I have an old Simpson 260 Analog Meter (Series 5) that I am repairing/restoring. I have a few questions about replacement resistors.
If you look at the picture, you can see the few that I'm looking at right now.
1. The bottom one is a 238 ohm .5W Fixed Film resistor. My first question is, looking at the Digikey selections for a replacement, there are choices for metal film, carbon film, etc. The only data that I have been able to find so far is that this is simply "fixed film". Does the type really matter? If so, what would be the correct replacement?
2. Also, that particular resistor value is 238 which is an odd value. Looking at what Digikey has, I can get a 237 ohm metal film 1% .5W resistor. Would this possibly work?
3. Next, the three resistors above the fried one are identified as "wire wound inductive". I'm not familiar with this and am not sure what to look for or select. Also, the tolerance on these is .5% and they need to be rated at .5W. I'm not sure if any of them are bad yet, but as you can see from the photo, they have some nasty green corrosion going on. My question is, what type would be a suitible replacement for these (assuming they are bad)?
I have attached a picture of what I am looking at, the schematic that I am working from and the page from the manual with the parts list.
EDIT: By the way, in the picture starting from the fried resistor at the bottom and working up on the corroded resistors. They are R5, R18, R19 and R17.
Any help or advice is certainly appreciated.