Re: Tek 576 Curve Tracer solid state replacement for relays ?


Brad Thompson
 

garp66 wrote on 1/6/2020 5:01 PM:

hi,
Wondering if anyone has replaced any of the mechanical relays in a Tek 576 ( Or any to the other curve tracers) , with solid state relays ?

There might be some issue with HV areas, but modern HV IR HexFets might be able to handle the HV.

rick
Hello--

A solid-state relay (SSR) uses a semiconductor device as the electrical contact.
The voltage drop across the device varies with the contact current and
hence could introduce an error. A clunky old mechanical contact is
better in this respect.

If you were starting a curve-tracer design, you could investigateĀ  SSR properties
and possibly compensate for errors, but retrofitting SSRs in an existing
curve tracer would be messy,

73--

BradĀ  AA1IP

Join TekScopes@groups.io to automatically receive all group messages.