottom view just because they don’t show the stem and as you said term 1 to ground on the log pot. Thanks for the help. Rob.

[nonkapo]

At the time in the 80s 90s when I became ham radio amateur A was always the linear, B was always logarithmic. However as my country was in the communist block at the time it is very likely the western manufacturers to have different opinion . I hope this is helpful.

[kt315]

new reality of our days

[nonkapo]

LoL, that kinda explain it all:-)