I want to add a couple of small meters 1-100 mA and 0-10(ish)VDC to the front of my soon to be built 300B amps. There is a large amount of blank green surface I want to create some interest within as well as providing some information.
I have some of those inexpensive meters like below but I'd like something bit more classy and better quality. The advantage of this type is if it fails, it is easily replaced. The vintage stuff, like I've used in the past (second pic), has gotten stupidly expensive and hard to source matched pairs.
Thanks for any leads/thoughts.
I have some of those inexpensive meters like below but I'd like something bit more classy and better quality. The advantage of this type is if it fails, it is easily replaced. The vintage stuff, like I've used in the past (second pic), has gotten stupidly expensive and hard to source matched pairs.
Thanks for any leads/thoughts.
I have found the best meters in the old stock of surplus houses electronicsurplus.com (OH) and surplussales.com (IA). You can convert a microammeter into a voltmeter with a series resistor. To convert microamps to amps you need a shunt in parallel. I bought some old Simpsons last year.
I suppose the orientals make these now, but everything is so digital I have not seen them in catalogs.
I suppose the orientals make these now, but everything is so digital I have not seen them in catalogs.
I use the 85C1 series, available from Aliexpress and elsewhere. Nice looking, no issue so far.
https://www.finglai.com/products/instruments/pointer-ammeter-and-voltmeters/85C1/
https://www.finglai.com/products/instruments/pointer-ammeter-and-voltmeters/85C1/
I have to wonder how well made is a meter that sells for less than $2.00 USD?
I'm wondering what these are like ... on digikey market place.
https://www.digikey.com/en/supplier-centers/sifam-tinsley-instrumentation
https://www.digikey.com/en/supplier-centers/sifam-tinsley-instrumentation