you can try cleaning up the sockets and the old lamps (i wouldnt try this with new lamps or sockets) A
wire brush works wonders. ALso a little scraper tool (you can find scrapers,looks like a dentist scraper) at many electronics stores to clean up the lamp
socket. It may get you through a show. Also getting a can of deox will help out.
While origionally disagreeing with the post also, still to get you
thru a show its a valid
point - even if self defeating and a waste of time in for the price of the replacement lamp one could re-wire the
socket also for the same amount of time it would take you to clean this type of
socket. Also not mentioned is after you clean it would be to treat it.
Lots of past discussions on cleaning lamp sockets/bases in the past. Overall view is a TP-22 style
socket, not able to clean sufficiently or worth the time. In getting you
thru a show and if absolutely necessary, copper based deoxident and or electronics cleaner with lubricant McMaster #7437k15 should help some but probably not sufficiently to save the day for more than a few shows. This assuming a re-surfaced lamp
socket that I am not convinced is possible with a G-9.5 lamp
socket or the pins. Both in need of service
call once trashed.
As above with all other recommendations, and get someone qualified to supervise this change of lamp
socket with you while doing it or
send it to a professional shop for doing. Many other things to look at while changing a lamp
socket.
On the other
hand for some medium
pre-focus (P-22s), and bi-pins of G-22 or larger in both lamp
base to the lamp and
fixture lamp
socket, it is possible to resurface sufficiently in many cases. A question of more material to work with and easier to get to. Your Fresnels for instance, possible to resurface and they might be fine a few more years in optimum conditions. Short of doing it correct however... best to replace even still all lamps and sockets effected.