nextalcupfan
Well-known member
- 348
- 507
- 93
- Location
- NW Missouri
Fired up my 803a for its monthly test run, noticed my UPS hooked to my computer was showing an input voltage of 111-113V.
Last month it was around 119-121V.
I got my Fluke 17B out to confirm and L1-L3 was reading 231V. (When I last set it earlier this year I put it at 244V)
I was able to adjust it back up to where L1-L3 was at 241V but I noticed 2 things.
1. The voltage adjust potentiometer is almost maxed out.
2. When I was adjusting it it didn't seem to be acting right. The first thing I did was turn the knob down and the voltage went up by 0.5V before it started going down.
I also noticed the voltage seems to be ranging a bit more than usual (+-2V)
Going to figure out what TM the regulator test procedure is in and run that test sometime tonight, but I have a feeling its the probably the potentiometer going bad.
I should note I've sprayed it with Deoxit in the past as a preventative measure.
To be honest I'm probably going to just replace the entire VR with one of @kloppk 's units since I've been considering doing that anyway.
Last month it was around 119-121V.
I got my Fluke 17B out to confirm and L1-L3 was reading 231V. (When I last set it earlier this year I put it at 244V)
I was able to adjust it back up to where L1-L3 was at 241V but I noticed 2 things.
1. The voltage adjust potentiometer is almost maxed out.
2. When I was adjusting it it didn't seem to be acting right. The first thing I did was turn the knob down and the voltage went up by 0.5V before it started going down.
I also noticed the voltage seems to be ranging a bit more than usual (+-2V)
Going to figure out what TM the regulator test procedure is in and run that test sometime tonight, but I have a feeling its the probably the potentiometer going bad.
I should note I've sprayed it with Deoxit in the past as a preventative measure.
To be honest I'm probably going to just replace the entire VR with one of @kloppk 's units since I've been considering doing that anyway.