Parts for dynaco 400

you will probably need to buy an entire non working unit and scavenge the parts.

does anybody have a non working unit? dynaco st 400

Keep an eye on e bay...also check for amateur / ham radio swap meets. You will no doubt find one if you are patient.
also a meter can be rebuilt by a metrologist, new bearings and everything. Another idea is to replace both meters with new ones, like Simpson or others available....

i got a pair of 1970 magnapan mg-1s .i tried them out but they sounded kinda lifeless. does any body know any thing about these speakers i hear you can rebuild them and how is the bass response on these does any body know ? -thanks