On Mon, 25 Jan 2016 22:13:35 -0000, "Gareth Magennis"
wrote:

Hi,

this is really annoying, but a good opportunity to learn something useful.

I have an old Urei Power Amp that needs its DPDT 10A speaker output relay
replacing.

Surprised you need DPDT. DPST should seve this purpose, if the amp has
internal Zobel termination.

It's annoying because the relay fitted has a totally non conventional pin
configuration, so the usual generic cheap replacement is going to involve
drilling holes in the PCB and isolating pads and using glue and stuff
because some solder pads will have to go etc.

So I thought about maybe using Solid State relays, which should be
physically smaller and lighter, and could be mounted in little patches of
available free space.

SSRs will have an objectionable voltage drop, introducing distortion
whether or not the drives are compatible.

Make and model of original?

RL